Re: BLE bug: Intel Bluetooth 7260 fails to scan and connect concurrently

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Hi Jaya,

I tried with the firmware you suggested, patch num "25" according to
dmesg log, but it has the same bug. I also tried some other revisions
but all seem to give the same error.

/Emil

2016-12-07 4:53 GMT+00:00 G, Jaya P <jaya.p.g@xxxxxxxxx>:
> Hi Emil,
>
> Can you try with this FW and verify. In the latest FW release there's no changes for the intel 7260 for B3 Card.
> http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/?id=e45d3860987a68a4c317e7b6e62bb81ffde8a93b
>
> Try with the above FW and share the results.
>
> Thanks,
> Jaya Praveen G
>
> -----Original Message-----
> From: linux-bluetooth-owner@xxxxxxxxxxxxxxx [mailto:linux-bluetooth-owner@xxxxxxxxxxxxxxx] On Behalf Of Emil Lenngren
> Sent: Wednesday, December 7, 2016 2:05 AM
> To: Bluez mailing list <linux-bluetooth@xxxxxxxxxxxxxxx>
> Subject: BLE bug: Intel Bluetooth 7260 fails to scan and connect concurrently
>
> I recently saw on this mailing list that the intel firmware patches have been updated, so I downloaded the latest firmware to see it being applied on my Asus TP300L computer with Intel Bluetooth 7260:
>
> [ 2044.429868] usb 1-1.4: new full-speed USB device number 8 using ehci-pci [ 2044.524374] usb 1-1.4: New USB device found, idVendor=8087, idProduct=07dc [ 2044.524383] usb 1-1.4: New USB device strings: Mfr=0, Product=0,
> SerialNumber=0
> [ 2044.539193] Bluetooth: hci0: read Intel version: 3707100180012d0d00 [ 2044.539242] Bluetooth: hci0: Intel Bluetooth firmware file:
> intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
> [ 2044.728245] Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated [ 2394.965515] usb 1-1.4: reset full-speed USB device number 8 using ehci-pci [ 2395.072161] Bluetooth: hci0: read Intel version: 3707100180012d0d27 [ 2395.072167] Bluetooth: hci0: Intel device is already patched. patch num: 27
>
> I have a custom application talking HCI directly and according to the LE supported states it supports both scanning and initiating a connection at the same time. But if I start a LE scan and then initiate a connection, it fails with the error code Connection Rejected due to Limited Resources (0x0d). If I however do it the other way around, first starting the connection attempt followed by starting scan, everything works as normal. This is clearly a bug in the firmware so I was just wondering if there were any Intel guys here willing to fix this? I've actually seen the same problem as well on a cheap Android Asus tablet having some Intel bluetooth chip in a snoop log.
>
> This is btmon log where it fails:
>
>
> < HCI Command: Reset (0x03|0x0003) plen 0
>                                       [hci0] 2238.125717
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.138612
>       Reset (0x03|0x0003) ncmd 2
>         Status: Success (0x00)
> < HCI Command: Read Local Version Information (0x04|0x0001) plen 0
>                                       [hci0] 2238.138702
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2238.139583
>       Read Local Version Information (0x04|0x0001) ncmd 1
>         Status: Success (0x00)
>         HCI version: Bluetooth 4.0 (0x06) - Revision 3584 (0x0e00)
>         LMP version: Bluetooth 4.0 (0x06) - Subversion 3584 (0x0e00)
>         Manufacturer: Intel Corp. (2)
> < HCI Command: LE Read Supported States (0x08|0x001c) plen 0
>                                       [hci0] 2238.139624
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2238.140580
>       LE Read Supported States (0x08|0x001c) ncmd 1
>         Status: Success (0x00)
>         States: 0x000000001fffffff
>           Non-connectable Advertising State
>           Scannable Advertising State
>           Connectable Advertising State
>           High Duty Cycle Directed Advertising State
>           Passive Scanning State
>           Active Scanning State
>           Initiating State
>             and Connection State (Master Role)
>           Connection State (Slave Role)
>           Non-connectable Advertising State
>             and Passive Scanning State
>           Scannable Advertising State
>             and Passive Scanning State
>           Connectable Advertising State
>             and Passive Scanning State
>           High Duty Cycle Directed Advertising State
>             and Passive Scanning State
>           Non-connectable Advertising State
>             and Active Scanning State
>           Scannable Advertising State
>             and Active Scanning State
>           Connectable Advertising State
>             and Active Scanning State
>           High Duty Cycle Directed Advertising State
>             and Active Scanning State
>           Non-connectable Advertising State
>             and Initiating State
>           Scannable Advertising State
>             and Initiating State
>           Non-connectable Advertising State
>             and Connection State (Master Role)
>           Scannable Advertising State
>             and Connection State (Master Role)
>           Non-connectable Advertising State
>             and Connection State (Slave Role)
>           Scannable Advertising State
>             and Connection State (Slave Role)
>           Passive Scanning State
>             and Initiating State
>           Active Scanning State
>             and Initiating State
>           Passive Scanning State
>             and Connection State (Master Role)
>           Active Scanning State
>             and Connection State (Master Role)
>           Passive Scanning State
>             and Connection State (Slave Role)
>           Active Scanning State
>             and Connection State (Slave Role)
>           Initiating State
>             and Connection State (Master Role)
>             and Master Role & Master Role < HCI Command: Set Event Mask (0x03|0x0001) plen 8
>                                       [hci0] 2238.140615
>         Mask: 0x2000000000018010
>           Disconnection Complete
>           Hardware Error
>           Flush Occurred
>           LE Meta
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.141588
>       Set Event Mask (0x03|0x0001) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Set Controller To Host Flow Control (0x03|0x0031) plen
> 1                                      [hci0] 2238.141631
>         Flow control: Off (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.142587
>       Set Controller To Host Flow Control (0x03|0x0031) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Read BD ADDR (0x04|0x0009) plen 0
>                                       [hci0] 2238.142628
>> HCI Event: Command Complete (0x0e) plen 10                                                                 [hci0] 2238.143580
>       Read BD ADDR (0x04|0x0009) ncmd 1
>         Status: Success (0x00)
>         Address: 80:19:34:A6:44:B4 (Intel Corporate) < HCI Command: LE Read Buffer Size (0x08|0x0002) plen 0
>                                       [hci0] 2238.143785
>> HCI Event: Command Complete (0x0e) plen 7                                                                  [hci0] 2238.144579
>       LE Read Buffer Size (0x08|0x0002) ncmd 1
>         Status: Success (0x00)
>         Data packet length: 27
>         Num data packets: 7
> < HCI Command: LE Read White List Size (0x08|0x000f) plen 0
>                                       [hci0] 2238.144607
>> HCI Event: Command Complete (0x0e) plen 5                                                                  [hci0] 2238.145573
>       LE Read White List Size (0x08|0x000f) ncmd 1
>         Status: Success (0x00)
>         Size: 32
> < HCI Command: LE Clear White List (0x08|0x0010) plen 0
>                                       [hci0] 2238.145649
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.146580
>       LE Clear White List (0x08|0x0010) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
>                                       [hci0] 2238.146610
>         Type: Passive (0x00)
>         Interval: 11.250 msec (0x0012)
>         Window: 11.250 msec (0x0012)
>         Own address type: Public (0x00)
>         Filter policy: Accept all advertisement (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.147569
>       LE Set Scan Parameters (0x08|0x000b) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
>                                       [hci0] 2278.538597
>         Scanning: Enabled (0x01)
>         Filter duplicates: Disabled (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2278.539579
>       LE Set Scan Enable (0x08|0x000c) ncmd 2
>         Status: Success (0x00)
> < HCI Command: LE Add Device To White List (0x08|0x0011) plen 7
>                                       [hci0] 2283.040471
>         Address type: Public (0x00)
>         Address: 80:E4:DA:70:57:6F (OUI 80-E4-DA)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2283.041654
>       LE Add Device To White List (0x08|0x0011) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Create Connection (0x08|0x000d) plen 25
>                                       [hci0] 2283.041752
>         Scan interval: 60.000 msec (0x0060)
>         Scan window: 30.000 msec (0x0030)
>         Filter policy: White list is used (0x01)
>         Peer address type: Public (0x00)
>         Peer address: 00:00:00:00:00:00 (OUI 00-00-00)
>         Own address type: Public (0x00)
>         Min connection interval: 20.00 msec (0x0010)
>         Max connection interval: 25.00 msec (0x0014)
>         Connection latency: 0x0000
>         Supervision timeout: 200 msec (0x0014)
>         Min connection length: 0.000 msec (0x0000)
>         Max connection length: 0.000 msec (0x0000)
>> HCI Event: Command Status (0x0f) plen 4                                                                    [hci0] 2283.042597
