[Bug 96916] Regression: screen flashes with PSR enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96916

--- Comment #5 from David Weinehall <david.weinehall at intel.com> ---
I've now tested this on a ThinkPad Yoga (I don't have access to any ThinkPad
T440p) with a Core i5-4200U (HD Graphics 4400), and a HP ZR24w display
connected via the mini-HDMI connector on that laptop.

With PSR enabled (/sys/module/i915/parameters/enable_psr == 1) and
drm-intel-nightly from 28th of September I cannot reproduce this. I am *not*
using the xserver-xorg-video-intel driver, my setup is using the xorg
modesetting driver.

That's the only difference I can think of (except that I'm not using the except
same laptop model, obviously).

I've tested setting the external display as a secondary display, and as a
mirror, both worked as they should.

Before testing I ran powertop --auto-tune (to ensure that nothing blocks power
management).

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