Thank you for your suggestion. I was using driver version 440 when desktop freezing first started. I disabled all power savings, adjusted the nvidia gpu performance to maximum and upgraded the driver to latest stable version based on user experiences and recommendations in various forums.
I didn't paid attention to exactly after which action this problem started, it was a mistake of mine. I'm constantly updating my system. i suspect it started after a new kernel update. I've downgraded the driver upon your suggestion. I still have all power savings disabled and gpu performance adjusted to maximum. I'll observe and update this issue in case desktop freezing continues. Meanwhile I attached a video showing the freezing instant. Desktop freezes like this, keyboard and mouse become unresponsive, sound of playing media file continues to be heard for a while. ** Attachment added: "Desktop freezing instant" https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450/+bug/1894454/+attachment/5408976/+files/MOV_0234.mp4 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894454 Title: [nvidia] Screen freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450/+bug/1894454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs