Re: Intel 7260 spontaneous USB disconnect/reconnect every 23h18m07s

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Hi Mark,

>> Took me a while to figure out you have to bring down the hci0 interface and
>> stop bluetoothd before running bluemoon.  Otherwise I get "Failed to open
>> HCI user channel."  So now when I run bluemoon -T it just sits there forever
>> after the welcome message.  Is this expected behavior?  Should I then
>> restart bluetoothd in another console and leave the whole thing for a couple
>> of days to catch the USB disconnect?
> 
> Ok, I think I am seeing a bug very similar to this one reported by Loic
> Poulain:
> 
> http://marc.info/?l=linux-bluetooth&m=143220351521634&w=2
> ("bluetooth-next HCI user channel issue")
> 
> I have the same symptom of bluemoon hanging, and I figured out that I can
> recover the system without rebooting by forcing hci0 down again.  "hciconfig
> hci0 down" takes about ten seconds to return, and then I have a 0xfc3f
> timeout in dmesg:
> 
> [ 5563.562554] Bluetooth: hci0 command 0xfc3f tx timeout
> [ 5571.557618] Bluetooth: hci0: turning off Intel device LED failed (-110)
> 
> This is the same error Loic was getting, I assume because the commit in
> question has now made it into my kernel (4.2.0-rc4).

there are patches in 4.2-rc8 at least that should avoid this issue in combination with HCI User Channel. If this is still an issue, then we need to fix this.

Regards

Marcel

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