[Bug 91393] [bdw edp] Screen Flickering

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91393

--- Comment #132 from Lorenzo Bettini <lorebett at libero.it> ---
(In reply to Jani Nikula from comment #129)
> (In reply to Lorenzo Bettini from comment #128)
> > (In reply to Jani Nikula from comment #127)
> > > commit 91df09d92ad82c8778ca218097bf827f154292ca
> > > Author: Mika Kahola <mika.kahola at intel.com>
> > > Date:   Mon Jun 20 11:10:26 2016 +0300
> > > 
> > >     drm/i915: Revert DisplayPort fast link training feature
> > 
> > where do we find this fixed kernel in binary form?
> 
> Wait for that to find its way in Linus' upstream, then get backported to
> stable kernels, then to be picked up by distros, then be rolled out to
> users...

I've tried the ubuntu kernel ppa mainline, and by using this one

http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2016-06-21-yakkety/

which I guess it's based on the commit you were mentioning, flickering is gone:
I can change the screen resolution and even after screensaver resume there's no
flickering.

However, when using desktop effects like "show all windows/expose" (both in
unity with compiz and with KDE) there's some flickering...

By the way, while using kernel 4.2 I used to fix the flickering by reverting
the commits mentioned in https://bugs.freedesktop.org/show_bug.cgi?id=91393#c25
and recompiling the kernel.

This reverting cannot be done on kernel 4.4 though.  Thus, the reverted commits
you're mentioning are not the ones mentioned in
https://bugs.freedesktop.org/show_bug.cgi?id=91393#c25 ?

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