10.6.8: iMac 27" as external monitor runs at maximum brightness

Originator:nherring
Number:rdar://9832321 Date Originated:24-Jul-2011 09:41 PM
Status:Open Resolved:Duplicate of 9726669
Product:Mac OS X Product Version:10.6.8 10K540
Classification:UI/Usability Reproducible:Always
 
Summary:
Since the update to 10.6.8, when I connect my MacBook Pro to run my 27" iMac as an external display, the display runs at maximum brightness without any ability to change it.

Steps to Reproduce:
1. Plug MacBookPro6,2 into iMac11,1 with the mini-DVI cable.

Expected Results:
The brightness level should be the same setting last set on the MacBook Pro, and should be changable via the Displays prefs panel.

Actual Results:
Brightness is maximum. It cannot be changed, AFAICT.

Regression:
This used to work as of 10.6.7.

Comments


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