Public bug reported:
When I install ubuntu-desktop on servers with an AMI BMC, I find a
remote desktop running on the BMC's virtual KVM display hangs when I
transition to the lock screen. The screen either goes blank and fails to
wake up on keyboard/mouse input - or the lock screen appears but
freezes, leaving the clock display frozen in time.
Correlated with the issue are the following messages in /var/log/syslog,
which are emitted when I move the mouse cursor while the lock screen is
frozen:
Jan 19 20:34:53 starbuck gnome-shell[5002]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
Jan 19 20:34:53 starbuck gnome-shell[5002]: Page flip discarded:
drmModeAtomicCommit: Invalid argument
Jan 19 20:34:53 starbuck gnome-shell[5002]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
Jan 19 20:34:53 starbuck gnome-shell[5002]: Page flip discarded:
drmModeAtomicCommit: Invalid argument
Jan 19 20:34:53 starbuck gnome-shell[5002]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
Jan 19 20:34:53 starbuck gnome-shell[5002]: Page flip discarded:
drmModeAtomicCommit: Invalid argument
Jan 19 20:34:53 starbuck gnome-shell[5002]: Failed to post KMS update:
drmModeAtomicCommit: Invalid argument
A commonality of these systems is that they use the astfb driver.
I've found that this issue follows the kernel version. If I run a jammy
desktop with jammy's 5.15 kernel, this issue occurs. If I downgrade just
the kernel back to focal's 5.4, the issue vanishes.
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1958583
Title:
entering gnome lockscreen causes astfb displays to hang
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