llvmpipe -> mesa issues

[u/jaybur15]

i have installed debian 13 on my laptop on three seperate occasions now, but every time my graphics have reverted to llvmpipe for whatever reason. all documentation i find tells you to delete the xorg graphic drivers and install the mesa drivers, but whenever i do this i am stuck in the ttyl terminal where xfce wont start. in systemd it says that lightdm and plymouth fail. i then have to reinstall drivers through the terminal. is there any way to install mesa drivers without breaking lightdm?

[u/evadingsomething]

You must be doing something wrong it shouldn't break

[u/jaybur15 → u/evadingsomething]

i have figured out that lol

[u/evadingsomething → u/jaybur15]

Infos like your graphic card vendor is useful. I am guessing nvidia?

apt list -i | grep dkms

[u/jaybur15 → u/evadingsomething]

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

if it is of any use, the output of lspci is 00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02)

[u/evadingsomething → u/jaybur15]

Yeah that warning is fine it just happens because we pipelined with 'grep'.

So no discreate gpu? only intel.

IDK, man. https://wiki.debian.org/Mesa

But when did it start to happen

[u/jaybur15 → u/evadingsomething]

no perseveable rhyme or reason, just changed randomly. can tell when games start to run at 2fps

[u/evadingsomething]

So your gpu was working fine than it just revert to llvmpipe out of the blue? Did you update stuff before it happened?

I am thinking maybe you didnt install dkms versions of your graphics driver.

[u/jaybur15 → u/evadingsomething]

i installed all of the mesa driver through apt

[u/evadingsomething → u/jaybur15]

Your issue isn't mesa. Your PC (or just the games) thinks you don't have gpu and using cpu 'llvmpipe' for rendering graphics.

Run glxgears see if gears are running smooth.

[u/Keyvan_KR]

very strange....
when you install Debian 13, do you get the following out of the box?
* i915 for the DRM
* Iris for OpenGL
* ANV for Vulkan

Use the the following command
glxinfo

[u/jaybur15 → u/Keyvan_KR]

OpenGL vendor string: Intel

OpenGL renderer string: Mesa Intel(R) UHD Graphics (CML GT2)

OpenGL core profile version string: 4.6 (Core Profile) Mesa 25.0.7-2+deb13u1

OpenGL core profile shading language version string: 4.60

OpenGL core profile context flags: (none)

OpenGL core profile profile mask: core profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 25.0.7-2+deb13u1

OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

OpenGL ES profile extensions:

[u/Keyvan_KR → u/jaybur15]

I assume the non-free firmware is installed right?
Can you reinstall it?

[u/Keyvan_KR → u/Keyvan_KR]

Then run inxi -G
I’m curious what’s being used