On Wed, 11 Sep 2002, Norbert Koksch wrote:
> (Corrected message after hint of Angus Leeming)
>
> I have the following problem:
>
> Sometimes LyX (cvs, xforms 1.0RC4) chrashes with collapsing X-Window after
> generating of the ppm files for the preview.
[...]
> Angus Leeming asked me for a backtrace. The question is, how to make it:
>
> If I run
> gdb lyx-cvs1.3.0
> then I cannot enter bt, because X-Window is collapsing.
You'll need a virtual console for this so that you _might_ still be
able to get something useful. No guarantee though:
Start LyX in X from a command line (ie. from an xterm)
lyx &
Take note of process ID that was echoed to the console.
Switch to a virtual console and run:
gdb lyx ###
where ### is the process ID.
You just connected to an already running process and you'll still have
a gdb when X gets wiped. With luck gdb will catch the segfault and
allow you get a backtrace even if X is no longer up and running.
when the crash happens you can switch to the virtual console and so a:
bt
to get the backtrace. BTW, the simplest way to capture your gdb
session is :
gdb lyx ### | tee gdb_dump.txt
which lets you work on screen and get a copy dumped to a file.
Allan. (ARRae)
