I eventually contacted Dell support and was sent a new GM107GL graphics card (under extended warranty). Double improvement: * no more freezing (fingers crossed), * much less noise from the workstation (although I had cleaned the fan with compressed air).
It looks like a hardware issue, the graphics card really had been defective from the start. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917037 Title: Frozen screen (NVidia GM107 card with large 3840 × 2160 screen) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1917037/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
