Strange application lockups

[Don Levey]

On 7/20/2012 12:14, Emmett Culley wrote:
> Mine is a 64bit system and virtually all KDE packages are installed.
> It has been happening since soon after installing (fresh) Fedora 17.
> 
> Like Don noted, when this is happening I have no problem switching 
> between desktops, so plasma isn't the culprit, it seems.  Because I 
> always see abrt-applet using lots of CPU cycles upon switching
> desktops to a "locked" app, I have been assuming it was related to a
> null pointer error in the kernel that was supposed to be fixed in
> 3.4.5-2 (BZ 838730).  Installing the kernel last night did not fix
> it.
> 
We may be seeing different problems, then.  I *can't* switch between
desktops; at least, not using the mouse.  While I can see the cursor
move nothing is responsive to clicks.  I don't know the keyboard
shortcuts to switch between desktops, so I've not tried that.
 -Don