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therm_pm72 on G5 a little overly sensitive?
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2fj02jf2
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Joined: 09 Aug 2003
Posts: 17

PostPosted: Tue Apr 27, 2004 7:24 pm    Post subject: therm_pm72 on G5 a little overly sensitive? Reply with quote

I am trying to install gentoo on a dual 2GHz G5. I am currently running ppc-development-sources-2.6.5_rc2. With therm_pm72 loaded, I can get the machine to shut itself down by simply getting its load up to about 2 or so. What I did is to start 2 or 3 cpu intense jobs simultaneously and after about a minute the system shuts itself off. In the logs I find this:

Quote:

Apr 26 18:12:17 kernel: Temperature control detected a critical condition
Apr 26 18:12:17 kernel: Attempting to shut down...
Apr 26 18:12:17 kernel: Can't call /sbin/critical_overtemp, power off now!


This doesn't happen when I am booted in OS X, I therefore assume that the therm_pm72 modules is a bit too sensitive as to the temperature on the chip. Can I change the settings of the modules somehow? Is that a konw problem? And where would I get /sbin/critical_overtemp from?

Thanks
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genfoo
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Joined: 17 Apr 2003
Posts: 192

PostPosted: Wed Apr 28, 2004 2:47 pm    Post subject: Reply with quote

Hmm maybe it's the opposite problem .. maybe the chips did get too hot and module didn't kick on the fans soon enough? If I had a G5 I would gladly help test, but alas it's not in my budget in the near future!
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SeJo
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Joined: 08 Oct 2002
Posts: 298
Location: Belgium

PostPosted: Wed Apr 28, 2004 2:58 pm    Post subject: Reply with quote

dear,


I have seen the bugger work perfectly @ pvdabeels place (he has a G5)...
so it must be something else, might i suggest getting on irc (#gentoo-ppc)
and type "pvdabeel: ping".
when he pongs, ask the Q :p


greets
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"I am not bound to please thee with my answers."
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jaspal kallar
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Joined: 25 Feb 2004
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Location: Sweden

PostPosted: Wed Apr 28, 2004 9:31 pm    Post subject: Reply with quote

I have a dual 1.8 G5 and uname -r gives
Quote:
2.6.5_rc2-benh1


I have the therm_pm72 module built into my kernel. Before I also had it as a separate module. I have had no problems so far but there again I have not stressed the machine too much. I wonder therefore what kind intentive cpu things are you doing at the same time. Maybe I can try them out too and see if I get the same problem. Also must add that I am using
Quote:
ppc-development-sources-2.6.5_rc2-r1


PS. I _personally_ think that the fans a little quiter ( about 25%) in OS X but I hardly use it.
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2fj02jf2
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PostPosted: Thu Apr 29, 2004 2:30 am    Post subject: Reply with quote

Thanks for all your replies. I will try to get on IRC. To answer the last poster's question: I will be running calculations on the machine, with little I/O. To simulate this I simply ran something along those lines:

Code:

int
main ()
{
  double test;

  while (1) {

    test = atan (0.2);
  }
}


Once I start 2-3 concurrent instances of this program, the machine decides to shut itself off.
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korg
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Joined: 27 Jan 2004
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PostPosted: Thu Apr 29, 2004 4:54 am    Post subject: Reply with quote

Id suggest running your hardware test (on the install cd).

I had a similar problem (but mine was under macosx as this was before I had gentoo installed).

Your problem could be related (or maybe not given you dont get it under macosx).

How loud are your fans when the system is idle? (Try both macosx and linux). (They should be pretty quiet)

Note that you might need to run "2-3" of them because maybe its only one CPU that is questionable, not both.

Anyway... my problem was my G5 arrived and sounded like a jet engine. A little testing and a python loop of:

a=1
while a:
a=a+1

(under macosx) would cause the machine to shut down and sleep in about 5 seconds after pressing enter on the command. Pressing a key would wake it up for 5 seconds before it slept again. (Had to be quick with that control c).

Some checking showed that it was just 1 cpu fan that was running full tilt. So, I ran the hardware test and it said 'logic board error'. I assume one of the temp sensors was reporting that it was way overheating or something and it sleeped to protect itself.

(If I was lucky and the busy loop started on the ok processor the machine would run fine until I loaded the dud processor, then the same thing happened).

I sent my toy back and they fixed it. My machine is now just peachy quiet and can busy loop without sleeping ;) (under gentoo or macosx! :)

Have you tested much under macosx?
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jaspal kallar
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PostPosted: Thu Apr 29, 2004 1:25 pm    Post subject: Reply with quote

I ran 3 instances of
Code:
int
main ()
{
  double test;

  while (1) {

    test = atan (0.2);
  }
}


for about 5 mins and no such problems for me and nothing in my logs. Get back if you require more help.
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