[Bug 60408] New: [i915 N10 IGC] Huge slowness with version 2.20.18 solved by reverting to 2.20.16

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60408

          Priority: medium
            Bug ID: 60408
          Assignee: chris at chris-wilson.co.uk
           Summary: [i915 N10 IGC] Huge slowness with version 2.20.18
                    solved by reverting to 2.20.16
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lepennec at cmap.polytechnique.fr
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Dear all,

  I'm a Fedora 17 user using the testing repository. I've been hit by an issue
with the version 2.20.18. With this driver, the display becomes much slower and
the process Xorg uses up to 100 % of the CPU most of the time. Reverting to the
previous version 2.20.16 solves the issue.

To be more specific, my laptop is a Dell Latitude 2120 equipped with an 
Intel Corporation N10 Family Integrated Graphics Controller (rev 02). My xorg
server version is 1.12.4. The issue is present whether I'm using the latest
kernel 3.7.5 or an older version such as 3.6.11. At least another one suffers
from this issue as explained in
https://bugzilla.redhat.com/show_bug.cgi?id=903319 where you could find a much
more detailed report.

Feel free to ask me for more information if required.

   Yours,

       Erwan

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