Comment 10 for bug 38692

I just started seeing a similar problem, but my output of "$ kcmshell displayconfig" is a bit different:

$ kcmshell displayconfig

Pythonize constructor -- pid = 11128
Python interpreter initialized!

Pythonize constructor -- pid = 11128
open /dev/mem: Permission denied
VESA BIOS Extensions not detected.
Xlib: extension "XFree86-VidModeExtension" missing on display ":1.0".
Traceback (most recent call last):
  File "<string>", line 8, in kcontrol_bridge_create_displayconfig
  File "/usr/lib/python2.4/site-packages/displayconfig.py", line 1677, in create_displayconfig
    return DisplayApp(parent, name)
  File "/usr/lib/python2.4/site-packages/displayconfig.py", line 443, in __init__
    self.xsetup = XSetup(self.xconfigpath)
  File "/usr/lib/python2.4/site-packages/displayconfigabstraction.py", line 368, in __init__
    self._finalizeInit()
  File "/usr/lib/python2.4/site-packages/displayconfigabstraction.py", line 373, in _finalizeInit
    gfxcard._finalizeInit()
  File "/usr/lib/python2.4/site-packages/displayconfigabstraction.py", line 1082, in _finalizeInit
    screen._finalizeInit()
  File "/usr/lib/python2.4/site-packages/displayconfigabstraction.py", line 1599, in _finalizeInit
    (self.redgamma, self.greengamma, self.bluegamma) = self.x_live_screen.getGamma()
  File "/usr/lib/python2.4/site-packages/xf86misc.py", line 50, in getGamma
    return ixf86misc.GetGamma(self.display,self.screenid)
SystemError: error return without exception set
error: *** runFunction failure
;

The problem is the same whether or not I run as root. The line about "VidModeExtension" may be important, although my Xorg.0.log file indicates that the extenstion _was_ loaded. Whetever the cause of the problem, the actual bug seems to be in DisplayApp(parent, name), which is probably just returning a null pointer when it's not supposed to..