[Bug 57958] New: [[GM45]] [Driver/Intel] X stuck in uninterruptible sleep

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57958

          Priority: medium
            Bug ID: 57958
          Assignee: chris at chris-wilson.co.uk
           Summary: [[GM45]] [Driver/Intel] X stuck in uninterruptible
                    sleep
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: main.haarp at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Bug description:
If I switch the screen off (e.g. xset dpms force off, entering standby,
xscreensaver, etc), the screen does switch off, but X becomes stuck in
uninterruptible sleep. This ONLY happens if I have been playing gzdoom (+brutal
doom mod) with hardware acceleration prior to that.
I have no choice but to forcibly reboot the machine when this happens, because
not even SIGKILL can kill it. ps reveals:

  PID COMMAND  STAT WCHAN
 2200 X        Ds+  intel_finish_fb

It is stuck in intel_finish_fb.

System environment:
-- chipset: Intel GM45
-- system architecture: 64-bit
-- xf86-video-intel: 2.20.13, 2.2.15 also tested
-- xserver: 1.13.0
-- mesa: 9.0
-- libdrm: 2.4.40
-- kernel: gentoo-sources-3.5.7
-- Linux distribution: Gentoo
-- Machine or mobo model: Lenovo Thinkpad SL510
-- Display connector: LVDS @ 1920x1080

Reproducing steps:
-Play gzdoom with BD mod for a few minutes
-Quit game
-xset dpms force off
-display switches off and X stuck

Additional info:
No suspicious kernel log or Xorg log.

xorg.conf:
Section "Monitor"
        Identifier      "<default monitor>"
        DisplaySize     344.16 193.59
EndSection


Further testing in progress.

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