[Bug 80629] New: i915 w/ 845GL: black screen with moveable mouse when X/kdm starts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80629

          Priority: medium
            Bug ID: 80629
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: i915 w/ 845GL: black screen with moveable mouse when
                    X/kdm starts
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: pdi at otenet.gr
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 101917
  --> https://bugs.freedesktop.org/attachment.cgi?id=101917&action=edit
runlevel 4 GPU crash dump

hw: Dell Inspiron 1100, graphics i845GL, BIOS A32 (latest), RAM allocated to
video in BIOS 8M (max)
os: slackware 14.1 w/ kernel 3.14.5, i915, kdm, lxde
    no kernel module options, and no xorg.conf editing
    (although various combinations have been tried)

symptoms:
- boot to runlevel 3
  login
  startx
  black screen & mooveable mouse [moment of logs, all seems normal]
  right click brings desktop menu w/ letters missing
  guess start menu/logout position and logout (stops x)
  startx
  everything works normally
- boot to runlevel 4 (equivalent to 5 of other distros)
  kdm login screen ok [moment of logs, gpu crash dump]
  login
  kdm login screen freezes
  wait for disk led to stop
  right click brings desktop menu w/ letters missing
  guess start menu/logout position and logout
  kdm login screen ok
  login
  everything works normally
- whatever it is, it happens the very first time X starts, directly or by kdm.
  Subsequent x restarts work ok.

secondary symptoms (perhaps unrelated):
- during boot, before drm kicks in, output only covers the central ~1/3 of
screen
- during boot, when drm kicks in, a black screen (random)

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