GA-MA785GM-US2H resolution oddity

[Parak]

I can't seem to get anything more than 1280x800 out of the onboard DVI connection. I tried in both windows and linux, with the latest catalyst drivers. An ATI addon video card works just fine with the same drivers for higher resolutions. The main symptom is multicolored scan lines on black screen at any higher resolution.

Anyone happen to know what might this be? Should I just RMA it?

Thanks!

 

[bilbat]

Are you d/ling the correct driver set from here:
http://support.amd.com/us/gpudownload/Pages/index.aspx
(the 9.9s are out...

 

[Parak]

Yep, same thing. As I've mentioned it happens on Linux too, so it's not OS dependent

 

[bilbat]

Hmmm... Something is definitely funky here! This is from AMD HD4200 published specs at http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-4000/ati-radeon-hd-4200/Pages/ati-radeon-hd-4200-specificatications.aspx :

"Two integrated DVI display outputs
Primary supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI) or 2560x1600 (dual-link DVI)1
Secondary supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI only)1
Each includes HDCP encoder with on-chip key storage for maximum resolution playback of protected content2
Two integrated DisplayPort™ outputs
Supports 24- and 30-bit displays at all resolutions up to 2560x16001
1, 2, or 4 lanes per output, with data rate up to 2.7 Gbps per lane
Two integrated 400 MHz 30-bit RAMDACs
Each supports analog displays connected by VGA at all resolutions up to 2048x15361
HDMI output support
Supports all display resolutions up to 1920x10801
Integrated HD audio controller with multi-channel (5.1) AC3 support, enabling a plug-and-play cable-less audio solution"

???

 

[bilbat]

Take a look at (or around) this hive, and tell me waht you've got:

 

[Parak]

Here you go:

 

[bilbat]

I'm trying to find out what, either registry-wise, or .xml file-wise, ATI does with the modes it 'discovers' during install; have you taken a peek at the force-list?

 

[SystemPat]

Parak,
What monitor do you have and what settings above 1280x800 is it capable of? Is it a widescreen display? I have been chasing what may be a similar issue.....

 

[Parak]

It's not a problem of not having the mode listed, it's a problem of getting vertical color scan lines whenever I do set the resolution. Catalyst actually picks up all the available resolutions just fine; it's an apple cinema 30", so it lists up to 2560x1600.