*** This bug is a duplicate of bug 1968040 ***
https://bugs.launchpad.net/bugs/1968040
Number of monitors is not really relevant. What is relevant is that you
have a GPU (Intel) using atomic KMS and reporting:
[67521.542529] zb gnome-shell[2826]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
[67521.542585] zb gnome-shell[2826]: Page flip discarded: drmModeAtomicCommit:
Invalid argument
[67521.543357] zb gnome-shell[2826]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
[67521.551378] zb gnome-shell[2826]: Page flip discarded: drmModeAtomicCommit:
Invalid argument
[67521.560697] zb gnome-shell[2826]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
[67521.560825] zb gnome-shell[2826]: Page flip discarded: drmModeAtomicCommit:
Invalid argument
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https://bugs.launchpad.net/bugs/1978268
Title:
Internal monitor doesn't wake up if there is external monitor
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