Some OpenGL programs never repaint by themselves, just repaints once on window resize

English Hardware
1

These OpenGL programs never repaint by themselves (I have to keep resizing their window to make the picture update):

  • Celestia
  • Speed Dreams (windowed)

Am I the only person in the world seeing this? I would love to get some pointers (I have googled my ass off today…)

Strangely, other OpenGL programs work flawlessly:

  • 0ad
  • Speed Dreams (fullscreen)

I’m just guessing this is hardware & driver related (Celestia used to work on my now-dead Nvidia laptop, with every OpenSuse release the last couple of years). My current machine:
OpenSuse 12.2 x86_64
Radeon HD 6530D (AMD Llano)
fglrx64_xpic_SUSE122 version 8.982-1

Compiling Celestia from SVN made no difference (tried revision 5214 compiled with each one of --with-glut, --with-gtk, --with-gnome, --with-kde, --with-qt).

2

I don’t have a solution, but almost certainly related to the graphics driver at a guess…

Radeon HD 6530D (AMD Llano)
fglrx64_xpic_SUSE122 version 8.982-1

3

I found out about it.
KDE System Settings → Desktop effects → Advanced → Compositing type:
Change from XRender to OpenGL.