Hi All,
New to these forums as I've not long installed FC10 on a G5 PowerMac. The machine is used as a file/web/database server and sits there happily doing it's thing. However as soon as it's put under heavy load it'll overheat and shutdown. When I say heavy load I use it to encode video with ffmpeg and do a bit of compilation now and then.
Here's the output from 'tail -f /var/log/messages'...
Code:
Jun 16 16:31:50 g5 kernel: Warning ! Temperature way above maximum (96) !
Jun 16 16:31:51 g5 kernel: Temperature 88 above max 88. overtemp 72
Jun 16 16:31:52 g5 kernel: Temperature back down to 85
Jun 16 16:34:41 g5 kernel: Temperature 88 above max 88. overtemp 1
Jun 16 16:34:42 g5 kernel: Temperature 88 above max 88. overtemp 2
Jun 16 16:34:43 g5 kernel: Temperature back down to 86
Jun 16 16:38:02 g5 kernel: Temperature 88 above max 88. overtemp 1
Jun 16 16:38:03 g5 kernel: Temperature back down to 86
Jun 16 16:41:35 g5 kernel: Temperature 88 above max 88. overtemp 1
Jun 16 16:41:36 g5 kernel: Temperature back down to 87
Jun 16 16:44:05 g5 kernel: Temperature 94 above max 88. overtemp 1
Jun 16 16:44:06 g5 kernel: Temperature back down to 87
Jun 16 16:44:17 g5 kernel: Temperature 88 above max 88. overtemp 1
Jun 16 16:44:18 g5 kernel: Temperature 94 above max 88. overtemp 2
Jun 16 16:44:19 g5 kernel: Temperature 95 above max 88. overtemp 3
Jun 16 16:44:20 g5 kernel: Warning ! Temperature way above maximum (96) !
Jun 16 16:44:21 g5 kernel: Warning ! Temperature way above maximum (97) !
Jun 16 16:44:22 g5 kernel: Warning ! Temperature way above maximum (97) !
Jun 16 16:44:23 g5 kernel: Warning ! Temperature way above maximum (97) !
Jun 16 16:44:23 g5 kernel: Temperature control detected a critical condition
Jun 16 16:44:23 g5 kernel: Attempting to shut down...
Jun 16 16:44:23 g5 kernel: Can't call /sbin/critical_overtemp, power off now!
...and the output of 'uname -a'...
Code:
2.6.27.24-170.2.68.fc10.ppc64 #1 SMP
You can see what's happening, basically as far as I can tell the fans aren't spinning up to their maximum speed to reduce the heat. When running Mac OS X (it's dual boot) the system stays up and keeps itself cool. The fans do spin up and down when required, but under heavy load they don't seem to get to their top speed.
I've read about this problem all over the place so I know it's not specific to Fedora, however as far as I could find out the problem was fixed in the 2.6.17 kernel, I'm running 2.6.27 at the moment.
Does anybody know how I can adjust the system to get the fans spinning up sooner? I did have a look at 'sysctl -a' output to see if there was something I could alter there (perhaps adjust the spin-up temps down) but didn't see anything.
Any suggestions would be most appreciated.
Linear Mode
