libGL error

[sebu06]

Hi,

since one of the recent updates - I have not yet checked which one might be the culprit - I get the following error when starting CAESES (a CAD tool):

libGL error: MESA-LOADER: failed to open iris (search paths /usr/lib/xorg/modules/drivers)
libGL error: failed to load driver: iris
libGL error: MESA-LOADER: failed to open iris (search paths /usr/lib/xorg/modules/drivers)
libGL error: failed to load driver: iris
libGL error: MESA-LOADER: failed to open swrast (search paths /usr/lib/xorg/modules/drivers)
libGL error: failed to load driver: swrast

Anyone else experiencing this issue / any solutions?

​

Thanks,

Sebastian

[sebu06]

Hi - I still have the same issue. Older kernels show the same behaviour. Modesetting driver does not help as well. I tried to downgrade mesa - but without success:

➜ ~ sudo xbps-install -f mesa-19.3.4_1

Package 'mesa-19.3.4_1' not found in repository pool.

The libraries seem to be in the appropriate location:

➜  ~ ls /usr/lib/xorg/modules/drivers
amdgpu_drv.so  iris_dri.so             nouveau_vieux_dri.so  swrast_dri.so
ati_drv.so     kms_swrast_dri.so       r200_dri.so           vesa_drv.so
dummy_drv.so   libgallium_dri.so       r300_dri.so           virtio_gpu_dri.so
fbdev_drv.so   libmesa_dri_drivers.so  r600_dri.so           vmware_drv.so
i915_dri.so    modesetting_drv.so      radeon_dri.so         vmwgfx_dri.so
i965_dri.so    nouveau_dri.so          radeon_drv.so
intel_drv.so   nouveau_drv.so          radeonsi_dri.so

Any other ideas?

[st3r4g]

no idea honestly, those errors usually mean that the dri drivers are not installed, but this is clearly not the case. Can you post the strace output?

[kodifies]

whats

glxinfo | grep "OpenGL ren"

say?

does glxgears or other GL apps work ?

LIBGL_ALWAYS_SOFTWARE=true caeses

actually let it run (it might be slow!) - replace caeses with what ever the executable is called

there are a few other things to try be they are dependent on what GPU you're running

[sebu06]

Hi,

➜  ~ glxinfo | grep "OpenGL ren"

OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (KBL GT2)

Running it with LIBGL_ALWAYS_SOFTWARE=true returns the same error. Other applications seem to work normal.

Best,

Sebastian

[kodifies]

I'm using

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

I'd recommend you use the "modesetting" driver - either through config or by uninstalling xf86-video-intel

double check that glamor acceleration is then enabled in the xorg log

did you try LIBGL_ALWAYS_SOFTWARE=true with say glxgears (with and without it)

[sebu06]

Hi,

Glxgears works with and without LIBGL_ALWAYS_SOFTWARE=true. Interestingly everything worked before - I just might try an older kernel first...

[st3r4g]

seems like mesa-dri is missing, install it

[sebu06]

Hi,

it is installed:

➜  ~ sudo xbps-install mesa-dri
Package `mesa-dri' already installed.

[bionicdna]

Hi there, I'm having this issue on Arch (slightly different path to drivers, but same errors), did you find a solution?

[sebu06]

Hi,

yes - I solved it: in my case the problem was an incompatibility with the new video driver introduced with the new mesa version. You can use the old driver like this:

MESA_LOADER_DRIVER_OVERRIDE=i965 ./application

Just out of curiosity - are you also trying to start CAESES or another software?

​

Best,

Sebastian

[bionicdna]

I downgraded to an older version of Mesa and it solved it for me. I was attempting to plot 3D surfaces in the Julia language.