Thanks. Unfortunately MUTTER_DEBUG=kms can't tell us which is the
invalid argument and I can't see a consistent pattern in the log.
Please try these in /etc/environment in separate sessions:
MUTTER_DEBUG_DISABLE_TRIPLE_BUFFERING=1
MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1968040
Title:
Blanked screen doesn't wake up after locking
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