Apple 21" Cinema Display connected to MacBook 10.4.11 in mirror mode: 
how to turn the Cinema Display off, or turn its brightness down to zero, 
without disconnecting (or unpowering) it?

[There's a brightness slider in the Cinema prefs panel, but it only dims 
the Cinema Display a bit, far from fully off.]

In article <siegman-A45AF5.22532022112008@news.stanford.edu>,
 AES <siegman@stanford.edu> wrote:

> Apple 21" Cinema Display connected to MacBook 10.4.11 in mirror mode: 
> how to turn the Cinema Display off, or turn its brightness down to zero, 
> without disconnecting (or unpowering) it?
> 
> [There's a brightness slider in the Cinema prefs panel, but it only dims 
> the Cinema Display a bit, far from fully off.]

Don't know about that model, but mine has a proximity switch on the 
side.  The Displays:Options Preferences panel selects what that switch 
does.

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In article <492911af$0$95507$742ec2ed@news.sonic.net>,
 Kevin McMurtrie <kevinmcm@sonic.net> wrote:

> In article <siegman-A45AF5.22532022112008@news.stanford.edu>,
>  AES <siegman@stanford.edu> wrote:
> 
> > Apple 21" Cinema Display connected to MacBook 10.4.11 in mirror mode: 
> > how to turn the Cinema Display off, or turn its brightness down to zero, 
> > without disconnecting (or unpowering) it?
> > 
> > [There's a brightness slider in the Cinema prefs panel, but it only dims 
> > the Cinema Display a bit, far from fully off.]
> 
> Don't know about that model, but mine has a proximity switch on the 
> side.  The Displays:Options Preferences panel selects what that switch 
> does.


Never noticed that before!   On the right side, near the bottom, totally 
flush with the surface.

Holding a finger on the "�" button brings an icon with a progress bar 
which gradually turns black all the way from right side to left side.

But, no matter how long you hold the button, the screen itself only dims 
by, I'd say, about 30% -- that is, down to maybe 70% of max brightness, 
still more than bright enough to use the monitor (or to keep the room 
dimly but definitely illuminated at night).

The corresponding screen dimmer F1 key on the keyboard of the MacBook 
that's driving the Cinema Display, when held down, dims the MacBook 
screen all the way to black.

In article <siegman-A45AF5.22532022112008@news.stanford.edu>,
 AES <siegman@stanford.edu> wrote:

> Apple 21" Cinema Display connected to MacBook 10.4.11 in mirror mode: 
> how to turn the Cinema Display off, or turn its brightness down to zero, 
> without disconnecting (or unpowering) it?
> 
> [There's a brightness slider in the Cinema prefs panel, but it only dims 
> the Cinema Display a bit, far from fully off.]

You may not be able to turn it off manually. Some older models of 
Apple's cinema display (perhaps combined with certain versions of Mac OS 
X) do not allow you to turn the display off with the physical power 
button.

For instance, I'm still using my trusty, old (plastic bezel) 23" cinema 
display with Mac OS X 10.5 on my Mac Pro:

<http://jollyroger.kicks-ass.org/cinemadisplay.gif>

On my Mac Pro, with these settings, pressing the power button on the 
front of my cinema display does absolutely nothing:

     System Preferences > Displays > Options:
     [ ] Disable power button
     [*] Disable display preferences button

     System Preferences > Energy Saver > Options:
     [ ] Allow power button to sleep the computer

That said, you can have the display go to sleep automatically (by using 
the settings in the Energy Saver control panel). 

And you can invoke the screen saver / energy saver display sleep 
manually by choosing the Keychain Access menu item > Lock Screen command.

