Ubuntu 22.04 graphics problems

[antonio715]

hi there,

three days ago i started my ubuntu 22.04 laptop and got a very awfull message:
systemd-logind[762]: failed to idle channel 2 [systemd-logind[762]]
after restarting i got to enter but since then i have many graphics problems: the screen blinks, something like interferences, one second, sometimes almost shut down the image
i tried to update the nvidia driver to 550 but the problem continues
it happens many times when the mouse is near the border of the screen (botton or right usually)

does someone know something about this problem?

Thanks in advance and sorry for my horrible english

Ps: under Windows i have not problems... only Ubuntu