I'm experiencing the same issue as the OP. Here is the requested 'pevboot.txt'. It's happening for me multiple times during the week - I'd say two to three times a week on Ubuntu 19.10.
gnome-shell 3.34.3-1ubuntu1~19.10.1 nvidia-driver-440 440.59-0ubuntu0~0.19.10.1 Linux 5.3.0-40-generic #32-Ubuntu SMP Fri Jan 31 20:24:34 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux ** Attachment added: "prevboot.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1855938/+attachment/5332695/+files/prevboot.txt -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1855938 Title: [nvidia] Screen freezes and only mouse moves To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1855938/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
