It sounds like something is crashing or spinning. Also the attached Xorg logs seem to be from 2019, which is confusing. So those should be ignored... Please:
1. Run this command: journalctl -b0 > journal.txt and attach the resulting text file here. 2. Follow these instructions to check for crashes: https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment ** Tags added: nvidia ** Summary changed: - (1) video hangs or (2) screen goes blank and case fan turns on + [nvidia] (1) video hangs or (2) screen goes blank and case fan turns on ** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-455 (Ubuntu) ** Changed in: nvidia-graphics-drivers-455 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1909352 Title: [nvidia] (1) video hangs or (2) screen goes blank and case fan turns on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-455/+bug/1909352/+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