[Bug 94580] New: i915 Display manager screen frozen with cursor moving, remote ssh possible.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94580

            Bug ID: 94580
           Summary: i915 Display manager screen frozen with cursor moving,
                    remote ssh possible.
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: freedesktop at nusch.pl
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 122360
  --> https://bugs.freedesktop.org/attachment.cgi?id=122360&action=edit
Intelreg dump

It happens mostly while tampering with window - to reproduce I open
chromium-browser with ~30 tabs, then enter/exit full screen few times on
YouTube(HTML5) wideo. On drm-intel-nightly it happens even faster - often while
starting the browser or opening any window.
Started debugging with Ubuntu 4.2 kernel, then Ubuntu mainline 4.5 kernel, then
drm-intel-nightly. 

Issuing:
echo 1 > /sys/devices/pci0000:00/0000:00:02.0/rom
cat /sys/devices/pci0000:00/0000:00:02.0/rom > vbios.dump

gives input/output error at second step

cat /sys/class/drm/card0/error
no error state collected

Intel reg dump attached.

Above are relevant to drm-intel-nightly as requested , but stacktrace present
in launchpadbug from ubuntu 4.2 kernel may also be relevant:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1545320

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