System 7.5 Update 2.0: Monitors & Sound Gamma Settings (5/96)

I have a Power Macintosh 7200/75 computer, System 7.5 Update 2.0, Apple Multiple Scan 15 Display. I recently upgraded to System 7.5.3 by installing the System 7.5 Update 2.0.

I am now using the Monitors & Sound control panel. If I change just the Gamma setting, a prefs file is not created and saved. Likewise, if there is an existing prefs file, it is not updated if I change only the Gamma setting. Why is this happening? How can I work around it?
We were able to reproduce this symptom using a Power Macintosh 7200/75 computer running System Update 2.0 and a 15 Inch Multiple Scan Display.

One workaround we discovered is that if you change both the Resolution as well as the Gamma settings in the Monitors & Sound control panel, it seems to lock in the setting after you restart the computer. This is one way to save the changes you have made.



Published Date: Feb 18, 2012