Kevin Diggs wrote:
Hi,
I have a water cooled dual 2.5 GHz G5 (Powermac7,3). It has YDL 6.0
on it. Using the stock YDL 2.6.23 kernel this machine "appears" to work
fine.
After finally getting it to boot under 2.6.27, it will shut itself
off if put under any significant load. And it is doing it very quickly.
Like within a few seconds of becoming busy. I just discovered it is
spitting out messages about "temperature way above maximum" (from
therm_pm72.c).
This one has the Panasonic cooling system. I have checked behind the
cover and see no evidence of leaks.
When put under load under the stock YDL kernel, the cpu fans will
speed up for about 2 minutes. Then over the next minute or so they will
slow down almost to idle. Thereafter a whirring sound can be heard every
15 to 30 seconds lasting about 5 seconds. Which I am guessing is the
pump? The exhaust air barely gets warm?
If I run:
while true; do
echo -n "cpu0\: "; cat cpu0_temperature;
echo -ne "\t"; cat cpu0_current; echo "";
echo -n "cpu1\: "; cat cpu1_temperature;
echo -ne "\t"; cat cpu1_current;
echo ""; sleep 1;
done
in one window and:
time /home/kevdig//r-970 -b4 -s1|nice -19 bzip2 -9v|dd bs=4b
count=400000 of=/dev/null
in two others I see different results between 2.6.23 and 2.6.27. Under
the stock YDL 6.0 2.6.23 kernel, the temperatures level off at 50 and
70. Peak temps are about 56 and 76. Idle temps are about 46 and 54.
Under 2.6.27, if I run ONE I see cpu1 temps range from 74 -> 89 -> 105
-> 111 -> 86. All one second apart. This happened pretty fast. Once I
saw the 111 I ^c'ed the process. Can the temp really change that fast?
kevin
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