Failed to load module "glx" (module does not exist, 0)

[ricemaker1]

When I run glxgears, the system reports an error: Error: couldn’t get an RGB, Double-buffered visual.
I encounter the same issue when running glxheads and glxinfo.
I checked the Xorg.0.log and found that the glx module fails to load.

root@p3737-0000-p3701-0005:/usr/lib/xorg/modules/extensions# cat /var/log/Xorg.0.log | grep -i glx
[    10.817] (II) LoadModule: "glx"
[    10.832] (WW) Warning, couldn't open module glx
[    10.832] (EE) Failed to load module "glx" (module does not exist, 0)
[    10.873] (II) Initializing extension GLX

I don’t find libglx.so in the /usr/lib/xorg/modules/extensions/ directory; only libglxserver_nvidia.so exists in this directory.
My machine is Jetson AGX Orin.
I’m not familiar with graphics display. Can I get some help?

[elsaco]

You have the Nvidia glx driver (libglxserver_nvidia.so). Try making a symlink to it so your X server would load it:

/usr/lib/xorg/modules/extensions/libglx.so pointing to /usr/lib/xorg/modules/extensions/libglxserver_nvidia.so

[aplattner]

The driver doesn’t replace the X server’s libglx.so anymore, so that module should come from your distribution’s Xorg packages. libglxserver_nvidia.so is a separate file.

I’m not very familiar with the Jetson AGX Orin OS images so I’m not sure offhand how to find what package is supposed to provide that file, but I think apt-file search should be able to find it.

[elsaco]

If the Jetson AGX Orin is using the same Ubuntu based OS image as the Jetson Nano, the libglx.so is provided by the xserver-xorg-core package.

From Xorg.0.log file on a Jetson Orin Nano:

[    23.155] (II) "glx" will be loaded by default.
[    23.155] (II) LoadModule: "glx"
[    23.156] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[    23.183] (II) Module glx: vendor="X.Org Foundation"
[    23.267] (II) Loading sub module "glxserver_nvidia"
[    23.267] (II) LoadModule: "glxserver_nvidia"
[    23.267] (II) Loading /usr/lib/xorg/modules/extensions/libglxserver_nvidia.so
[    23.728] (II) Module glxserver_nvidia: vendor="NVIDIA Corporation"

[ricemaker1]

Yes, when I use xorg’s libglx.so, the system can load it normally and the functionality is working properly. When using libglxserver_nvidia.so, according to the module loading logs, there are no errors either, but I haven’t tested whether the functionality is fully correct.

[ricemaker1]

I tried creating a symbolic link from libglx.so to libglxserver_nvidia.so, and after testing, the functionality is normal—applications like glxgears run correctly. Unlike other products, on the Jetson AGX Orin, libglxserver_nvidia.so should still be able to replace Xorg’s libglx.so.