Same problem here, with open source RADEON driver (r300) and AIGLX. I may have found an explanation on the OpenSuse XGL Troubleshooting page (http://en.opensuse.org/Xgl_Troubleshooting). Here is the interesting quote: --- General hardware dependent issues * XVideo will be very slow if hardware acceleration (pixel shaders) is not available. If using a composite manager, it will only be fast if FBOs or pBuffers are available and activated, or for fully opaque fullscreen windows (turn on option apps/compiz/general/screen0/options/unredirect_fullscreen_windows).
ATI / open source driver "radeon" * Driver has neither pBuffer nor FBO support. When using a composite manager all windows are rendered in software and only compositing is hardware accelerated. Astonishingly, this works well enough for most use cases. --- Regarding lauching two instances of VLC and getting video output on the second one: > Mike I can confirm that it behaves exactly the same. The first video opened > works 'some times' but not very often. The second video opened works no > matter what you do with it. I guess the second instance just fails over to x11 (poor video quality) with no hardware acceleration, and no antialiasing... -- Video does not work with Desktop Effects enabled https://bugs.launchpad.net/bugs/102290 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