>       LE Create Connection (0x08|0x000d) ncmd 1
>         Status: Connection Rejected due to Limited Resources (0x0d)
>
>
>
>
>
> And this is the btmon log where the commands are sent in the other order:
>
>
> < HCI Command: Reset (0x03|0x0003) plen 0
>                                       [hci0] 2639.104712
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.117781
>       Reset (0x03|0x0003) ncmd 2
>         Status: Success (0x00)
> < HCI Command: Read Local Version Information (0x04|0x0001) plen 0
>                                       [hci0] 2639.117842
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2639.118772
>       Read Local Version Information (0x04|0x0001) ncmd 1
>         Status: Success (0x00)
>         HCI version: Bluetooth 4.0 (0x06) - Revision 3584 (0x0e00)
>         LMP version: Bluetooth 4.0 (0x06) - Subversion 3584 (0x0e00)
>         Manufacturer: Intel Corp. (2)
> < HCI Command: LE Read Supported States (0x08|0x001c) plen 0
>                                       [hci0] 2639.118818
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2639.119771
>       LE Read Supported States (0x08|0x001c) ncmd 1
>         Status: Success (0x00)
>         States: 0x000000001fffffff
>           Non-connectable Advertising State
>           Scannable Advertising State
>           Connectable Advertising State
>           High Duty Cycle Directed Advertising State
>           Passive Scanning State
>           Active Scanning State
>           Initiating State
>             and Connection State (Master Role)
>           Connection State (Slave Role)
>           Non-connectable Advertising State
>             and Passive Scanning State
>           Scannable Advertising State
>             and Passive Scanning State
>           Connectable Advertising State
>             and Passive Scanning State
>           High Duty Cycle Directed Advertising State
>             and Passive Scanning State
>           Non-connectable Advertising State
>             and Active Scanning State
>           Scannable Advertising State
>             and Active Scanning State
>           Connectable Advertising State
>             and Active Scanning State
>           High Duty Cycle Directed Advertising State
>             and Active Scanning State
>           Non-connectable Advertising State
>             and Initiating State
>           Scannable Advertising State
>             and Initiating State
>           Non-connectable Advertising State
>             and Connection State (Master Role)
>           Scannable Advertising State
>             and Connection State (Master Role)
>           Non-connectable Advertising State
>             and Connection State (Slave Role)
>           Scannable Advertising State
>             and Connection State (Slave Role)
>           Passive Scanning State
>             and Initiating State
>           Active Scanning State
>             and Initiating State
>           Passive Scanning State
>             and Connection State (Master Role)
>           Active Scanning State
>             and Connection State (Master Role)
>           Passive Scanning State
>             and Connection State (Slave Role)
>           Active Scanning State
>             and Connection State (Slave Role)
>           Initiating State
>             and Connection State (Master Role)
>             and Master Role & Master Role < HCI Command: Set Event Mask (0x03|0x0001) plen 8
>                                       [hci0] 2639.119796
>         Mask: 0x2000000000018010
>           Disconnection Complete
>           Hardware Error
>           Flush Occurred
>           LE Meta
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.120773
>       Set Event Mask (0x03|0x0001) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Set Controller To Host Flow Control (0x03|0x0031) plen
> 1                                      [hci0] 2639.120800
>         Flow control: Off (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.121775
>       Set Controller To Host Flow Control (0x03|0x0031) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Read BD ADDR (0x04|0x0009) plen 0
>                                       [hci0] 2639.121799
>> HCI Event: Command Complete (0x0e) plen 10                                                                 [hci0] 2639.122772
>       Read BD ADDR (0x04|0x0009) ncmd 1
>         Status: Success (0x00)
>         Address: 80:19:34:A6:44:B4 (Intel Corporate) < HCI Command: LE Read Buffer Size (0x08|0x0002) plen 0
>                                       [hci0] 2639.122952
>> HCI Event: Command Complete (0x0e) plen 7                                                                  [hci0] 2639.123772
>       LE Read Buffer Size (0x08|0x0002) ncmd 1
>         Status: Success (0x00)
>         Data packet length: 27
>         Num data packets: 7
> < HCI Command: LE Read White List Size (0x08|0x000f) plen 0
