New nvidia gpu and now login loop

Support & Help Requests
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#1

Hi
I have a desktop running Mate 20.04, grub version is 2.04. It is an AMD system with 2 nvme M.2s, 2 SSDs, a 3700x, x570 board, 2 screens, a new rtx3050 and has 2 user profiles.

The 3050 is to replace a 750ti, however I am having problems getting it to work. I have found the nvidia-driver-510 (propriety, tested) gets me graphics on both screens but I am then faced with a login loop.

I tried the recovery mode screen and found that the current version (linux 5.13.0-35-generic) just went to the login page as expected.
The earlier version (linux 5.13.0-30-generic) login worked (with those huge icons) so I created a test new user and restarted. Unfortunately although the new user is now on the login screen, all login attempts result in the same login loop.

I have also confirmed that .Xauthority and /tmp permissions are set to the user (not root).

Any assistance with this login loop would be appreciated

#2

My suggestion is to revert the graphics to nouveau driver, reboot, then you can install the appropriate nvidia driver. Swapping cards on the fly never worked for me. I always take it back to nouveau, reboot, and then install nvidia driver for the new gpu.

#3

Thanks for the reply and the usefull suggestion

Regards
Bob