Display Sleep Schedule Problem

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,( System Pref - Energy Saver ) but it doesn't come on. I can use a Hot Corner to put the Display into sleep mode but cannot schedule it. Anyone else had this problem?

Have since found the cause- a USB printer that is normally on allways. Switch off - problem sorted.

On 29/07/2012 14:16, in article CC3AF627.51721%welshgas@virginmedia.com, WelshGas wrote:

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,( System Pref - Energy Saver ) but it doesn't come on. I can use a Hot Corner to put the Display into sleep mode but cannot schedule it. Anyone else had this problem?

Have since found the cause- a USB printer that is normally on allways. Switch off - problem sorted.

Updated software from Canon and now Printer./scanner can be left on without interfering with the Display Sleep Schedule

WelshGas wrote:

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,

Note that with modern screens the "screen saver" is no longer needed and has the opposite effect since it uses more CPU and GPU power to draw the animations.

Try disabling the screen saver and just go for the screen sleep function at 5 minutes.

Previously, JF Mezei wrote:

WelshGas wrote:

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,

Note that with modern screens the "screen saver" is no longer needed and has the opposite effect since it uses more CPU and GPU power to draw the animations.

Try disabling the screen saver and just go for the screen sleep function at 5 minutes.

I've been doing that for ages simply because I find screen saver animations incredibly annoying. Before Apple offered screen sleep, I used the Basic Black screen saver.

On Thu, 02 Aug 2012 10:59:47 -0400, Barry Margolin wrote:

Previously, JF Mezei wrote:

WelshGas wrote:

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,

Note that with modern screens the "screen saver" is no longer needed and has the opposite effect since it uses more CPU and GPU power to draw the animations.

Try disabling the screen saver and just go for the screen sleep function at 5 minutes.

I've been doing that for ages simply because I find screen saver animations incredibly annoying. Before Apple offered screen sleep, I used the Basic Black screen saver.

I have always used Blank Screen instead of animated screen savers, irrespective of platform.

On 02/08/2012 16:16, in article 58iqe9-3b5.ln1@news1.chingola.ch, Paul Sture wrote:

On Thu, 02 Aug 2012 10:59:47 -0400, Barry Margolin wrote:

Previously, JF Mezei wrote:

WelshGas wrote:

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,

Note that with modern screens the "screen saver" is no longer needed and has the opposite effect since it uses more CPU and GPU power to draw the animations.

Try disabling the screen saver and just go for the screen sleep function at 5 minutes.

I've been doing that for ages simply because I find screen saver animations incredibly annoying. Before Apple offered screen sleep, I used the Basic Black screen saver.

I have always used Blank Screen instead of animated screen savers, irrespective of platform.

Didn't matter if the Screensaver was On or Off the Display Sleep function Schedule would not work, only using a Hot Corner on the screen would put the Display to sleep. Now having tracked the problem to my Canon MP272 printer/scanner and having updated the Canon software does the Display Screen schedule work as intended under 10.8.

In message WelshGas <welshgas@virginmedia.com> wrote:

On 02/08/2012 16:16, in article 58iqe9-3b5.ln1@news1.chingola.ch, Paul Sture wrote:

On Thu, 02 Aug 2012 10:59:47 -0400, Barry Margolin wrote:

Previously, JF Mezei wrote:

WelshGas wrote:

Installed 10.8 on my 2008 24" iMac without any problems EXCEPT for the fact that the Display Sleep function does not seem to work. I have Screensaver to come on after 5 mins and Display Sleep after 15mins,

Note that with modern screens the "screen saver" is no longer needed and has the opposite effect since it uses more CPU and GPU power to draw the animations.

Try disabling the screen saver and just go for the screen sleep function at 5 minutes.

I've been doing that for ages simply because I find screen saver animations incredibly annoying. Before Apple offered screen sleep, I used the Basic Black screen saver.

I have always used Blank Screen instead of animated screen savers, irrespective of platform.

Didn't matter if the Screensaver was On or Off the Display Sleep function Schedule would not work, only using a Hot Corner on the screen would put the Display to sleep. Now having tracked the problem to my Canon MP272 printer/scanner and having updated the Canon software does the Display Screen schedule work as intended under 10.8.

For future reference, Shift-Control-Eject will put the display to sleep immediately.