Re: new video card broke X

Eben King composed on 2026-06-28 14:43 (UTC-0400):

> I recently got a new-to-me video card:
> 00:1f.3 Multimedia audio controller: Intel Corporation 100 Series/C230 
> Series Chipset Family HD Audio Controller (rev 31)

> There is also the onboard hardware:
> 00:02.0 Display controller: Intel Corporation HD Graphics 530 (rev 06)

# grep framebuffer /var/log/Xorg.0.log
[     6.774] (==) modeset(0): Depth 24, (==) framebuffer bpp 32
#
That's as many such lines as should be expected. Your Xorg.0.log has mainly bad
ones, showing (EE), something clearly wrong that X should be trying to use
framebuffer.

What you should see that is missing includes the following (from a Trixie boot).
/var/log/Xorg.0.log:[     4.096] (II) xfree86: Adding drm device (/dev/dri/card0)
/var/log/Xorg.0.log:[     4.152] (II) modeset(0): using drv /dev/dri/card0

The absence of required firmware can produce their absence.

In your OP, I spotted nothing to tell us anything about your "new" GPU, only the
onboard Intel 530. How about sharing better information:

	inxi -GSaz --vs --za
	dpkg -l | grep -E 'mwar|xorg-video'
	lsmod | sort | grep -E 'video|amdgpu|radeon|i915'

Also, if there are any .conf files remaining in /etc/X11/ or
/etc/X11/xorg.conf.d/, rename or delete them all, unless there is one for only
keyboard you can keep it. Intel and AMD GPU users normally don't need anything in
/etc/X11/ for GPU. By default, there is nothing there.

Make sure xserver-xorg-video-amdgpu is installed if your new dGPU is AMDGPU. If
your "new" GPU is actually old, or if it's too new, it may require one or more
kernel cmdline options.

Don't try to use both motherboard graphics connectors and dGPU connectors at the
same before you get the problem sorted. Generally it can be done with suitable
BIOS config and manual config, but if your "new" dGPU is truly new, you don't want
your OS to see the 530. Stick to dGPU connectors at least for now.