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OK why doesn't my Powerbook go to sleep

Message #1 - Posted 2005/08/18 - ray

1.25Ghz with Tiger and all the updates except the latest security one. All of a sudden it will not go to sleep.
It tries, but immediately wakes up.
I've logged out and in, and shut down and restarted, to no avail.

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http://www.dream-weaver.com/email.html iChat AV datasmog7

Message #2 - Posted 2005/08/18 - Richard Tobin

Previously, ray wrote:

1.25Ghz with Tiger and all the updates except the latest security one. All of a sudden it will not go to sleep.
It tries, but immediately wakes up.

Have you recently started using a bluetooth mouse?

-- Richard

Message #3 - Posted 2005/08/19 - Chris Ridd

On 19/8/05 12:13, in article de34lu$1l55$1@pc-news.cogsci.ed.ac.uk, Richard Tobin wrote:

Previously, ray wrote:

1.25Ghz with Tiger and all the updates except the latest security one. All of a sudden it will not go to sleep.
It tries, but immediately wakes up.

Have you recently started using a bluetooth mouse?

I use a BT mouse, but have the BT pref pane configured so that devices do not wake the computer. I didn't fancy what would happen when I put the two together in a laptop bag :-))

Cheers,

Chris

Message #4 - Posted 2005/08/19 - ray

Richard Tobin wrote:

Previously, ray wrote:

1.25Ghz with Tiger and all the updates except the latest security one. All of a sudden it will not go to sleep.
It tries, but immediately wakes up.

Have you recently started using a bluetooth mouse?

No.
Sussed it. I have a small unpowered USB hub in one of the ports. It takes the mouse, scanner and card reader. I also had a USB extension lead plugged in which feeds the printer, although it wasn't plugged into the printer. That was the problem. Unplug the extension lead and the Pboko sleeps.

to email me please go here
http://www.dream-weaver.com/email.html iChat AV datasmog7

Message #5 - Posted 2005/08/19 - zoaran substitute

ray wrote:

Richard Tobin wrote:

Previously, ray wrote:

1.25Ghz with Tiger and all the updates except the latest security one. All of a sudden it will not go to sleep.
It tries, but immediately wakes up.

Have you recently started using a bluetooth mouse?

No.
Sussed it. I have a small unpowered USB hub in one of the ports. It takes the mouse, scanner and card reader. I also had a USB extension lead plugged in which feeds the printer, although it wasn't plugged into the printer. That was the problem. Unplug the extension lead and the Pboko sleeps.

Why does USB cause so many problems with sleep? Is it the fault of the protocol or the implementation?

-zoara-

Message #6 - Posted 2005/08/19 - Antony Lacey

zoaran substitute wrote:

Why does USB cause so many problems with sleep? Is it the fault of the protocol or the implementation?

No idea, but I'd guess the implementation. How else would turning my printer off wake the computer from sleep?

Why would anyone think the signal from the printer being switched off would need to wake the computer? It should be ignored - if it were being switched on that may be a good time to wake the computer.

Antony
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Message #7 - Posted 2005/08/19 - Peter Ceresole

Antony Lacey wrote:

No idea, but I'd guess the implementation. How else would turning my printer off wake the computer from sleep?

Removing *any* usb device wakes any of my machines. And I just checked- switching off my printer (DJ840c, impeccably behaved at all times) wakes my iG5 too.

Clearly it sends a signal to the Mac at a fundamental level that it can't ignore. Which sounds like usb, all right.

Peter

Message #8 - Posted 2005/08/19 - Tim Hodgson

Peter Ceresole wrote:

Antony Lacey wrote:

No idea, but I'd guess the implementation. How else would turning my printer off wake the computer from sleep?

Removing *any* usb device wakes any of my machines. And I just checked- switching off my printer (DJ840c, impeccably behaved at all times) wakes my iG5 too.

Clearly it sends a signal to the Mac at a fundamental level that it can't ignore. Which sounds like usb, all right.

I seem to remember reading that that's an oddity of Apple's USB implementation - possibly a side-effect of ensuring that devices are mounted/unmounted automatically?

TimH
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Message #9 - Posted 2005/08/20 - RichardK

zoaran substitute wrote:

ray wrote:

Richard Tobin wrote:

Previously, ray wrote:

1.25Ghz with Tiger and all the updates except the latest security one. All of a sudden it will not go to sleep.
It tries, but immediately wakes up.

Have you recently started using a bluetooth mouse?

No.
Sussed it. I have a small unpowered USB hub in one of the ports. It takes the mouse, scanner and card reader. I also had a USB extension lead plugged in which feeds the printer, although it wasn't plugged into the printer. That was the problem. Unplug the extension lead and the Pboko sleeps.

Why does USB cause so many problems with sleep? Is it the fault of the protocol or the implementation?

PowerBooks (and iBooks, probably) assume that if there is a USB device plugged in, they must be expected to run in headless mode.

Richard

RichardK - 1980s in a can. http://www.dmc12.demon.co.uk/music/ Retro computing - http://www.dmc12.demon.co.uk/retrotech/ Cars - 2004 Beetle Cabrio, 1989 Supra 3.0i, 1990 Sera, 1989 Volvo 740 MidiGuitar, AU/X. Apple 77-04. See links. Email - upgrade to 128 ;)

Message #10 - Posted 2005/08/20 - Antony Lacey

Peter Ceresole wrote:

Ah, now I see why it may be USB, if that signal is non-distinguished - just a 'something's changed' type, then there would be little the computer could do about it.

Yes. And the fact that sleep isn't 'off'.

Good point, I always think of it as off because it's how I generally leave both my laptop and G5 now, rather than shutdown.

It's much better than waiting for them to start up each time.

Antony
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