Unable to kill runaway app. -

[Bob Goodwin]

I just had perhaps the third occurrence of this problem.

I tried to shut down gthumb which was displaying a a photo from the nfs 
server. It would not shut down, at least not in a reasonable amount if 
time. Gkrellm showed cup1 running at max. and top indicated the cup at 
99.5%. Something did eventually time out but that did not calm the cup 
activity.: .

    3487 bobg      20   0  2928 1068  932 R 99.5  0.0 445:55.55 gam_server

Kill 3487 does not stop it. In fact nothing seems to. I told it to 
poweroff and it got as far as "halting system" and stayed there until I 
pressed the power button for five seconds or so.

This happened once last night and it sat there saying it was busy, the 
power button was required to kill it then too.

I don't expect anyone to troubleshoot the problem but would like to know 
what other commands I might try to restore things without shutting down 
and rebooting.

This is an F-10 system pretty much up to date, certainly all security 
updates and perhaps all the rest, I've lost track at the moment. I 
suspect the problem is related to some horse photo files from my 
daughters Mac. But I need a way to stop things when this happens ...

Any help appreciated.

Bob