[Bug 100617] [ILK][Regression bisected] Gnome Shell slow animations

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100617

groucho <grouchomarx.fr at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WORKSFORME                  |---
             Status|CLOSED                      |REOPENED

--- Comment #10 from groucho <grouchomarx.fr at gmail.com> ---
I have tested drm-tip from 2018-04-25.
The situation hasn't changed.


I guess I should have opened it as soon as the regression was introduced,
unfortunately I was using Debian at the time. The machine is old now, and I
imagine it is going to have less and less attention from the developers.


I still don't know why the frame rate is halved. Is it the drm or
gnome-shell/mutter/clutter? I wish I could help, but I am not sure how to debug
this.

I only know that my experience with Gnome was very good with Debian Jessie and
UXA (hence the bisection). So I assume the hardware is capable enough.
KDE Plasma doesn't have this issue at all, in any mode (modesetting, UXA,
SNA...).

I also don't have this issue on a Sandy Bridge. Only on my Ironlake.

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