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From: John Varela on 2 Aug 2010 17:16
On Mon, 2 Aug 2010 14:06:21 UTC, Matthew Lybanon
<lybanon(a)earthlink.net> wrote:

> G5 tower running OS X 10.5.8. A few times recently, the fan has run
> away while the computer is in sleep mode. When that happens it does not
> respond to the keyboard or mouse. The only thing I can do (apparently)
> is to kill the power and restart. As far as I can tell nothing is
> damaged when this happens (Disk Utility finds no problems and everything
> works normally after the restart). So it is really just an
> inconvenience--at least so far.

Take a look at the thread "G5: Slow Boot,; Hangs when sleeping" in
this news group, and read http://support.apple.com/kb/HT1767.

--
John Varela
From: Kurt R. Todoroff on 2 Aug 2010 20:40
In article <jollyroger-0B8492.09133702082010(a)news.individual.net>,
Jolly Roger <jollyroger(a)pobox.com> wrote:

> In article <lybanon-4A6A67.09062102082010(a)earthlink.us.supernews.com>,
> Matthew Lybanon <lybanon(a)earthlink.net> wrote:
>
> > G5 tower running OS X 10.5.8. A few times recently, the fan has run
> > away while the computer is in sleep mode. When that happens it does not
> > respond to the keyboard or mouse. The only thing I can do (apparently)
> > is to kill the power and restart. As far as I can tell nothing is
> > damaged when this happens (Disk Utility finds no problems and everything
> > works normally after the restart). So it is really just an
> > inconvenience--at least so far.
> >
> > The last time this happened (yesterday) I checked the logs and found no
> > information about what happened. There are no entries at all with time
> > tags between when I put the computer to sleep and when (several hours
> > later) I restarted. I couldn't find any information about this problem
> > on the Apple website either. The room the Mac is in is air conditioned
> > (the thermostat is set a few degrees higher than in the winter), and I
> > have an external fan blowing heat away from the computer. Yet this
> > still happens occasionally. It has not happened (yet) when the
> > computer is running (not in sleep mode). Can anyone tell me what is
> > happening, and what I can do to prevent further occurrences?

Try booting into single user mode. (Press and hold Command-S after
turning on power. Release these keys once you see the Unix screen.) At
the completion of the boot process, type "exit" at the command prompt
(without the quotation marks), then press return. Two things should
occur. The system will boot into OS X. The fan performance will return
to normal.

Let us know the results.

--


Kurt Todoroff

Markets, not mandates and mob rule.
Consent, not coercion.
From: Matthew Lybanon on 3 Aug 2010 10:09
In article <kurt.r.todoroff-06A7C3.20405702082010(a)nntp.aioe.org>,
"Kurt R. Todoroff" <kurt.r.todoroff(a)comcast.net> wrote:

> In article <jollyroger-0B8492.09133702082010(a)news.individual.net>,
> Jolly Roger <jollyroger(a)pobox.com> wrote:
>
> > In article <lybanon-4A6A67.09062102082010(a)earthlink.us.supernews.com>,
> > Matthew Lybanon <lybanon(a)earthlink.net> wrote:
> >
> > > G5 tower running OS X 10.5.8. A few times recently, the fan has run
> > > away while the computer is in sleep mode. When that happens it does not
> > > respond to the keyboard or mouse. The only thing I can do (apparently)
> > > is to kill the power and restart. As far as I can tell nothing is
> > > damaged when this happens (Disk Utility finds no problems and everything
> > > works normally after the restart). So it is really just an
> > > inconvenience--at least so far.
> > >
> > > The last time this happened (yesterday) I checked the logs and found no
> > > information about what happened. There are no entries at all with time
> > > tags between when I put the computer to sleep and when (several hours
> > > later) I restarted. I couldn't find any information about this problem
> > > on the Apple website either. The room the Mac is in is air conditioned
> > > (the thermostat is set a few degrees higher than in the winter), and I
> > > have an external fan blowing heat away from the computer. Yet this
> > > still happens occasionally. It has not happened (yet) when the
> > > computer is running (not in sleep mode). Can anyone tell me what is
> > > happening, and what I can do to prevent further occurrences?
>
> Try booting into single user mode. (Press and hold Command-S after
> turning on power. Release these keys once you see the Unix screen.) At
> the completion of the boot process, type "exit" at the command prompt
> (without the quotation marks), then press return. Two things should
> occur. The system will boot into OS X. The fan performance will return
> to normal.
>
> Let us know the results.

Thanks to all for their helpful replies. I'll look up the recommended
articles, and the next time the problem occurs I'll follow the
suggestions people made. I hope I didn't give the impression that this
problem occurs frequently. It doesn't. It has only happened a few
times; most of the time I can let the computer sleep for hours
(overnight, for example) without any abnormal behavior. I was wondering
why it happens at all.
From: Jolly Roger on 3 Aug 2010 10:57
In article <lybanon-6D166C.09095603082010(a)earthlink.us.supernews.com>,
Matthew Lybanon <lybanon(a)earthlink.net> wrote:

