Linux - OpenGL applications exit with an error message like Error: Could not open...

Updated 09/29/2021 09:52 AM

OpenGL applications exit with the following error message:

 

Error: Could not open /dev/nvidiactl because the permissions

are too restrictive.  Please see the FREQUENTLY ASKED QUESTIONS

section of /usr/share/doc/NVIDIA_GLX-1.0/README for steps

to correct.


It is likely that a security module for the PAM system may be changing the permissions on the NVIDIA device files. In most cases this security system works, but it can get confused. To correct this problem it is recommended that you disable this security feature. Different Linux distributions have different files to control this; please consult with your distributor for the correct method of disabling this security feature. As an example, if your system has the file /etc/security/console.perms then you should edit the file and remove the line that starts with "<dri>" (we have also received reports that additional references to <dri> in console.perms must be removed, but this has not been verified by NVIDIA). If instead your system has the file /etc/logindevperms then you should edit the file and remove the line that lists /dev/nvidiactl. The above steps will prevent the PAM security system from modifying the permissions on the NVIDIA device files. Next, you will need to reset the permissions on the device files back to their original permissions and owner. You can do that with the following commands:

chmod 0666 /dev/nvidia* chown root /dev/nvidia*

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