Problem could be reproduced with following graphic adapters: 01:00.0 VGA compatible controller: NVIDIA Corporation NV40 [GeForce 6800] (rev a1) 01:00.0 VGA compatible controller: NVIDIA Corporation NV31 [GeForce FX 5600XT] (rev a1)
(Firefox probably blacklisted the second card for webgl, to be able to investigate on the issue I had to enable manually.) But the crash happens for the first card with default settings. As far as I could observe, Firefox creates 3 contexts, then destroys the last one but then still accesses the freed memory of the destroyed context. I believe this crash got fixed by this upstream commit: http://cgit.freedesktop.org/mesa/mesa/commit/src/gallium/drivers/nouveau/nv30/nv30_context.c?id=c092c46b27c6f6a6674e8d67fb3afdb684811819 Unfortunately this commit got only into 10.2.2. But as Trusty Tahr is a LTS release it probably will stay a long time with users using older graphics cards. Therefore I ask if this little patch could be added. ------ Building package libgl1-mesa-dri like this makes the crash for me go away: mkdir -p ~/ubuntu/mesa; cd ~/ubuntu/mesa apt-get source libgl1-mesa-dri cd mesa-10.1.3 wget wget http://cgit.freedesktop.org/mesa/mesa/patch/src/gallium/drivers/nouveau/nv30/nv30_context.c?id=c092c46b27c6f6a6674e8d67fb3afdb684811819 -O debian/patches/999-nv30_avoid_dangling_references_to_deleted_contexts.patch echo "999-nv30_avoid_dangling_references_to_deleted_contexts.patch" >> debian/patches/series patch -p1 < debian/patches/999-nv30_avoid_dangling_references_to_deleted_contexts.patch dpkg-buildpackage cd .. # sudo dpkg -i libgl1-mesa-dri_10.1.3-0ubuntu0.1_i386.deb ------ Other references where this bug seems to appear (just for reference): https://bugzilla.redhat.com/show_bug.cgi?id=1125339 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=661387 https://crash-stats.mozilla.com/report/list?signature=nouveau_dri.so%400x239b79 ** Bug watch added: Red Hat Bugzilla #1125339 https://bugzilla.redhat.com/show_bug.cgi?id=1125339 ** Bug watch added: Debian Bug tracker #661387 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=661387 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1364522 Title: Firefox crashes sometimes when using webgl with nouveau driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1364522/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
