(CC'ing Helge Lenz the original reporter) I have been able to create a core file with the debugging version of the X server by using kill -SEGV, as Branden Robinson described. Then I tried to reproduce the problem with gnat-gps, and no core file is created. The X server exits as though gnat-gps were sending a Ctrl+Alt+Backspace to it. This then sends a SIGPIPE to gnat-gps, which crashes. Is it possible for a client program to cause the X server to shut down? If so, what kind of X request should I look for in gnat-gps?
Here is additional information on how to debug gnat-gps. Switch to a text console (e.g. VT1), login as yourself, and do: $ apt-get install gnat-gdb $ apt-get source gnat-gps $ cd gnat-gps-2.1.0 $ dpkg-buildpackage -rfakeroot (takes ~1h on my Pentium III 900 MHz) $ cd glide/obj $ gnatgdb gnat-gps (gdb) set env DISPLAY=:0 (gdb) break commands-builder.adb:207 (gdb) run Swith to the X console (VT7 by default). After loading sdc.gpr, press F4. Switch back to VT1 where GDB is running, and take it from there. At one point, the X server exits but gnat-gps keeps on running in GDB. In my previous experience, this happens while gnat-gps is in one of the GNAT.Expect.Expect procedures. Later on, gnat-gps receives SIGPIPE because the X server is down. Also, it is possible to attach GDB to the X server itself. In a text console, login as root and: # ps -u root | grep XFree86-debug (look at the PID of the X server) # gdb /usr/bin/XFree86-debug (gdb) attach <pid-of-X-server> I have not yet had time to go further than this. I would need to install the sources to the X server, possibly rebuild it, and try to find the exit point, i.e. what was XFree86 thinking when it shut down? -- Ludovic Brenta. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
