From Bugzilla Helper:
User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.2-2 i686)

Description of problem:
GUI login fails. Under gnome it just returns to login screen after entering
correct username and password.  If incorrect data entered, login screen
returns that login is not authorized (as it should). Under kde, the
following error is returned after attempting to login: :startup program
/etc/X11/xdm/GiveConsole exited with non-zero status. I am able to login
from the console and then run X (as root) by startx. If I login as another
user from the console and use startx it is erratic whether or not I can get
to a graphics screen. Sometimes yes and at other times get it fails with "
kdeinit: Fatal IO error". 
I am running RedHat 7.1 with 2.4.2-2 kernel and XFree 4.0.3-5. I have a
Matrox Millenium G-400 AGP with 32MB memory and XFree is using the
XFree86-SVGA and mga driver. 

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.boot an init level 5	
2.GUI login presents itself
3.login fails as noted above
	

Actual Results:  See above, depends on whether I boot to Gnome default or
KDE.

Expected Results:  Should have been able to login and go to appropriate
desktop

Additional info:

I had trouble initially installing because the mouse was not recognized due
to IRQ conflict with sound card, so that X would not run adn continually
failed. Reported to support, but they were not helpful. Finally found cause
for X failure and corrected IRQ issue, but then had login problem. Reported
login problem and they said I should come to bugzilla.