The ctrl-alt-F2 + ctrl-alt-F1 trick mentioned above is sometimes, but
not always, necessary to get the display back after a suspend-resume
cycle.
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I tested some more. After logging out and receiving the broken video mode, I
can press ctrl+alt+F2 and get a textmode login screen. If I then immediately
press ctrl+alt+F1 I get to the graphic login screen, and can login again.
Pressing ctrl+alt+F1 directly at the broken video mode does nothing,
Logout worked fine when I used Ubuntu 20.4 / nvidia driver 450.102.04 on
the same machine.
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https://bugs.launchpad.net/bugs/1926023
Title:
display broken on logout
Status
Public bug reported:
I can login and use the system, but when I logout, the monitor complains
that it can't display the video mode. Pressing various keys and
clicking randomly doesn't help, I have to press the hard reset button to
login again.
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package
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