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-X, which is subscribed to xserver-xorg-video-nouveau in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
