[Bug 109541] New: WARNING: CPU: 2 PID: 4801 at drivers/gpu/drm/i915/intel_display.c:9151 hsw_enable_pc8+0x5e3/0x730 [i915]()

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=109541

            Bug ID: 109541
           Summary: WARNING: CPU: 2 PID: 4801 at
                    drivers/gpu/drm/i915/intel_display.c:9151
                    hsw_enable_pc8+0x5e3/0x730 [i915]()
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.2.7-300.fc23.x86_64
          Hardware: IA-64
                OS: Linux
              Tree: Fedora
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: marcel at ziswiler.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 197681
  --> https://bugzilla.kernel.org/attachment.cgi?id=197681&action=edit
full journal of gnome session crash

I resumed from suspend in UltraDock with DisplayPort screen connected.

Dec 17 10:08:19 localhost.localdomain kernel: WARNING: CPU: 2 PID: 4801 at
drivers/gpu/drm/i915/intel_display.c:9151 hsw_enable_pc8+0x5e3/0x730 [i915]()

It resumend fine but 10 minutes later when attempting to click something on the
application panel on the left the gnome session just crashed.

Dec 17 10:19:47 localhost.localdomain gnome-session-binary[2716]: WARNING: Lost
name on bus: org.gnome.SessionManager
...
Dec 17 10:19:47 localhost.localdomain gnome-session-binary[2716]: WARNING: App
'gnome-shell.desktop' exited with code 1
...
Dec 17 10:19:48 localhost.localdomain kernel: WARNING: CPU: 0 PID: 2662 at
drivers/gpu/drm/i915/intel_display.c:1362 assert_plane.constprop.99+0x6f/0x90
[i915]()
Dec 17 10:19:48 localhost.localdomain kernel: plane A assertion failure
(expected on, current off)

Full logs attached.

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