Public bug reported: In trying to debug the Lucid xserver crash-on-first-session-start issues. I have installed "xserver-xorg-dbgsym" in the hope that the backtrace of "/usr/bin/X" would reveal more detail via a core dump instead of the "Xorg.0.log" report:
----- Backtrace: 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e880b] 1: /usr/bin/X (0x8048000+0x61aed) [0x80a9aed] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xc06410] 3: /usr/bin/X (0x8048000+0x2a190) [0x8072190] 4: /usr/bin/X (0x8048000+0x1ed3a) [0x8066d3a] 5: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x25fbd6] 6: /usr/bin/X (0x8048000+0x1e921) [0x8066921] Caught signal 3 (Quit). Server aborting ----- I added the NoTrapSignals option to xorg.conf as detailed at https://wiki.ubuntu.com/DebuggingProgramCrash#The%20Xorg%20server ----- /etc/X11/xorg.conf fragment ----- Section "ServerFlags" Option "NoTrapSignals" "true" EndSection ----- But on restarting the PC and encountering the bug the signal is still caught by the xserver. The xorg.0.log shows the option is recognised: ----- ... (==) Using config file: "/etc/X11/xorg.conf" (==) ServerLayout "Default Layout" (**) |-->Screen "Default Screen" (0) (**) | |-->Monitor "LCD Panel 1024x768" (**) | |-->Device "Intel Corporation 82815 CGC" (**) Option "NoTrapSignals" "true" ... Backtrace: 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e880b] 1: /usr/bin/X (0x8048000+0x61aed) [0x80a9aed] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xc06410] 3: /usr/bin/X (0x8048000+0x2a190) [0x8072190] 4: /usr/bin/X (0x8048000+0x1ed3a) [0x8066d3a] 5: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x25fbd6] 6: /usr/bin/X (0x8048000+0x1e921) [0x8066921] Caught signal 3 (Quit). Server aborting ----- The debug symbols are installed: ls -l /usr/lib/debug/usr/bin/ ls -l /usr/lib/debug/usr/bin/ total 6404 -rw-r--r-- 1 root root 17289 2010-03-02 17:00 cvt -rw-r--r-- 1 root root 11387 2010-03-02 17:00 gtf -rwxr-xr-x 1 root root 10911 2010-03-04 04:13 X -rw-r--r-- 1 root root 6510542 2010-03-02 17:00 Xorg ** Affects: xorg-server (Ubuntu) Importance: Undecided Status: New -- [Lucid] Option NoTrapSignals ignored when debugging xserver https://bugs.launchpad.net/bugs/532845 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
