Comment 2 for bug 1509326

Added Christopher M. Penalver (penalvch) as requested in #1313847.
Sorry for coming back to you so late, I've been trying to find out more but couldn't determine anything.

Note that ubuntu-bug reported this to me when I started it from the command line:

ubuntu-bug xorg
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
ERROR: hook /usr/share/apport/package-hooks/source_xorg.py crashed:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport/report.py", line 197, in _run_hook
    symb['add_info'](report, ui)
  File "/usr/share/apport/package-hooks/source_xorg.py", line 677, in add_info
    attach_nvidia_info(report, ui)
  File "/usr/share/apport/package-hooks/source_xorg.py", line 521, in attach_nvidia_info
    attach_file(report, logfile)
  File "/usr/lib/python3/dist-packages/apport/hookutils.py", line 115, in attach_file
    report[key] = read_file(path, force_unicode=force_unicode)
  File "/usr/lib/python3/dist-packages/problem_report.py", line 627, in __setitem__
    assert k.replace('.', '').replace('-', '').replace('_', '').isalnum()
AssertionError

(process:7289): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed