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Bug#878165: firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction

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  Bug#878165: firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction Tony Houghton <h@realh.co.uk> - 2017-10-13 01:10 +0200
    Bug#878165: firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction Antonio Trueba Gayol <atgayol@gmail.com> - 2017-12-02 20:40 +0100
    Bug#878165: Fix upstream Alejandro Lorenzo Gallego <alejandro_aero@yahoo.es> - 2017-12-13 00:50 +0100
      Bug#878165: Fixed upstream, update package Antonio Trueba Gayol <atgayol@gmail.com> - 2018-07-08 09:30 +0200
    Bug#878165: marked as done (firmware-iwlwifi: Some firmware  versions cause 8260 Bluetooth malfunction) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-03-14 16:40 +0100

#59175 — Bug#878165: firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction

Package: firmware-iwlwifi
Version: 20170823-1
Severity: normal

I have a 4th generation Lenovo Thinkpad Carbon X1 with Intel 8260
wifi/bluetooth:

04:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
	Subsystem: Intel Corporation Wireless 8260 [8086:1130]
	Flags: bus master, fast devsel, latency 0, IRQ 130
	Memory at f1100000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

When trying to use my bluetooth mouse yesterday, I couldn't get it to
connect successfully. I tried again today, and after a lot of hassle
turning Bluetooth on and off in GNOME and pressing the mouse's connect
button it connected. But it only worked for a short time, about a
minute, then the mouse stopped working even though the BT config said it
was connected. This kept happening each time I reconnected.

I've replaced the package with 20161130-3 from stable, and bluetooth
seems to work correctly with this older firmware. But I had the same
problem a few months ago (which I commented on at a now closed bug
<https://bugzilla.kernel.org/show_bug.cgi?id=190831>) with kernel
4.9.6-3 and firmware-iwlwifi 20161130-2, so it seems like something that
was changed between 20161130-2 and -3 cured this problem, but it has now
regressed.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

firmware-iwlwifi depends on no packages.

firmware-iwlwifi recommends no packages.

Versions of packages firmware-iwlwifi suggests:
ii  initramfs-tools  0.130

-- no debconf information

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#59533

Package: firmware-iwlwifi
Version: 20170823-1
Followup-For: Bug #878165

Hi,

I can confirm this bug, it's root cause seems to be interference between 2.4GHz
wifi and bluetooth.

In my case, I have 2 wifi networks in range, one in 5GHz range and the other in
2.4GHz range. My main network is the 5GHz one, and while connected to it
there's no problem with my bluetooth mouse. However, from time to time the
laptop roams to the 2.4GHz one and there appears the interference.

With firmware-iwlwifi's version 20170823-1 (which contains firmware v31 of
iwlwifi-8000C), the bluetooth mouse is inmediately disconnected and the only
way to reconnect is to reboot the laptop. Note that connecting back to the 5GHz
network doesn't solve the problem, it seems that the bluetooth stack somehow
gets stuck.

On the other hand, version 20161130-3 contais v28 of the firmware. In this
case, connecting to a 2.4GHz network causes some interference with the mouse
(mainly erratic movements), but after completing the connection both radios can
coexist (although there is some interference from time to time). Connecting
back to 5GHz restores everything to normal.

There's a newer version (v34) of the firmware in the kernel's github, but
unfortunately current Debian's kernel doesn't support it.

For the time being, it seems that our best solution is to force loading v28 of
the firmware, either by:
- downgrading firmware-iwlwifi to 20161130-3 or
- manually removing /lib/firmware/iwlwifi-8000C.ucode-31.ucode, so the system
will fall back to v28 instead or
- somehow instruct the kernel to prefer v28 over v31, but I don't know if that
can be done

Regards.



-- System Information:
Debian Release: buster/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=es_ES.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8), LANGUAGE=es_ES.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

firmware-iwlwifi depends on no packages.

firmware-iwlwifi recommends no packages.

Versions of packages firmware-iwlwifi suggests:
ii  initramfs-tools  0.130

-- no debconf information

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#59637 — Bug#878165: Fix upstream

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Maybe this is related to kernel bug 197147. If you are running kernel 4.14 you 
are almost guaranteed to have hit it.

The intel team has confirmed there is a problem in the BT firlwamre and have 
published updated firmware that fixes the problem (at least for me). 

So basically, upstream has fixed the issue. In the discussion ( https://
bugzilla.kernel.org/show_bug.cgi?id=197147 ) theree is a .tar.gz with thd new 
firmware files that should be copied to /lib/firmware/intel 

Give it a try, and if it fixes it, the package mantainer should consider, 
please, updating to the latests firmware 

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#61362 — Bug#878165: Fixed upstream, update package

Hi,

It seems this bug is gone with kernel version 4.16.0-2 and firmware
iwlwifi-8000C v36.

Please consider updating the firmware version in this package.


Regards.

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#69813 — Bug#878165: marked as done (firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction)

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Your message dated Sun, 14 Mar 2021 16:26:53 +0100
with message-id <YE4rPZZG6S8SpgQC@photino.stro.at>
and subject line Re:  firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction
has caused the Debian Bug report #878165,
regarding firmware-iwlwifi: Some firmware versions cause 8260 Bluetooth malfunction
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
878165: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878165
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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