Allright. I could not get it to produce a core file I could find (even when setting core_pattern to /tmp/core).
However I inserted some raise(SIGSTOP) at strategic points in the file, and then attached gdb to the process before it crashed. This is the output from gdb (running in the daemon directory of the gdm source): Program received signal SIGSEGV, Segmentation fault. 0x0806b1e1 in gdm_slave_run (display=0x80a8fc0) at slave.c:1050 1050 display->screenx = xscreens[xineramascreen].x_org; ---> I run the command: bt #0 0x0806b1e1 in gdm_slave_run (display=0x80a8fc0) at slave.c:1050 #1 0x0806b84d in gdm_slave_start (display=0x80a8fc0) at slave.c:934 #2 0x0805ccd0 in gdm_display_manage (d=0x80a8fc0) at display.c:414 #3 0x08051f1e in gdm_start_first_unborn_local (delay=0) at gdm.c:266 #4 0x08052a1f in main (argc=Cannot access memory at address 0x0 ) at gdm.c:1828 ---> I run the command: list 1045 if (screen_num <= gdm_daemon_config_get_value_int (GDM_KEY_XINERAMA_SCREEN)) 1046 gdm_daemon_config_set_value_int (GDM_KEY_XINERAMA_SCREEN, 0); 1047 1048 xineramascreen = gdm_daemon_config_get_value_int (GDM_KEY_XINERAMA_SCREEN); 1049 1050 display->screenx = xscreens[xineramascreen].x_org; 1051 display->screeny = xscreens[xineramascreen].y_org; 1052 display->screenwidth = xscreens[xineramascreen].width; 1053 display->screenheight = xscreens[xineramascreen].height; 1054 Also xscreens, seems to point to NULL. I can't see why I thought that this was a crash in gdmgreeter, as the greeter haven't even been started at this point. However it seems to be related to xinerama, as xscreens is the result of calling XineramaQueryScreens. However I'm quite unschooled in the workings of X, so I'll leave guessing why it returns NULL to you :-) -- gdm greeter crashes when X is using vesa driver https://bugs.launchpad.net/bugs/138718 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
