[Bug 77768] New: resume from S3 slightly broken since kernel 3.10

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77768

          Priority: medium
            Bug ID: 77768
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: resume from S3 slightly broken since kernel 3.10
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: Knut_Petersen at t-online.de
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 97753
  --> https://bugs.freedesktop.org/attachment.cgi?id=97753&action=edit
Patch against kernel 3.14.1 that fixes the problem

Prior to commit 24576d2 (linux stable tree), everything worked fine. With the
commit, the xserver starts much slower after a prior resume from S3, the
monitor is switched off and on again, the kde splash screen is displayed in the
upper left corner (1024x768) on my 1280x1024 monitor. mplayer -fs plays a video
correctly, but the (normally) black bars above and below the video contain
garbage for x > ~1024 / y > ~768

Steps to reproduce the problem:

boot linux,
startx,
suspend (s3),
resume,
terminate xserver,
startx,
mplayer -fs foo.video

Reproducibility: 100% on my system (AOpen i915GMm-hfs mobo with Pentium-M
Dothan cpu, Eizo Flexscan L557 monitor)


Attached is a patch against 3.14.1. Directly reverting 24576d2 is impossible as
a helper function was eliminated, a file was renamed, and other patches touched
the code, but more or less my patch is simply a functional revert of 24576d2.


cu,
 Knut

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