Since decemeber, my graphics card (GTX 570) compostier wasnt working. I had time this morning to troubleshoot the issue and couldnt find anything on manjaros site but did find somethings on arch (i cant post links).
Key identifier in /var/log/Xorg.0.log
16.042] (EE) NVIDIA(0): Failed to initialize the GLX module; please check in your X
[ 16.042] (EE) NVIDIA(0): log file that the GLX module has been loaded in your X
[ 16.042] (EE) NVIDIA(0): server, and that the module is the NVIDIA GLX module. If
[ 16.042] (EE) NVIDIA(0): you continue to encounter problems, Please try
[ 16.042] (EE) NVIDIA(0): reinstalling the NVIDIA driver.
You can see that it is loading the wrong glx module here (it should be using the one in /usr/lib/nvidia/xorg)
[ 4.473] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 4.483] (II) Module glx: vendor="X.Org Foundation"
[ 4.483] compiled for 1.20.10, module version = 1.0.0
[ 4.483] ABI class: X.Org Server Extension, version 10.0
In my case I updated /etc/X11/xorg.conf to add in the section
Section "Files"
ModulePath "/usr/lib/nvidia/xorg"
ModulePath "/usr/lib/xorg/modules"
EndSection
And added into the /usr/share/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf
Section "OutputClass"
Identifier "nvidia"
MatchDriver "nvidia-drm"
Driver "nvidia"
ModulePath "/usr/lib/nvidia/xorg"
ModulePath "/usr/lib/xorg/modules"
EndSection
Now the log files shows the correct module is loaded
[ 4.448] (II) LoadModule: "glx"
[ 4.450] (II) Loading /usr/lib/nvidia/xorg/libglx.so
[ 4.512] (II) Module glx: vendor="NVIDIA Corporation"
[ 4.512] compiled for 4.0.2, module version = 1.0.0
[ 4.512] Module class: X.Org Server Extension
[ 4.512] (II) NVIDIA GLX Module 390.141 Mon Dec 28 16:17:40 UTC 2020
[ 4.513] (II) LoadModule: "nvidia"
[ 4.514] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[ 4.520] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 4.520] compiled for 4.0.2, module version = 1.0.0
[ 4.520] Module class: X.Org Video Driver
Hope this helps someone else
Nz