I can't seem to get CUDA 11.5 to work Ubuntu 20.04 + Nvidia 470 driver + Geforce GTX Titan. After installing this CUDA version and rebooting, a dual monitor system becomes reduced to a single monitor system with a low resolution of 1920x1080 only. Also, a non-Nvidia driver seems to be installed.
I have checked that such a system can be installed with CUDA 11.4, everything works fine with this CUDA version.
Is CUDA 11.5 compatible with Ubuntu 20.04 + Nvidia 470 driver + Geforce GTX Titan?
terminal
donvidia-smi
and look in the top-right corner, and it'll tell you what version of cuda is supported (not if it's installed or not). I suspect that yours will say 11.4. Confirm that "Secure Boot" is disabled in your BIOS. Go toSoftware & Updates
Additional Drivers tab, and note which driver is selected there. Change if need be.apt purge
to totally remove CUDA 11.5 and then NIDIA , reboot, and reinstall NVIDIA driver as per your description to recover my display. Also, I write this here to help other users encountering the same issue as I have to recover their display.