>                                       [hci0] 2639.123803
>> HCI Event: Command Complete (0x0e) plen 5                                                                  [hci0] 2639.124771
>       LE Read White List Size (0x08|0x000f) ncmd 1
>         Status: Success (0x00)
>         Size: 32
> < HCI Command: LE Clear White List (0x08|0x0010) plen 0
>                                       [hci0] 2639.124829
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.125780
>       LE Clear White List (0x08|0x0010) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
>                                       [hci0] 2639.125824
>         Type: Passive (0x00)
>         Interval: 11.250 msec (0x0012)
>         Window: 11.250 msec (0x0012)
>         Own address type: Public (0x00)
>         Filter policy: Accept all advertisement (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.126797
>       LE Set Scan Parameters (0x08|0x000b) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Add Device To White List (0x08|0x0011) plen 7
>                                       [hci0] 2677.822165
>         Address type: Public (0x00)
>         Address: 80:E4:DA:70:57:6F (OUI 80-E4-DA)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2677.822857
>       LE Add Device To White List (0x08|0x0011) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Create Connection (0x08|0x000d) plen 25
>                                       [hci0] 2677.822939
>         Scan interval: 60.000 msec (0x0060)
>         Scan window: 30.000 msec (0x0030)
>         Filter policy: White list is used (0x01)
>         Peer address type: Public (0x00)
>         Peer address: 00:00:00:00:00:00 (OUI 00-00-00)
>         Own address type: Public (0x00)
>         Min connection interval: 20.00 msec (0x0010)
>         Max connection interval: 25.00 msec (0x0014)
>         Connection latency: 0x0000
>         Supervision timeout: 200 msec (0x0014)
>         Min connection length: 0.000 msec (0x0000)
>         Max connection length: 0.000 msec (0x0000)
>> HCI Event: Command Status (0x0f) plen 4                                                                    [hci0] 2677.823814
>       LE Create Connection (0x08|0x000d) ncmd 2
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
>                                       [hci0] 2686.689549
>         Scanning: Enabled (0x01)
>         Filter duplicates: Disabled (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2686.690890
>       LE Set Scan Enable (0x08|0x000c) ncmd 2
>         Status: Success (0x00)
> --
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2016-12-07 5:53 GMT+01:00 G, Jaya P <jaya.p.g@xxxxxxxxx>:
> Hi Emil,
>
> Can you try with this FW and verify. In the latest FW release there's no changes for the intel 7260 for B3 Card.
> http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/?id=e45d3860987a68a4c317e7b6e62bb81ffde8a93b
>
> Try with the above FW and share the results.
>
> Thanks,
> Jaya Praveen G
>
> -----Original Message-----
> From: linux-bluetooth-owner@xxxxxxxxxxxxxxx [mailto:linux-bluetooth-owner@xxxxxxxxxxxxxxx] On Behalf Of Emil Lenngren
> Sent: Wednesday, December 7, 2016 2:05 AM
> To: Bluez mailing list <linux-bluetooth@xxxxxxxxxxxxxxx>
> Subject: BLE bug: Intel Bluetooth 7260 fails to scan and connect concurrently
>
> I recently saw on this mailing list that the intel firmware patches have been updated, so I downloaded the latest firmware to see it being applied on my Asus TP300L computer with Intel Bluetooth 7260:
>
> [ 2044.429868] usb 1-1.4: new full-speed USB device number 8 using ehci-pci [ 2044.524374] usb 1-1.4: New USB device found, idVendor=8087, idProduct=07dc [ 2044.524383] usb 1-1.4: New USB device strings: Mfr=0, Product=0,
> SerialNumber=0
> [ 2044.539193] Bluetooth: hci0: read Intel version: 3707100180012d0d00 [ 2044.539242] Bluetooth: hci0: Intel Bluetooth firmware file:
> intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
> [ 2044.728245] Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated [ 2394.965515] usb 1-1.4: reset full-speed USB device number 8 using ehci-pci [ 2395.072161] Bluetooth: hci0: read Intel version: 3707100180012d0d27 [ 2395.072167] Bluetooth: hci0: Intel device is already patched. patch num: 27
>
> I have a custom application talking HCI directly and according to the LE supported states it supports both scanning and initiating a connection at the same time. But if I start a LE scan and then initiate a connection, it fails with the error code Connection Rejected due to Limited Resources (0x0d). If I however do it the other way around, first starting the connection attempt followed by starting scan, everything works as normal. This is clearly a bug in the firmware so I was just wondering if there were any Intel guys here willing to fix this? I've actually seen the same problem as well on a cheap Android Asus tablet having some Intel bluetooth chip in a snoop log.
