That message means "invalid/unsupported buffer format" ( http://sources.debian.net/src/mesa/10.3.2-1/src/mesa/drivers/dri/nouveau/nv10_state_fb.c ), and as it appears to refer to an internal nouveau buffer rather than a passed-in texture, I suspect this is actually a mesa/nouveau bug.
As I do not have the hardware to test this myself, please do (in a terminal): $ sudo apt-get install libgl1-mesa-dri-dbg gdb $ gdb --args fgfs [or gdb --args stellarium, whichever is easier to reproduce the crash in] (gdb) set pagination 0 (gdb) run [wait for crash] (gdb) thread apply all bt full and post the ouput here. ** Changed in: mesa (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1079011 Title: stellarium assert failure: nv10_state_fb.c:50: get_rt_format: Assertion `0' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/flightgear/+bug/1079011/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs