Public bug reported: libsdl1.2 always enables backingstore when it is present in the X server. For modern X servers, backingstore is implemented by redirecting through the composite extension. This causes tearing on SDL applications such as xbmc because the redirected rendering is not guaranteed to be synchronized.
A discussion of the problem by Nvidia is here: https://devtalk.nvidia.com/default/topic/679688/linux/tearing-in-sdl-1-2 -apps-unless-composite-extension-is-completely- disabled-/post/4111287/#4111287 The upstream bug is here: https://bugs.freedesktop.org/show_bug.cgi?id=74158 I have a patch that restores a check for the SDL_VIDEO_X11_BACKINGSTORE environment variable before trying to enable backingstore. ** Affects: libsdl1.2 (Ubuntu) Importance: Undecided Status: New ** Attachment added: "sdl-check-for-SDL_VIDEO_X11_BACKINGSTORE.patch" https://bugs.launchpad.net/bugs/1280665/+attachment/3982053/+files/sdl-check-for-SDL_VIDEO_X11_BACKINGSTORE.patch -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libsdl1.2 in Ubuntu. https://bugs.launchpad.net/bugs/1280665 Title: libsdl1.2 always uses backingstore which causes tearing in modern X servers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libsdl1.2/+bug/1280665/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
