Wrong Colors - NVIDIA FX3400

[Bipasha]

I have two IBM T750 17" monitors configured for twinview - both monitors are functioning correctly, with the right resolution and screens can be stretched across both monitors. But the second monitor (connected to second port on the Graphics card) GUI has weird/wrong colors. How can I fix this? Is it something to do with color depth? Appreciate any help

Thanks in advance.

PS: The workstation has - Red Hat Enterprise Linux WS3 Update3 installed, with NVIDIA Quadro FX 3400 graphics card using NVIDIA driver version 1.0-6629-pkg1.

 

[oppcos]

If you swap the monitors does the problem carry over to the currently working monitor or does it follow the one that currently has the problem. Do the colors look like they are missing one element (missing red, blue, or green), or how are the colors wrong?

I kind of don't think it has to do with the color depth, but some cards use 15bit vs 16bit so if you are using one of those depths that might be related. Still, I would expect the problem to be on both monitors.

You might also download Knoppix or another live CD so you can quickly make sure that it isn't a setting specific in your setup.

 

[Bipasha]

Hi oppcos,

Thanks for your post.

I had earlier tried swapping the monitors and yes the problem carries over to the currently working monitor. That had got me wondering if the port on the FX3400 was dodgy - but I was able to connect two different monitors (IBM T750 and T221) on the same card, with good colored screens on both monitors using twinview.

The faulty colored monitor looks like its missing the blue element since it has a very yellowish blue look (not the normal Linux GUI blue - which the working monitor has). I'm using 24bit color depth.

Thanks

 

[oppcos]

That is strange. Usually a missing element such as blue means that a pin is bent or missing on the cable to the monitor or there is a problem with the graphics card. But if a T221 works fine and swapping T750s makes the problem follow the port, then that's almost seems to be a contradiction of symptoms..

I'm pretty much out of ideas, but I would suggest making sure the refresh rate is set within the T750's preferred range and tweaking the refresh rate and lowering the color depth to see if that effects the problem in any way.