[Bug 73943] [snb i915] DP Flicker

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73943

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
The higher levels of flicker involve displaying the backbuffer instead of the
frontbuffer - so you either see stale rendering or partially re-rendered state.
Flickering due to underrun tends to be much more regular in its content, the
screen either wholly (or more usually partially) flickers to black (or another
colour), or sometimes part of the screen changes colour. Sometimes this is
associated with the position of the cursor (since that too is using
display/memory bandwidth concurrently with the primary display plane). Is there
any chance you can record the flicker using a phone? Also if the flicker shows
up in a screencast (i.e. when recording the frontbuffer of the display) that
implies that the error is at an even higher level of the stack.

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