[Bug 85406] New: Black screen when visiting some website

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85406

            Bug ID: 85406
           Summary: Black screen when visiting some website
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: ou.ghorbel at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

I get black screen when visiting some website on Google Chrome or Firefox. As
example, the bug is reproduced when playing some video on youtube.
When playing a video on youtube the screen get black and the sound continue to
play back. On FireFox the screen get black when accessing the page:
http://www.google.com/chrome

Info about my graphic card

lspci | grep -i vga 00:02.0 VGA compatible controller: Intel Corporation Mobile
GM965/GL960 Integrated Graphics Controller (primary) (rev 0c)

I have tested a couple of ubuntu 14.04 based distribution (64 and 32 bit) and
they all have the issue. It's reproduced event with Fedora 20.

The bug can simply reproducing by booting the live CD of ubuntu 14.04, then
open FireFox and go to the page google.com/chrome

Loading the DDX fbdev instead of intel, seems to fix the issue. but this is not
efficient....

Is there a way to debug the issue?

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