Bug#906733: linux-image-4.17.0-3-amd64: Lenovo QCA9565 / AR9565 Wireless Network Adapter - Bluetooth fails

[Stefano Callegari <ste.callegari@tiscali.it>]

Il Mon, Aug 20, 2018 at 01:10:35PM +0200, To Debian Bug Tracking System scrisse:
> Package: src:linux
> Version: 4.17.15-1
> Severity: normal
> 
> Dear Maintainer,
> 
> I'm one of the "lucky" owner of a Lenovo G50 who have the bluetooth
> 
>   Bus 002 Device 005: ID 0cf3:3004 Atheros Communications, Inc. AR3012
> Bluetooth 4.0
> 
> As reported here https://askubuntu.com/questions/1032417/ubuntu-18-04-lts-
> bluetooth-0cf33004-discovery-not-working, "The problem is that Atheros has
> released a new ROME device using the same VID/PID as an older AR3012 device.
> The codes are [0cf3:3004].", so the last kernel with the bluetooth that is
> working fine for me is the linux-image-4.15.0-2-amd64 (4.15.11-1).
> 
> In no 4.17 series the bluetooth works (it loads the firmware of the ROME
> device) until yesterday morning with the linux-image-4.17.0-3-amd64 (4.17.15-1)
> when the bluetooth has worked again.
> 
> But yesterday afternoon a new updtate (4.17.17-1) has killed again the
> bluetooth.
> 
> When I came back to 4.17.15-1, the bluetooth still work again.
> 
> Which is the kernel "wrong", the 4.17.15-1 or the 4.17.17-1?
> 
> Thanks
> 

Hi,

more news.

This morning the bluetooth (ever with kernel 4.17.15-1) is missing again.

So I had remembered that when I run an update that calls initramfs, the
bluetooth at the new boot doesn't work, so first I have to do a reboot to
run

update-initramfs -uk all && update-grub2 && grub-install

then reboot again and the bluetooth works.

So I have done the above procedure and the bluetooth has worked again.

But I had a dubt: may the problem with the last kernel be the same?

Again:
- updated the kernel to 4.17.17-1;
- rebooted;
- update-initramfs -uk all && update-grub2 && grub-install;
- rebooted;
- bluetooth works with kernel 4.17.17-1 too.

I had reported a similar bugs (Bug#814508: initramfs-tools: bluetooth/hci
fails) time ago and I think are related, the real problem is initramfs.

Thanks
-- 
Stefano Callegari