Strange dual monitor behavior - ATI X1900 XT

I have a Mac Pro w/ ATI X1900 XT. I replaced the GeForce 7300 GT that came w/ the pro with this X1900 XT as an upgrade from Apple, purchased after the initial system purchase.

I have a 30" Cinema display and a 20" HP LP2065 LCD (very nice, LG/Philips S-IPS panel, just like the 30" ACD).

http://www.blakespot.com/list/images/macprohp_applelcd.jpg

I have some odd behavior on the HP secondary screen. I never sleep the Mac Pro, but do sleep its screens. When they wake, the ACD 30 lights up right away. The HP does sometimes - but about half the time it takes 2-5 minutes for it to light. The LED goes amber to green right away, but the screen is black (and unbacklit) for a few mins. Sometimes I see random blue lines across the blackish screen of the HP before it goes normal. Sometimes it lights fine but I see a "stuck" mouse pointer - either arrow or the spinning wheel - on that 2nd screen, but the REAL pointer that's tied to mouse control is on the ACD 30. Only when I move the mouse to push the real pointer to 2nd screen (HP) does the "stuck" pointer disappear.

Not sure if this is a problem w/ the HP or if it's some odd ATI thing. I had a 20" ACD hooked up as a 2ndary, before going to the 20" HP, and it exhibited none of these issues.

I am using the HP rotated, in portrait mode, as the X1900 drivers support this.

Any thoughts? Thanks.




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