>
> This is btmon log where it fails:
>
>
> < HCI Command: Reset (0x03|0x0003) plen 0
>                                       [hci0] 2238.125717
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.138612
>       Reset (0x03|0x0003) ncmd 2
>         Status: Success (0x00)
> < HCI Command: Read Local Version Information (0x04|0x0001) plen 0
>                                       [hci0] 2238.138702
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2238.139583
>       Read Local Version Information (0x04|0x0001) ncmd 1
>         Status: Success (0x00)
>         HCI version: Bluetooth 4.0 (0x06) - Revision 3584 (0x0e00)
>         LMP version: Bluetooth 4.0 (0x06) - Subversion 3584 (0x0e00)
>         Manufacturer: Intel Corp. (2)
> < HCI Command: LE Read Supported States (0x08|0x001c) plen 0
>                                       [hci0] 2238.139624
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2238.140580
>       LE Read Supported States (0x08|0x001c) ncmd 1
>         Status: Success (0x00)
>         States: 0x000000001fffffff
>           Non-connectable Advertising State
>           Scannable Advertising State
>           Connectable Advertising State
>           High Duty Cycle Directed Advertising State
>           Passive Scanning State
>           Active Scanning State
>           Initiating State
>             and Connection State (Master Role)
>           Connection State (Slave Role)
>           Non-connectable Advertising State
>             and Passive Scanning State
>           Scannable Advertising State
>             and Passive Scanning State
>           Connectable Advertising State
>             and Passive Scanning State
>           High Duty Cycle Directed Advertising State
>             and Passive Scanning State
>           Non-connectable Advertising State
>             and Active Scanning State
>           Scannable Advertising State
>             and Active Scanning State
>           Connectable Advertising State
>             and Active Scanning State
>           High Duty Cycle Directed Advertising State
>             and Active Scanning State
>           Non-connectable Advertising State
>             and Initiating State
>           Scannable Advertising State
>             and Initiating State
>           Non-connectable Advertising State
>             and Connection State (Master Role)
>           Scannable Advertising State
>             and Connection State (Master Role)
>           Non-connectable Advertising State
>             and Connection State (Slave Role)
>           Scannable Advertising State
>             and Connection State (Slave Role)
>           Passive Scanning State
>             and Initiating State
>           Active Scanning State
>             and Initiating State
>           Passive Scanning State
>             and Connection State (Master Role)
>           Active Scanning State
>             and Connection State (Master Role)
>           Passive Scanning State
>             and Connection State (Slave Role)
>           Active Scanning State
>             and Connection State (Slave Role)
>           Initiating State
>             and Connection State (Master Role)
>             and Master Role & Master Role < HCI Command: Set Event Mask (0x03|0x0001) plen 8
>                                       [hci0] 2238.140615
>         Mask: 0x2000000000018010
>           Disconnection Complete
>           Hardware Error
>           Flush Occurred
>           LE Meta
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.141588
>       Set Event Mask (0x03|0x0001) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Set Controller To Host Flow Control (0x03|0x0031) plen
> 1                                      [hci0] 2238.141631
>         Flow control: Off (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.142587
>       Set Controller To Host Flow Control (0x03|0x0031) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Read BD ADDR (0x04|0x0009) plen 0
>                                       [hci0] 2238.142628
>> HCI Event: Command Complete (0x0e) plen 10                                                                 [hci0] 2238.143580
>       Read BD ADDR (0x04|0x0009) ncmd 1
>         Status: Success (0x00)
>         Address: 80:19:34:A6:44:B4 (Intel Corporate) < HCI Command: LE Read Buffer Size (0x08|0x0002) plen 0
>                                       [hci0] 2238.143785
>> HCI Event: Command Complete (0x0e) plen 7                                                                  [hci0] 2238.144579
>       LE Read Buffer Size (0x08|0x0002) ncmd 1
>         Status: Success (0x00)
>         Data packet length: 27
>         Num data packets: 7
> < HCI Command: LE Read White List Size (0x08|0x000f) plen 0
>                                       [hci0] 2238.144607
>> HCI Event: Command Complete (0x0e) plen 5                                                                  [hci0] 2238.145573
>       LE Read White List Size (0x08|0x000f) ncmd 1
