kde4 problem

[Don Levey]

subhodip biswas wrote:
> hi !
> 
> i just upgraded my F8 machine to F9 using an i386 DVD .Problem was
> after  Upgrade i was getting kde4 desktop and kde3 panel . So i
> removed whole kde using yum and reinstalled kde4 using yum . Now I am
> unable to login and stuck in a white screen .
> what I am missing out here .
> 
> GNOME is suucesfully update .
> 

This sounds very similar (in result, at least) to the problem I posted 
on the 19th.  I still haven't found a resolution:

"I've been using KDE - and I guess it was KDE that started up when I 
first logged in this morning.  It's tough to tell, of course, because 
the window manager option on the login screen is no longer there (can I 
get that back somehow?).  I tried a number of things within KDE to see 
if I could resize the display properly - Desktop Resize and Rotate 
looked like it might help, in that it actually *had* an option for the 
proper resolution (though it didn't do anything).  But then I selected 
something like "Compiz Manager".  I was told to restart the X server, 
which I did - and now after logging in all I get is a white screen..  I 
can get to a console session, but if I try to restart the X session I 
get the white screen again (or worse, a black screen, in which I can 
type but nothing happens).  There seems to be a compiz process still 
running, and hogging lots of CPU.

I can get to a gnome session only by restarting X to get to the login 
screen and selecting "other" for username - then I enter my 
username/password as usual.  From here, trying to change the default 
desktop (using switchdesk) doesn't help - I still get the white screen 
if I select my username at the login screen.

Clearly, there should be some basic switch I can flip in a config file 
somewhere, but I don't know what it is.  How can I get my KDE back?

  -Don