ATI cards and Samsung LCD

I have a ATI Radeon HD 2600 Pro and have had issues on and off with the "mode not supported" on my 40" 1080P Samsung LCD with VGA. I always resolved it with doing a system restore which removed a MS update. This was on the RC realese of Windows 7. Today I installed the final release of W7 and got the issue straight off the bat. I noticed that the MS WDDM 1.1 driver had been installed. BTW it works perfectly with my 22" Philips LCD. I installed the latest ATI driver and had the same issue. I managed to install an older ATI 8.56.1.0.0 driver by booting into safemode and installing (without safemode Windows knows better and tells you the current driver is more recent and won't install). So, conclusion is that the the new graphics standard WDDM 1.1 does not work with my LCD TV. WDDB 1.0 which was used in Vista (and W7 RC) is fine (this is used in the 8.56.1.0.0 driver). I have not been able to find any detail on why or how to resolve this. It sounds like lots of people have this issue but I have not heard anyone diagnose it this way. Does this make sense to anyone else and more importantly, does anyone know a fix?

Awesome with some progress!

Going to try it out with WDDB 1.0

Cheers, flax

EDIT: Hmm, do you mean WDDM?

I have an HIS ATI Radeo 4670 512MB PCIe Adapter and am running Windows 7 Ultimate Edition 64 Bit Version 7600.

Here is what I did to fix it. After trying at least 20 different drivers from ATI's site, I finally ended up going to HIS site.

Download | HIS Graphic Cards

I downloaded the driver with this description:

..................................................................................................
ATI Catalyst: (ref. no: 0812)

Platform: Windows Vista (32bit/64bit)

VISTA Driver Verison: Vista_8.523-080808a-068036C-ATI with WHQL Note: Users must have Microsoft's .NET Version 1.1 Framework prior to installing the ATI driver/Catalyst Control Centre(CCC) components

..................................................................................................

The file name is:

Vista_8.523-080808a-068036C-ATI.zip

This is the Vista driver for an ATI 4670 512 mb PCIe adapter.

Uncompress the file.

1. Boot into Safe Mode.

2. Execute the following from a command prompt to turn on the Windows Installer Service:

REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\MSIServer" /VE /T REG_SZ /F /D "Service"
net start msiserver

REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\Network\Minimal\MSIServer" /VE /T REG_SZ /F /D "Service"
net start msiserver

3. Execute the following from a command prompt to isable Driver Signing:

bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS

4. Open the Device Manager.

5. Left Click and expand "Display adapters".

6. Right Click on the Display Adapter. Example: (ATI Radeon HD 4670)

7. Left Click Update Driver Software.

8. Left Click "Browse my computer for driver software"

9. Left Click "Let me pick from a list of device drivers on my computer".

10. When the window with the prompt "Select the device driver you want to install for this hardware." comes up, uncheck "Show compatible hardware".

11. Left Click "Have Disk".

12. Browse to the directory: "C:\Drivers\ATI\Support\Vista_8.523-080808a-068036C-ATI\Packages\Drivers\Display\LH6A_INF" and click on the inf file "CH_68036.inf"

(That's where I put the uncompressed driver files.)

13. Select your adapter (if necessary).

14. Follow prompts and reboot.

You should now be able to select 1920 x 1080 using your VGA cable.

This is a Vista driver so will be using the WDDM 1.0 driver which I already have working using an older ATI driver. 1920x1080 is perfect over VGA. It is when I use a WDDM 1.1 driver when things break. You ask why bother but I use the Media Centre for our FreeView HD TV and with the old driver channels 4 - 10 don't display. There has been a lot of work done in WDDM 1.1 with DRM for TV.

Anymore idea's would be appreciated though.