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PB G4 goes to sleep every 5 secs

Message #1 - Posted 2006/05/01 - Stefan Aschenbach

Hi, I have a strange problem here. My year old PB G4 tends du do wierd things when it's
woken up from a long time of sleep mode (usually overnight). It presents me the login screen and after login the desktop where I can work nomaly, but it is going
back to sleep after 2 to 5 sec after that. Re-awake, but also restart doesn't help at all.
Because it also failes to calculatet my batterie-lifetime or loadtime while in this state, I suggested it is the Power Managment Unit.

Reseting the PMU (remove batterie and power, press Powerbottun 5ec) helps therefore, but only till the next long sleeping period.

Could that in any way be a software-problem? Will it go away? I have still about 15days of garanty.....

Stefan

Message #2 - Posted 2006/05/01 - matt neuburg

Stefan Aschenbach wrote:

Hi, I have a strange problem here. My year old PB G4 tends du do wierd things when it's
woken up from a long time of sleep mode (usually overnight). It presents me the login screen and after login the desktop where I can work nomaly, but it is going
back to sleep after 2 to 5 sec after that. Re-awake, but also restart doesn't help at all.
Because it also failes to calculatet my batterie-lifetime or loadtime while in this state, I suggested it is the Power Managment Unit.

Reseting the PMU (remove batterie and power, press Powerbottun 5ec) helps therefore, but only till the next long sleeping period.

Could that in any way be a software-problem? Will it go away? I have still about 15days of garanty.....

This has been much discussed. For example:

<http://www.macintouch.com/readerreports/powerbookg4/topic2813.html>

You might try changing your energy saver settings and / or resetting nvram. But it might not help; perhaps a firmware upgrade is needed (from Apple)...?

m.

matt neuburg, phd = matt@tidbits.com, http://www.tidbits.com/matt/ Tiger - http://www.takecontrolbooks.com/tiger-customizing.html AppleScript - http://www.amazon.com/gp/product/0596102119 Read TidBITS! It's free and smart. http://www.tidbits.com

Message #3 - Posted 2006/05/01 - Stefan Aschenbach

You might try changing your energy saver settings and / or resetting nvram. But it might not help; perhaps a firmware upgrade is needed (from Apple)...?

I've set the screensaver and energy saving mode to "Never", resetting PMU was part of my normal
workaround. I will try resetting nvram!

By the way, I found this in the system log:

kernel[0]: Power Management received emergency overtemp signal. Going to sleep.

I've installed Hardware Monitors to log my temps....

Lets hear what the Apple Support has to say about this, I will call them tomorrow.

Message #4 - Posted 2006/05/01 - matt neuburg

Stefan Aschenbach wrote:

You might try changing your energy saver settings and / or resetting nvram. But it might not help; perhaps a firmware upgrade is needed (from Apple)...?

I've set the screensaver and energy saving mode to "Never", resetting PMU was part of my normal
workaround. I will try resetting nvram!

By the way, I found this in the system log:

kernel[0]: Power Management received emergency overtemp signal. Going to

sleep.

Wow.

I've installed Hardware Monitors to log my temps....

Lets hear what the Apple Support has to say about this, I will call them tomorrow.

I'm looking forward to hearing what the resolution is (if any). m.

matt neuburg, phd = matt@tidbits.com, http://www.tidbits.com/matt/ Tiger - http://www.takecontrolbooks.com/tiger-customizing.html AppleScript - http://www.amazon.com/gp/product/0596102119 Read TidBITS! It's free and smart. http://www.tidbits.com

Message #5 - Posted 2006/05/01 - Richard Tomkins

If Apple like other Manufacturers uses fans with a rev counter, and if one or more of your fans were seized, then you would get this type of message fairly soon after the system was up.

At Digital we used fans with rev counters and this type of shutdown usually happened within 5 to 10 seconds of start-up.

Message #6 - Posted 2006/05/03 - Caerus

Let it get the much needed rest and try back later.

http://tinyurl.com/fless

Stefan Aschenbach (stefan0909@freenet.de) wrote:

Hi, I have a strange problem here. My year old PB G4 tends du do wierd things when it's
woken up from a long time of sleep mode (usually overnight). It presents me the login screen and after login the desktop where I can work nomaly, but it is going
back to sleep after 2 to 5 sec after that. Re-awake, but also restart doesn't help at all.
Because it also failes to calculatet my batterie-lifetime or loadtime while in this state, I suggested it is the Power Managment Unit.

Reseting the PMU (remove batterie and power, press Powerbottun 5ec) helps therefore, but only till the next long sleeping period.

Could that in any way be a software-problem? Will it go away? I have still about 15days of garanty.....

Stefan

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