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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [xf86-video-intel] poor performance and stuttering"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=91108#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [xf86-video-intel] poor performance and stuttering"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=91108">bug 91108</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>To start with:

[     9.086] Kernel command line: BOOT_IMAGE=/vmlinuz-linux
root=UUID=49a81897-cb3e-471e-9bd8-47caa6367437 rw quiet splash
i915.enable_rc6=7 i915.enable_fbc=1 i915.lvds_downclock=1 drm.vblankoffdelay=1
i915.semaphores=1 acpi_osi=Linux acpi_backlight=vendor

is dangerous.

Do not set:
   i915.enable_rc6
   i915.enable_fbc
   i915.lvds_downclock
   i915.semaphores</pre>
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