My computer woke me up this morning with a thermal warning. After a
few seconds of investigation I discovered that the CPU fan stopped
spinning. I immediately shut the computer off.

After work, I took the fan off of the heat sink and dropped some oil
into it and even took the TT sticker off of the back and put a drop of
oil onto the end of the shaft.

The fan is working again and spinning strongly. The CPU is running
cool once again. I wanted to put this out there to alert other G4
owners.

--Aaron

Thanks Aaron.

You sure it was not sand from the bench?

What is the temperature and humidity like there?

R&B

Where can you see a thermal warning on a Pegasos II?
I think my G3 freezed once because of temperature while using Linux, but since then no more problems.
/proc/cpuinfo showed >35C, normally its around 25-30C (uncalibrated)...

Hmm good advice! I will take a look at mine to make sure all is well.

Are you a smoker, by chance?

I have a G3 without fan. cat /proc/cpuinfo tells me:
processor : 0
cpu : 745/755
temperature : 32 C (uncalibrated)
clock : 599MHz
revision : 51.17 (pvr 0008 3311)
bogomips : 1199.30
machine : CHRP Pegasos2

But I installed a thermal monitor, and the display shows now 59 degree! Of course, the sensor is over the heat sink. Doing more CPU intensive work it may get up to 66 degree. Still, it never hang up...

By the way, I also took out the fan of my ATI Radeon 7500 and installed a bigger heat sink. It gets around 50 degree. I guess it should be ok ^^; With the fan was about 35 degree.

I think mine is >60 degree, too... because when you touch it, it really is very hot... but I suppose it's designed to work at 60 degrees... I have absolutely no fans in my tower case, so it may be critical when performing cpu intensive stuff during a hot summer days... I have a passive cooled 7500 with 32MB SDRAM , which stays cool in 2D mode...

I had *exactly* the same problem yesterday. Luckily I had installed thermal monitoring - I have probes on the NB and the G4 CPU heatsink. My thermal alarms are set to 55'C/50'C. I heared the alarm go...lo and behold the CPU fan was barely turning.

Luckily I caught it before it got much warmer, as I run dnetc 24/7 it would surely have been toast without those external alarms.

In two minds whether to return module to Genesi or just upgrade the CPU heatsink/fan myself.

Steve

IIRC if the CPU has no heatsink and it's 60 degrees the chip itself will be 70. Most seem to have a limit at something around 90 degrees.

Best bet is to get a huge aluminium heat sink if you want to run it fanless but make sure it's attached properly and not touching anything apart from the CPU - you'll need to read around about how to do this properly.



Thankfully you wont need this sort of cooling:

http://www.theinquirer.net/?article=16247

@BBRV,

Nope, no sand. :)

The high temperature here is always 86-88 and the low is always 77-80.
It's a very temperate climate here. The humidity is pretty high.
It's anywhere between 85% and 100%.

I live in an air conditioned building.

--Aaron

@hitch-hiker,

My Peg is in a Thermaltake Xaser III tower and it has a temperature
probe and it displays the temperature on the fan control unit.

@Neko,

I'm not a smoker and I live in a smoke-free building.

--Aaron