>         Status: Success (0x00)
>         Size: 32
> < HCI Command: LE Clear White List (0x08|0x0010) plen 0
>                                       [hci0] 2238.145649
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.146580
>       LE Clear White List (0x08|0x0010) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
>                                       [hci0] 2238.146610
>         Type: Passive (0x00)
>         Interval: 11.250 msec (0x0012)
>         Window: 11.250 msec (0x0012)
>         Own address type: Public (0x00)
>         Filter policy: Accept all advertisement (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2238.147569
>       LE Set Scan Parameters (0x08|0x000b) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
>                                       [hci0] 2278.538597
>         Scanning: Enabled (0x01)
>         Filter duplicates: Disabled (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2278.539579
>       LE Set Scan Enable (0x08|0x000c) ncmd 2
>         Status: Success (0x00)
> < HCI Command: LE Add Device To White List (0x08|0x0011) plen 7
>                                       [hci0] 2283.040471
>         Address type: Public (0x00)
>         Address: 80:E4:DA:70:57:6F (OUI 80-E4-DA)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2283.041654
>       LE Add Device To White List (0x08|0x0011) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Create Connection (0x08|0x000d) plen 25
>                                       [hci0] 2283.041752
>         Scan interval: 60.000 msec (0x0060)
>         Scan window: 30.000 msec (0x0030)
>         Filter policy: White list is used (0x01)
>         Peer address type: Public (0x00)
>         Peer address: 00:00:00:00:00:00 (OUI 00-00-00)
>         Own address type: Public (0x00)
>         Min connection interval: 20.00 msec (0x0010)
>         Max connection interval: 25.00 msec (0x0014)
>         Connection latency: 0x0000
>         Supervision timeout: 200 msec (0x0014)
>         Min connection length: 0.000 msec (0x0000)
>         Max connection length: 0.000 msec (0x0000)
>> HCI Event: Command Status (0x0f) plen 4                                                                    [hci0] 2283.042597
>       LE Create Connection (0x08|0x000d) ncmd 1
>         Status: Connection Rejected due to Limited Resources (0x0d)
>
>
>
>
>
> And this is the btmon log where the commands are sent in the other order:
>
>
> < HCI Command: Reset (0x03|0x0003) plen 0
>                                       [hci0] 2639.104712
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.117781
>       Reset (0x03|0x0003) ncmd 2
>         Status: Success (0x00)
> < HCI Command: Read Local Version Information (0x04|0x0001) plen 0
>                                       [hci0] 2639.117842
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2639.118772
>       Read Local Version Information (0x04|0x0001) ncmd 1
>         Status: Success (0x00)
>         HCI version: Bluetooth 4.0 (0x06) - Revision 3584 (0x0e00)
>         LMP version: Bluetooth 4.0 (0x06) - Subversion 3584 (0x0e00)
>         Manufacturer: Intel Corp. (2)
> < HCI Command: LE Read Supported States (0x08|0x001c) plen 0
>                                       [hci0] 2639.118818
>> HCI Event: Command Complete (0x0e) plen 12                                                                 [hci0] 2639.119771
>       LE Read Supported States (0x08|0x001c) ncmd 1
>         Status: Success (0x00)
>         States: 0x000000001fffffff
>           Non-connectable Advertising State
>           Scannable Advertising State
>           Connectable Advertising State
>           High Duty Cycle Directed Advertising State
>           Passive Scanning State
>           Active Scanning State
>           Initiating State
>             and Connection State (Master Role)
>           Connection State (Slave Role)
>           Non-connectable Advertising State
>             and Passive Scanning State
>           Scannable Advertising State
>             and Passive Scanning State
>           Connectable Advertising State
>             and Passive Scanning State
>           High Duty Cycle Directed Advertising State
>             and Passive Scanning State
>           Non-connectable Advertising State
>             and Active Scanning State
>           Scannable Advertising State
>             and Active Scanning State
>           Connectable Advertising State
>             and Active Scanning State
>           High Duty Cycle Directed Advertising State
>             and Active Scanning State
>           Non-connectable Advertising State
>             and Initiating State
>           Scannable Advertising State
>             and Initiating State
>           Non-connectable Advertising State
>             and Connection State (Master Role)
>           Scannable Advertising State
>             and Connection State (Master Role)
>           Non-connectable Advertising State
