Now I discovered (I haven't noticed it earlier since I rebooted the system more times per day) that it seems after a system boot, X seems to be unstable, however after an X crash (when gdm screen is redisplayed and I must relogin then) it seems to be stable then. I've tried to do the backtrace (with using NoTrapSignals in config file as it was suggested). The interesting thing that one time I got SIGINT and after I got the backtrace and I quited with gdb (it was attached to already running process with ssh'ing from another machine) X continued to work without any crash ... I re-attach gdb to X process and after some minutes I noticed the "true" problem (SIGQUIT) however the backtrace itself seems to be very similar only the signals are different.
Anyway the result is attached (the other backtrace I was talking about is almost the same just it is SIGINT instead of SIGQUIT, I have checked it out with making diff between the traces). ** Attachment added: "gdb-Xorg-2.txt" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/765136/+attachment/2071826/+files/gdb-Xorg-2.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/765136 Title: [natty] X often crashes since upgrade to natty -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs