Quoting John5342 <john5342@gmail.com>:

> On Tue, Jun 22, 2010 at 08:54, Eli Wapniarski
> <eli@orbsky.homelinux.org> wrote:
>> Hi All
>>
>> I was wondering if anyone else has any experience with this.
>>
>> A colleague at work recently upgraded from F12 to 13 on his Dell
>> Inspirion 1545 with an ATI Mobility Radeon HD 4330. Everything seems
>> to be working just fine, except, when he initiates a shutdown it hangs
>> at the end.
>>
>> I think it might have something to do with the opensource driver,
>> because when he had the proprietary driver installed from rpmfusion
>> for F12 there was no such issue. When he had the opensource driver
>> installed in F12 before the proprietary driver became available, his
>> computer experienced the same issue. Now that there is no proprietary
>> driver available for F13 again he is forced to use the opensource
>> driver. Mind you, the performance has improved immensely, but he still
>> can't shutdown the computer correctly.
>
> I have experienced this too on occasion (fresh install of f13 +
> kde-redhat-unstable both with and without proprietary nvidia drivers).
> Not managed to narrow it down far enough to get around to a bug
> report. I think it's Plasma Workspace seems to crash with a
> segmentation fault during exit but by that point of the shutdown it
> seems to be unable to display the drkonqi dialog box reliably.
> Sometimes it is shown but is unresponsive. Most times the screen just
> goes blank and then hangs. Switching to another terminal (Alt+F2) and
> killing drkonqi allows shutdown to continue. After that it seems to
> shut down fine a few times before starting to hang again. that's as
> far as i have got in the investigation.
>

That's not my problem, I actually get out and the computer gets to the point where it says shutting down  / restarting, but then it hangs.

I found a bug at which seems relevant:

https://bugzilla.redhat.com/show_bug.cgi?id=529167

Eli