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JR

In article <siegman-A82749.08030023112008@news.stanford.edu>,
 AES <siegman@stanford.edu> wrote:

> In article <492911af$0$95507$742ec2ed@news.sonic.net>,
>  Kevin McMurtrie <kevinmcm@sonic.net> wrote:
> 
> > In article <siegman-A45AF5.22532022112008@news.stanford.edu>,
> >  AES <siegman@stanford.edu> wrote:
> > 
> > > Apple 21" Cinema Display connected to MacBook 10.4.11 in mirror mode: 
> > > how to turn the Cinema Display off, or turn its brightness down to zero, 
> > > without disconnecting (or unpowering) it?
> > > 
> > > [There's a brightness slider in the Cinema prefs panel, but it only dims 
> > > the Cinema Display a bit, far from fully off.]
> > 
> > Don't know about that model, but mine has a proximity switch on the 
> > side.  The Displays:Options Preferences panel selects what that switch 
> > does.
> 
> 
> Never noticed that before!   On the right side, near the bottom, totally 
> flush with the surface.
> 
> Holding a finger on the "�" button brings an icon with a progress bar 
> which gradually turns black all the way from right side to left side.
> 
> But, no matter how long you hold the button, the screen itself only dims 
> by, I'd say, about 30% -- that is, down to maybe 70% of max brightness, 
> still more than bright enough to use the monitor (or to keep the room 
> dimly but definitely illuminated at night).
> 
> The corresponding screen dimmer F1 key on the keyboard of the MacBook 
> that's driving the Cinema Display, when held down, dims the MacBook 
> screen all the way to black.

Below the + and - marks should be a power icon. Touch it to switch the 
display on/off.

Check the monitor's documentation; it tells you how to configure the 
switch; 

  - Open System Preferences, click Displays, go to the Options tab, and 
under Display Power Button select "Turns the display on and off". 

The little touch-sensitive dimple on the lower right side of the display 
will now control the power of the display only, independently of the 
computer.

In article <sehix-849D99.14422823112008@news.speakeasy.net>,
 Steve Hix <sehix@NOSPAMspeakeasy.netINVALID> wrote:

> 
> Below the + and - marks should be a power icon. Touch it to switch the 
> display on/off.
> 
> Check the monitor's documentation; it tells you how to configure the 
> switch; 
> 
>   - Open System Preferences, click Displays, go to the Options tab, and 
> under Display Power Button select "Turns the display on and off". 
> 
> The little touch-sensitive dimple on the lower right side of the display 
> will now control the power of the display only, independently of the 
> computer.

Lovely!  Thank you.

In article <sehix-849D99.14422823112008@news.speakeasy.net>,
 Steve Hix <sehix@NOSPAMspeakeasy.netINVALID> wrote:

> Check the monitor's documentation; it tells you how to configure the 
> switch; 
> 
>   - Open System Preferences, click Displays, go to the Options tab, and 
> under Display Power Button select "Turns the display on and off". 
> 
> The little touch-sensitive dimple on the lower right side of the display 
> will now control the power of the display only, independently of the 
> computer.

It really ticks me off that this checkbox isn't there in my System 
Preferences > Displays > Options panel for my cinema display!  

I've become accustomed to just leaving it on and letting Energy Saver do 
its thing; and luckily I don't have any USB peripherals that tend to 
spontaneously wake the display from sleep. But it sure would be nice to 
have a power switch that actually does what power switches are supposed 
to do!

Damn you, Apple!  >: (

-- 
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

In article <siegman-A1530B.16424123112008@news.stanford.edu>,
 AES <siegman@stanford.edu> wrote:

> In article <sehix-849D99.14422823112008@news.speakeasy.net>,
>  Steve Hix <sehix@NOSPAMspeakeasy.netINVALID> wrote:
> 
> > 
> > Below the + and - marks should be a power icon. Touch it to switch the 
> > display on/off.
> > 
> > Check the monitor's documentation; it tells you how to configure the 
> > switch; 
> > 
> >   - Open System Preferences, click Displays, go to the Options tab, and 
> > under Display Power Button select "Turns the display on and off". 
> > 
> > The little touch-sensitive dimple on the lower right side of the display 
> > will now control the power of the display only, independently of the 
> > computer.
> 
> Lovely!  Thank you.

Oh, and I assumed that you were referring to the 20" Cinema Display, and 
your 21" was a typo.

If not...