>             and Connection State (Slave Role)
>           Scannable Advertising State
>             and Connection State (Slave Role)
>           Passive Scanning State
>             and Initiating State
>           Active Scanning State
>             and Initiating State
>           Passive Scanning State
>             and Connection State (Master Role)
>           Active Scanning State
>             and Connection State (Master Role)
>           Passive Scanning State
>             and Connection State (Slave Role)
>           Active Scanning State
>             and Connection State (Slave Role)
>           Initiating State
>             and Connection State (Master Role)
>             and Master Role & Master Role < HCI Command: Set Event Mask (0x03|0x0001) plen 8
>                                       [hci0] 2639.119796
>         Mask: 0x2000000000018010
>           Disconnection Complete
>           Hardware Error
>           Flush Occurred
>           LE Meta
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.120773
>       Set Event Mask (0x03|0x0001) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Set Controller To Host Flow Control (0x03|0x0031) plen
> 1                                      [hci0] 2639.120800
>         Flow control: Off (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.121775
>       Set Controller To Host Flow Control (0x03|0x0031) ncmd 1
>         Status: Success (0x00)
> < HCI Command: Read BD ADDR (0x04|0x0009) plen 0
>                                       [hci0] 2639.121799
>> HCI Event: Command Complete (0x0e) plen 10                                                                 [hci0] 2639.122772
>       Read BD ADDR (0x04|0x0009) ncmd 1
>         Status: Success (0x00)
>         Address: 80:19:34:A6:44:B4 (Intel Corporate) < HCI Command: LE Read Buffer Size (0x08|0x0002) plen 0
>                                       [hci0] 2639.122952
>> HCI Event: Command Complete (0x0e) plen 7                                                                  [hci0] 2639.123772
>       LE Read Buffer Size (0x08|0x0002) ncmd 1
>         Status: Success (0x00)
>         Data packet length: 27
>         Num data packets: 7
> < HCI Command: LE Read White List Size (0x08|0x000f) plen 0
>                                       [hci0] 2639.123803
>> HCI Event: Command Complete (0x0e) plen 5                                                                  [hci0] 2639.124771
>       LE Read White List Size (0x08|0x000f) ncmd 1
>         Status: Success (0x00)
>         Size: 32
> < HCI Command: LE Clear White List (0x08|0x0010) plen 0
>                                       [hci0] 2639.124829
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.125780
>       LE Clear White List (0x08|0x0010) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7
>                                       [hci0] 2639.125824
>         Type: Passive (0x00)
>         Interval: 11.250 msec (0x0012)
>         Window: 11.250 msec (0x0012)
>         Own address type: Public (0x00)
>         Filter policy: Accept all advertisement (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2639.126797
>       LE Set Scan Parameters (0x08|0x000b) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Add Device To White List (0x08|0x0011) plen 7
>                                       [hci0] 2677.822165
>         Address type: Public (0x00)
>         Address: 80:E4:DA:70:57:6F (OUI 80-E4-DA)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2677.822857
>       LE Add Device To White List (0x08|0x0011) ncmd 1
>         Status: Success (0x00)
> < HCI Command: LE Create Connection (0x08|0x000d) plen 25
>                                       [hci0] 2677.822939
>         Scan interval: 60.000 msec (0x0060)
>         Scan window: 30.000 msec (0x0030)
>         Filter policy: White list is used (0x01)
>         Peer address type: Public (0x00)
>         Peer address: 00:00:00:00:00:00 (OUI 00-00-00)
>         Own address type: Public (0x00)
>         Min connection interval: 20.00 msec (0x0010)
>         Max connection interval: 25.00 msec (0x0014)
>         Connection latency: 0x0000
>         Supervision timeout: 200 msec (0x0014)
>         Min connection length: 0.000 msec (0x0000)
>         Max connection length: 0.000 msec (0x0000)
>> HCI Event: Command Status (0x0f) plen 4                                                                    [hci0] 2677.823814
>       LE Create Connection (0x08|0x000d) ncmd 2
>         Status: Success (0x00)
> < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2
>                                       [hci0] 2686.689549
>         Scanning: Enabled (0x01)
>         Filter duplicates: Disabled (0x00)
>> HCI Event: Command Complete (0x0e) plen 4                                                                  [hci0] 2686.690890
>       LE Set Scan Enable (0x08|0x000c) ncmd 2
>         Status: Success (0x00)
> --
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