Hi, I've been able to continue my investigation and I can confirm that I am getting the same results on both Linux kernel: - 4.4 - linux-image-4.4.0-1-amd64 from Debian (v4.4.2-3) - 4.5 rc4 - linux-image-4.5.0-rc4-amd64 from Debian (4.5~rc4-1~exp1) and in both cases no error message whatsoever related to Bluetooth. It seems this BCM4324(1) rev B5 chipset is not initialized from a Bluetooth point of view, while working great for Wi-Fi. I've seen recent patches adding support for some devices simply by adding their respective ACPI ID in hci_bcm.c (BCM2E7C for MacBook 2015, BCM2E65 for the Asus T100TAF, BCM2E54 for the HP Omni 10) so I've just taken a look at the data listed by the ACPI subsystem on this tablet: $ ls /sys/bus/acpi/devices/BCM* -d1 /sys/bus/acpi/devices/BCM2E3C:00 /sys/bus/acpi/devices/BCM2E55:00 Neither of these 2 IDs (BCM2E3C, BCM2E55) is listed in hci_bcm.c. It's just a guess at this stage but could one of these be the missing element required in hci_bcm.c to initialize Bluetooth on the Lenovo ThinkPad 8 Tablet maybe? I don't know if the following commands might give a hint to filter between the two IDs: $ cat /sys/bus/acpi/devices/BCM2E3C\:00/status 0 $ cat /sys/bus/acpi/devices/BCM2E55\:00/status 15 If I can provide more information that would be useful for you, feel free to ask as I would be glad to help. Jérôme P.S. I don't know if I should provide a binary firmware somehow to trigger its initialization (as I've done for the Wi-Fi part) but I would expect to see an error message complaining not to find the required binary file if that was the case. 2016-02-22 10:17 GMT+01:00 Arend Van Spriel <arend.vanspriel@xxxxxxxxxxxx>: > + Ilya > + bt list > > On 21-2-2016 15:17, Jérôme de Bretagne wrote: >> Hi, >> >> Since a commit from last April, the BCM4324(1) rev B5 chipset is >> supported in the Linux kernel and WiFi networking has been working >> like a charm on a Lenovo ThinkPad 8 tablet (running Linux >> 4.3.0-1-amd64 from Debian). A big "Thanks" for that. >> >> On the other hand, the Bluetooth part doesn't show up at all (empty >> result with hciconfig) and doesn't seem active with that same 4.3 >> kernel. I don't even see any error message in dmesg about Bluetooth. >> >> bluetooth/btbcm.c mentions quite a few chipsets (UART/USB) but not the >> 4324 rev B5 so I'm not sure of the current Bluetooth status for that >> specific one. Is this chipset enabled for Bluetooth starting with >> Linux 4.4 or in the coming 4.5 version maybe? I couldn't check 4.4 >> properly yet as this kernel version locks currently on my tablet (for >> other reasons). >> >> If it is not fully supported yet, feel free to ask any info that could >> help enable Bluetooth for this chipset on the ThinkPad 8 tablet! >> >> Thanks, >> >> Jérôme >> >> >> P.S. I guess the following page >> https://wireless.wiki.kernel.org/en/users/Drivers/brcm80211 could be >> updated to show that Wireless LAN is properly working. > -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
