Mac Pro + Dual 27" Cinema Displays brightness & brightness control Hardware:


Mac Pro 4.1 (circa 2009)
AMD Radeon HD 7950 3072 MB graphics card


I have just connected dual 27" Cinema Displays.

Both work, lots of display space ;-)

Two problems (perhaps related):


F1 &amp; F2 keys only adjust brightness on the primary display.
2nd display about (purely estimated) 92% of the brightness of the primary display and just a bit too dim to feel comfortable.  While perhaps just the difference in ages and use of the 2 displays, I wonder if something else might have gone awry?


Any way to adjust brightness of both displays from my keyboard?

Any other adjustment I can make to the brightness of the 2nd display.
Just discovered a solution to Problem 1.

Control + (F1 or F2) adjusts the brightness of the secondary display.

Still working on problem #2