Different refresh rates on Radeon 9000 Pro dual mon

[Jeff Deel]

Hello all. I'm having this problem that's driving me batty. I have two
Dell P780 17" flat trinitron monitors hooked up to my RADEON 9000 Pro
card (obviously one is on the DVI2VGA adapter). Under the control
panel I have both set at a 75 refresh rate. The one on the DVI port is
running that refresh rate, but the one on the standard VGA port (the
one I look at the most) seems to be stuck on 60. The flickering really
sucks. Just so you all know, I've updated to the latest ATI driver and
I tracked down the driver for my monitors. It's still stuck on 60 :-(.
Any help would be greatly appreciated. Thanks.

 

[Carl]

I have a 9600XT running Catalyst 4.1 which keeps reverting to 640x480 @ 60Hz
everytime I reboot Windows. Maybe I'll try running it from the DVI port via
the VGA adapter to see if it's an issue with the primary display port.

 

[Jeff Deel]

Great Carl, give it a try... now does anyone have any clue what could be my problem?

 

[dmac]

just a thought, while under primary display properties go to advanced then
displays and click on secondary. maybe unchecking ddc and change refresh
rate over ride to whatever you need. I have it set as same as desktop and it
stays there at 100 all the time.

 

[Jeff Deel]

Hey Dmac, thanks for your advice, but it's still not working. In fact,
now the second monitor is also stuck on 60 :-(. Man, the flickering is
about to drive me nuts!

 

[dmac]

have you tried dxdiag and under more help-override try to force refresh
rate?

 

[Jeff Deel]

Tried it... one is back on 75, but the other is still stuck on 60. I
wonder if I should try installing the original drivers that came with
it? I know it's not the monitors since I'm running everything through
a KVM switch and it runs at 70 on one and 75 on the other. This is
just crazy... never had this type of problem before.

 

[PhxGrunge]

DDC is not passed thru any KVM switch that I knnow of.
Check both monitors under display properties\advanced\displays to see that
neither is listed as a plug&play monitor.
If so, that is limiting the 60 Hz refresh rate.

 

[Kristin]

DDC is not passed thru any KVM switch that I knnow of.
Check both monitors under display properties\advanced\displays to see that
neither is listed as a plug&play monitor.
If so, that is limiting the 60 Hz refresh rate.

Hi...I am having this same problem with my primary monitor stuck on the 60hz
setting. The monitor in question IS listed as "plug and play" What is the
resolution to this???

Thanks,

kristin

(Apple Cinema Display on PC, 9800pro, XP Home)

 

[dmac]

I may know what happened. this happened to me before. if you go to device
manager do you see 4 (not 2) monitors listed? if 4 are there delete the 2
plug and play monitors and make sure to update the drivers for the remaining
2 from the manufacturer drivers. this happened to me once and the 2 plug and
play were stuck at lower refresh rates.

 

[Kristin]

Dave..

I only have the two monitors listed in device manager. Windows recognizes
the other monitor but the Apple is listed as plug and play. The apple does
not come with its own hardware drivers. ???

kristin

 

[Jeff Deel]

Yeah, I'm only seeing two monitors as well. Got the drivers to work
great with the second monitor, but the first one still wants to be
plug and play... pretty much have to force the driver onto it. I'm
wondering if it might be the KVM switch causing the computer to not
get an accurate reading from the monitor. It's a real pain in the ass
to get behind this particular machine, but I suppose it's worth a try
since the refresh rate adjusts just fine on my other windows machine
with a GeForce 2 card and on my Mac with a GeForce 3. Maybe the ATI
card needs to get a direct connection to set up the drivers properly?
I've tried just about everything where software is concerned!

 

[dmac]

I haven't used a KVM, both mine are straight off the card with a dvi/vga
dongle. maybe that is the problem. sorry I couldn't help you guys more.

 

[dmac]

I'm fresh out of ideas then. maybe apple website has drivers for windows?