4.1. | I have X.org 6.8.x, but kompmgr fails to start |
| You need to explicitly enable the Composite extension, add a new Section to /etc/X11/XorgConfig: Section "Extensions"
Option "Composite" "Enable"
EndSection |
4.2. | Ok, kompmgr works, but it's horribly slow |
| If supported by your GPU (mainly
NVIDIA™, and somewhat by ATI cards), first make sure
you activated the Render acceleration
Section "Device"
....
....
Option "RenderAccel" "true"
....
....
EndSection
If it's still slow, you can try to adjust your memory usage. Either
decrease you screen depth (for example, from 24 to 16) or lower your resolution
(for example, from 1280x1024 to 1024x768). Please notice that the currently limiting factor for the Composite
extension seems to be the CPU cache size. |
4.3. | After enabling the Composite extension, I cannot run any
GLX applications anymore. I've got an
NVIDIA™ card. |
| To prevent some problems, NVIDIA™ deactivated the
GLX support when Coposite is active. Reactivating is possible, but may cause
problems on some kernel/driver/GPU combinations.
Section "Device"
....
....
Option "AllowGLXWithComposite" "true"
....
....
EndSection
|
4.4. | I wanted to play a game using SDL (but not
GL), say scummvm, but when the
compmgr is active, all I can see is a shadow! |
| This is a problem with the PictType reported by SDL. Workaround:
Instead of calling scummvm directly, call
SDL_VIDEO_X11_VISUALID=0x24 scummvm This will tell SDL to
use a supported format and you can play as ever. |
4.5. | Application XXX refuses to start after enabling the Composite
extension. Application YYY breaks X after enabling the Composite
extension. Application ZZZ looks weird after activating the composite
manager. |
| The Composite extension is still experimental. Workaround: Instead of calling appName directly, call XLIB_SKIP_ARGB_VISUALS=1 appName Applications that are known to cause problems: All gtk1 applications (for example, gmplayer,
xmms, gaim) - failing
startup or look unusable weird or crash X KuickShow - displays only a black frame Qt™ Designer - crashes
X Kopete - crashes X Kolf - crashes X
|
4.6. | I try to watch a video, but only see artefacts in the Video
Window. |
| You're using “xv” as video backend. This is the overlay
mode, where the video content is written directly into the video card
memory, bypassing X. Therefore the window seems to be static (colored
background) and is not updated by the damage extension. There will hopefully be a fix for this in the future. Currently I had
the best results using Xine but displaying
translucent videos isn't fast anyway. |
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