X.Org X server

  1. Bug #738526
  2. Comment #15

Comment 15 for bug 738526

Revision history for this message
Bryce Harrington (bryce) wrote : Re: Launching a Qt app crashes X with NVIDIA card even after fix for 650539

Ashely, if you're interested in debugging this particular issue further, here are some actions that could be taken:

1. Reproduce the issue and using gdb with a break set on doListFontsWithInfo and 'print c ' after the segfault to see what the contents of that structure is. This is to see if like in bug #683016 the c->num_fpes value is undefined.

2. Add a check in doListFontsWithInfo() to bail out early if c->fpe_list is NULL. I don't think that would be a proper fix, just paper over the issue, but it might be a good workaround for natty if it works. However if it does work it may simply move the bad behavior to somewhere else...

3. Test the current git version of xfs. There's been a couple changes to how font paths are done in xfs to match what xserver expects; perhaps that better avoids this situation. If you can't reproduce the crash when using this newer xfs, perhaps we simply need to update to newer xfs (or at least backport the font path patches).