Thanks. It looks like the last kernel message is one from the Nvidia driver, but I can't tell if it's an error or just informational:
[ 871.681257] NVRM: GPU at PCI:0000:01:00: GPU-7eba71ac-fd71-c5c9-f569-09f6406e66c7 [ 871.681262] NVRM: GPU Board Serial Number: [ 871.681264] NVRM: Xid (PCI:0000:01:00): 16, Head 00000000 Count 00008a93 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1821194 Title: [nvidia] Screen frozen after switch to other tty and do login & logout To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821194/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
