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

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Mark Haun [haunma@xxxxxxxxx] wrote:
> 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).

Mark
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