I opened a bug report her:
https://bugs.freedesktop.org/show_bug.cgi?id=89291
-The problem affects only ivybridge.
-The problem is gone after activating sna acceleration. With
-intel-2.21.15 from testing I recognized other bugs (e.g. big shadows
under the nautilus window).
-With -intel-2.99.917
Okay, after generating /usr/share/X11/xorg.conf.d/20-intel.conf with the
following content...
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
EndSection
...the problem is solved. This workaround results in little tearing.
Adding the tear
Thanks, I can try it. But: The animations in Gnome shell in Debian are
smoother than in other distributions like Fedora or Archlinux, which are
using a recent driver – I tested a lot configuration like tearfree or
sna.
It sounds crazy but the "old" Debian driver in combination with UXA
seems to in
This happens not every time but always after reboot und often after
suspend.
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