[Mageia-dev] Fwd: fallback mode

Tue Nov 6 01:53:57 CET 2012

Hi *,
+
+On Tue, Nov 6, 2012 at 1:33 AM, andre999 <andre999mga at laposte.net> wrote:
+> Olav Vitters a écrit :
+>> On Mon, Nov 05, 2012 at 06:56:55PM -0500, andre999 wrote:
+>>> Olav Vitters a écrit :
+>> [...]
+>
+> Nothing in the visual appearance of gnome3 could not be displayed
+> efficiently on gnome2 on machines without hardware acceleration of display,
+> so there is obviously a problem with the implementation in gnome3, at least
+> up to version 3.4
+
+Just FYI: It is not only display performance of gnome itself, but also
+driver bugs that only trigger in 3d-destkop environment.
+
+I for example have non-smooth video-playback ("stutter" when there are
+pans, as if it would not display frames like "*   *   *   *   *" but
+more like "*        ***  *     **". Playback is flawless in fallback
+mode. Unfortunately the problem is minor after reboot, and slowly gets
+worse with uptime (restarting gnome-shell using <alt>+<F2>,r,<enter>
+also helps somewhat, as does using
+CLUTTER_PAINT=disable-clipped-redraws:disable-culling and
+CLUTTER_VBLANK=True
+(black magic variables found via google that help to solve all sorts
+of problems (that don't occur here, like tearing), esp. don't see the
+relation between vblank and the other one, as they only have an impact
+when used in combination..
+
+
+Long story short: performance/rendering of gnome itself is not the
+actual problem, it is those little driver-bugs that can spoil the
+party... (I had created a separate account with gnome-fallback just
+for the usecase of watching videos - don't use that for regular
+watching anymore, but still when I need to check videos for
+encoding/playback errors)
+
+ciao
+Christian
+