[Bug 111701] PSR causes graphical glitches on Dell XPS 15 9570

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111701

--- Comment #8 from Jose Roberto de Souza <jose.souza at intel.com> ---
Created attachment 145437
  --> https://bugs.freedesktop.org/attachment.cgi?id=145437&action=edit
patch calculating IO buffer wake and fast wake lines

Thanks for the test, can you apply the patch attached and try again with PSR2?
If that do not work, please revert it and add this kernel parameter:
i915.enable_fbc=0 and try again with PSR2.

Please let me know the result

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