Re: Nouveau on Quadro K2200, killed?

On Fri, Jun 19, 2026 at 10:00 AM Felix Miata <[email protected]> wrote:
>
> Boyan Penkov composed on 2026-06-19 07:56 (UTC-0400):
>
> > On stable, I see:
> > ```
> > [Fri Jun 19 07:48:12 2026] nouveau 0000:0c:00.0: fifo: SCHED_ERROR 0a
> > [CTXSW_TIMEOUT]
> > [Fri Jun 19 07:48:12 2026] nouveau 0000:0c:00.0:
> > fifo:000000:0006:[Xorg[2222]] rc scheduled
> > [Fri Jun 19 07:48:12 2026] nouveau 0000:0c:00.0: fifo:000000: rc scheduled
> > [Fri Jun 19 07:48:12 2026] nouveau 0000:0c:00.0:
> > fifo:000000:0006:0006:[Xorg[2222]] errored - disabling channel
> > [Fri Jun 19 07:48:12 2026] nouveau 0000:0c:00.0: systemd-logind[1146]:
> > channel 6 killed!
> > ```
> > ...and then the screen restarts and kills all my windows.
>
> > This had happened before, but just happend while I was sitting at the
> > machine just now, so I was able to look.
>
> > Any ideas?  firmware-nvidia-graphics and xservers-xorg-video-nouveau
> > are installed, firmware-nvidia-gps is not (but the k2200 does not have
> > a GSP).
>
> Try purging xserver-xorg-video-nouveau (upstream name xf86-video-nouveau), which
> provides the reverse-engineered, old technology, "experimental", nouveau Xorg
> display driver. Removal will allow use of the newer technology default display
> driver "modesetting", as shown by inxi below in Trixie and my K2200.

Super -- thanks kindly for the suggestion!  It was indeed installed
automatically, as a dependecy of xserver-xorg-video-all, which we
might want to re-evaluate.

>
> # pinxi -GSaz --za --hostname
> System:
>   Host: gb970 Kernel: 6.12.85+deb13-amd64 arch: x86_64 bits: 64 compiler: gcc
>     v: 14.2.0 clocksource: tsc avail: hpet,acpi_pm
>     parameters: root=LABEL=<filter> ipv6.disable=1 net.ifnames=0
>     plymouth.enable=0 noresume consoleblank=0 mitigations=off
>   Desktop: TDE (Trinity) v: R14.1.6 tk: Qt v: 3.5.0 wm: Twin v: 3.0
>     with: kicker vt: 7 dm: 1: TDM 2: XDM Distro: Debian GNU/Linux 13 (trixie)
> Graphics:
>   Device-1: NVIDIA GM107GL [Quadro K2200] vendor: Hewlett-Packard
>     driver: nouveau v: kernel non-free: 550-580.xx+ status: current (as of
>     2025-11; EOL~2026-12-xx) arch: Maxwell code: GMxxx process: TSMC 28nm
>     built: 2014-2019 pcie: gen: 2 speed: 5 GT/s lanes: 16 ports:
>     active: DP-1,DP-2,DVI-I-1 empty: none bus-ID: 01:00.0 chip-ID: 10de:13ba
>     class-ID: 0300 temp: 52.0 C
>   Display: x11 server: X.Org v: 21.1.16 compositor: Twin v: 3.0 driver: X:
>     loaded: modesetting...

Interestingly, even before above, I was in modesetting, so I'm not
sure here, but will keep an eye out...

```
  Display: x11 server: X.Org v: 21.1.16 with: Xwayland v: 24.1.6
    compositor: gnome-shell driver: X: loaded: modesetting unloaded: fbdev,vesa
    dri: nouveau gpu: nouveau display-ID: :0 screens: 1
```

Cheers!

> --
> Evolution as taught in public schools is, like religion,
>         based on faith, not based on science.
>
>  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
>
> Felix Miata
>


-- 
Boyan Penkov