You're missing the error lines before the pipe state mismatch. Also
looks like a separate bug..
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https://bugs.launchpad.net/bugs/1523088
Title:
WARN_ON(!wm_changed) warning
had bigger problems today in the morning after turning computer freshly
on so filed a new bug already ( Bug 93393 ). when i freshly turned on
the computer and booted with kernel 4.4 the 2nd display did not get
initialized right, when booting with kernel 4.3 first and then rebooting
it seems to
the previous warnings are gone but now i had these 2 warnings when
coming back from lunch, so guess it happened during turning the displays
back on from sleep state.
Dec 15 12:38:18 linux-k058 kernel: [ cut here ]
Dec 15 12:38:18 linux-k058 kernel: WARNING: CPU: 5 PID:
** Changed in: xorg-server (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1523088
Title:
WARN_ON(!wm_changed) warning and stacktrace in kernel
** Bug watch added: freedesktop.org Bugzilla #89055
https://bugs.freedesktop.org/show_bug.cgi?id=89055
** Also affects: xorg-server via
https://bugs.freedesktop.org/show_bug.cgi?id=89055
Importance: Unknown
Status: Unknown
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg-server (Ubuntu)
Status: New => Confirmed
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Public bug reported:
I always get an warning and stacktrace (and it seems to hang a little
bit). This occurs after reboot as well as when I move with the cursor
between my hdmi monitor and my laptop. (This only occurs when HDMI is
connected)
Default Kubuntu install version 15.10 with kernel
Also with kernel 4.3 the problem persists.
[ cut here ]
[Sam Dez 5 23:23:25 2015] WARNING: CPU: 2 PID: 880 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_pm.c:3668
skl_update_other_pipe_wm+0x1de/0x1f0 [i915]()
[Sam Dez 5 23:23:25 2015] WARN_ON(!wm_changed)
[Sam
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