> In article <kurt.r.todoroff-06A7C3.20405702082010(a)nntp.aioe.org>,
> "Kurt R. Todoroff" <kurt.r.todoroff(a)comcast.net> wrote:
>
> > In article <jollyroger-0B8492.09133702082010(a)news.individual.net>,
> > Jolly Roger <jollyroger(a)pobox.com> wrote:
> >
> > > In article <lybanon-4A6A67.09062102082010(a)earthlink.us.supernews.com>,
> > > Matthew Lybanon <lybanon(a)earthlink.net> wrote:
> > >
> > > > G5 tower running OS X 10.5.8. A few times recently, the fan has run
> > > > away while the computer is in sleep mode. When that happens it does
> > > > not
> > > > respond to the keyboard or mouse. The only thing I can do (apparently)
> > > > is to kill the power and restart. As far as I can tell nothing is
> > > > damaged when this happens (Disk Utility finds no problems and
> > > > everything
> > > > works normally after the restart). So it is really just an
> > > > inconvenience--at least so far.
> > > >
> > > > The last time this happened (yesterday) I checked the logs and found no
> > > > information about what happened. There are no entries at all with time
> > > > tags between when I put the computer to sleep and when (several hours
> > > > later) I restarted. I couldn't find any information about this problem
> > > > on the Apple website either. The room the Mac is in is air conditioned
> > > > (the thermostat is set a few degrees higher than in the winter), and I
> > > > have an external fan blowing heat away from the computer. Yet this
> > > > still happens occasionally. It has not happened (yet) when the
> > > > computer is running (not in sleep mode). Can anyone tell me what is
> > > > happening, and what I can do to prevent further occurrences?
> >
> > Try booting into single user mode. (Press and hold Command-S after
> > turning on power. Release these keys once you see the Unix screen.) At
> > the completion of the boot process, type "exit" at the command prompt
> > (without the quotation marks), then press return. Two things should
> > occur. The system will boot into OS X. The fan performance will return
> > to normal.
> >
> > Let us know the results.
>
> Thanks to all for their helpful replies. I'll look up the recommended
> articles, and the next time the problem occurs I'll follow the
> suggestions people made. I hope I didn't give the impression that this
> problem occurs frequently. It doesn't. It has only happened a few
> times; most of the time I can let the computer sleep for hours
> (overnight, for example) without any abnormal behavior. I was wondering
> why it happens at all.

FYI: The fact that it happens intermittently also points to some sort of
hardware or hardware driver fault.

--
Send responses to the relevant news group rather than email to me.
E-mail sent to this address may be devoured by my very hungry SPAM
filter. Due to Google's refusal to prevent spammers from posting
messages through their servers, I often ignore posts from Google
Groups. Use a real news client if you want me to see your posts.

JR
From: Breaktime on 4 Aug 2010 10:36
In article <lybanon-6D166C.09095603082010(a)earthlink.us.supernews.com>,
Matthew Lybanon <lybanon(a)earthlink.net> wrote:

> In article <kurt.r.todoroff-06A7C3.20405702082010(a)nntp.aioe.org>,
> "Kurt R. Todoroff" <kurt.r.todoroff(a)comcast.net> wrote:
>
> > In article <jollyroger-0B8492.09133702082010(a)news.individual.net>,
> > Jolly Roger <jollyroger(a)pobox.com> wrote:
> >
> > > In article <lybanon-4A6A67.09062102082010(a)earthlink.us.supernews.com>,
> > > Matthew Lybanon <lybanon(a)earthlink.net> wrote:
> > >
> > > > G5 tower running OS X 10.5.8. A few times recently, the fan has run
> > > > away while the computer is in sleep mode. When that happens it does
> > > > not
> > > > respond to the keyboard or mouse. The only thing I can do (apparently)
> > > > is to kill the power and restart. As far as I can tell nothing is
> > > > damaged when this happens (Disk Utility finds no problems and
> > > > everything
> > > > works normally after the restart). So it is really just an
> > > > inconvenience--at least so far.
> > > >
> > > > The last time this happened (yesterday) I checked the logs and found no
> > > > information about what happened. There are no entries at all with time
> > > > tags between when I put the computer to sleep and when (several hours
> > > > later) I restarted. I couldn't find any information about this problem
> > > > on the Apple website either. The room the Mac is in is air conditioned
> > > > (the thermostat is set a few degrees higher than in the winter), and I
> > > > have an external fan blowing heat away from the computer. Yet this
> > > > still happens occasionally. It has not happened (yet) when the
> > > > computer is running (not in sleep mode). Can anyone tell me what is
> > > > happening, and what I can do to prevent further occurrences?
> >
> > Try booting into single user mode. (Press and hold Command-S after
> > turning on power. Release these keys once you see the Unix screen.) At
> > the completion of the boot process, type "exit" at the command prompt
> > (without the quotation marks), then press return. Two things should
> > occur. The system will boot into OS X. The fan performance will return
> > to normal.
> >
> > Let us know the results.
>
> Thanks to all for their helpful replies. I'll look up the recommended
> articles, and the next time the problem occurs I'll follow the
> suggestions people made. I hope I didn't give the impression that this
> problem occurs frequently. It doesn't. It has only happened a few
> times; most of the time I can let the computer sleep for hours
> (overnight, for example) without any abnormal behavior. I was wondering
> why it happens at all.

I've noticed that my Power Mac G5 will sometimes crash a few minutes or
can take up to an hour to happen after having been put to sleep (the
crash causes the fans to come on and run at full speed).

The computer appears to go to sleep normally i.e. the power light
pulses normally indicating that the unit is asleep.

This seems to occur only if spotlight is indexing my HD at the time
that I put it to sleep.

It doesn't happen often but when it does the only way to recover is to
power down the Mac.

It started happening ever since Leopard was installed (currently
running 10.5.8) - not sure if its related to Leopard or not but I
started seeing this happen occasionally about the time I installed
Leopard.

BT
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