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
