Sebastien: I don't use nvidia at all; my hardware is a new gigabyte motherboard with integrated Intel 965g graphics. The dri driver is "i965_dri.so".
The history is that I downloaded Herd 3 in early february (12th?) and I have been updating several times a week since then. Initially the opengl stuff did not work at all so I downloaded the mesa source code in mid february to recompile with the "-fno-strict-aliasising" switch, and that fixed my initial problem. But then all gl apps broke after an update about ten days ago with the assertion error as described. Having already built mesa for the "-fno-strict-aliasing" problem it was trivial for me to apply the patch that I linked to in my bug report, and now all my gl apps are working fine (although they break again after almost every update). The mesa source code that I downloaded in mid february was a feisty source package and it clearly did _not_ have that patch applied. Jarek: The problem seems to be in the libGL library, not the hardware driver. After building mesa from source I just have to install libGL.so.1.2 into /usr/lib to fix it. YMMV. -- feisty: Assertion `c->xlib.lock' failed for all gl apps https://launchpad.net/bugs/88708 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs