DVI-->HDMI problem with an XFX 8600GT

[Fallenan6el77]

Currently I've been pulling out my hair trying to get my L246WP LCD monitor to work with an XFX 8600GT video card. The analog connection doesn't have a problem. The DVI --> HDMI connection works fine when using the default windows drivers.

Once I installed the nvidia forceware drivers things go down the tube. I've tried multiple versions from 160 to to the latest drivers. The system is running windows vista.

From what I gather, the problems are as follows:
The xfx 8600gt supports true HDMI opposed to DVI w/HDCP
Windows vista is trying to communicate with the LCD as if it is an HDTV

From a seperate threat I found this screenshot:
http://img62.imageshack.us/img...127/assinineboxma4.jpg

For one, I don't have "Run display optiization wizard" or "Manage custom resolutions" in my menu. I do have several more options under video & television.

I believe "Treat as HDTV" is being checked by default and I can't seem to access it with any of the vista drivers I've tried installing.

It's really quite annoying because I can't use the true 8bit colors or enable sRGB if I'm using my analog connection.

The biggest symptom of the problem is when runninng using the dvi-hdmi cord, the screen is cut off on the right side by about an inch. I've tried using 1080p or 1080i or custom, but all would have some cut off. I think it would actually work if only it would recognize the monitor as a monitor instead of an HDTV

 

[ExplodingSidewalk]

Fallenan6el77,

Have you been able to solve this issue concerning your L246W-BN monitor?

Unfortunately, I have been having the same issue with my L246W-BN and MSI NX8600GT-T2D256E OC hooked up via DVI -> HDMI supplied cable. I am using the latest drivers from Nvidia and latest monitor drivers from LG.

It seems the L246WP-BN recognizes my PC as a Video Input (DVD/TV/etc.) and therefore shifts the screen to the left hiding the start menu completely. I have tried installing previouse versions of nvidia drivers with no success.

I have tried hooking up my notebook (dvi out) with an ATI Mobility X700 and the L246WP-BN works correctly displaying 1920 x 1200.

I have tried hooking up the LG246WP-BN via vga (analog) cable and the LG246WP-BN works correctly displaying 1920 x 1200 with no screen cutoff.

I also hooked up a BenQ FP241W dvi -> hdmi and that worked great displaying 1920 x 1200 with no screen cutoff.

It seems the LG246WP-BN is not recognizing that a pc is hooked up, not a TV or other device.

 

[Fallenan6el77]

I believe the problem lies with the nvidia drivers, not the LG246WP-BN. The standard vista drivers worked fine with the dvi-->hdmi connection for the LG246WP-BN. Once any version of nvdia forceware drivers are installed, the pc recognizes the lcd monitor as an hdtv and the shifting problem appears.

 

[taltamir]

the standard drivers? what resolution were you running at? normally DVI > HDMI conversion is limited in resolution.
Is it a monitor or a TV? i have never heard of a monitor with HDMI plug but no DVI.

 

[Fallenan6el77]

The monitor is an LG246WP. Yeah it's a bit weird but it only has 1 HDMI and 1 analog plug. It comes with an DVI-->HDMI adaptor plug. I believe the LCD monitor is using a high quality MVA or PVA panel. It's not a TV.

The standard drivers I referred to is whatever windows vista uses by default before any nvidia forceware drivers are installed. This is for the native resolution of 1920x1200

 

[semenov]

ExplodingSidewalk, Fallenan6el77
I'm having exactly the same problem with Palit Sonic 8800GT card. I tried latest WHQL & beta Forceware drivers using both XP and Vista.

You can see the same problem discussed:
http://forums.guru3d.com/showthread.php?t=235174
http://forums.nvidia.com/index.php?showtopic=48955

That's definitely a driver issue, as the default built-in Vista driver works flawlessly in 1920x1200 using DVI->HDMI cable. nVidia doesn't seem to care though.

 

[hans007]

i also have this problem with my LG246WP and a 9600gt.


I found that it works fine on the 2nd dvi output, but on the main one goes all wierd. If your 8600gt has another DVI try that.

 

[ginfest]

Originally posted by: Fallenan6el77
I believe the problem lies with the nvidia drivers, not the LG246WP-BN. The standard vista drivers worked fine with the dvi-->hdmi connection for the LG246WP-BN. Once any version of nvdia forceware drivers are installed, the pc recognizes the lcd monitor as an hdtv and the shifting problem appears.

That is exactly the problem:thumbsup:
I have researched this and found a cure, for the curious there are threads at Guru3D, the NV forums and elsewhere with this same issue.
Here is what cured it for me (taken from a post at NV although I have seen this solution posted elsewhere also.

I've discovered a workaround for this problem. Basically you can use a registry key to override the monitor advertising itself as an HDTV (by setting the number of EDID extensions to 0). Using the following steps, I am now getting proper 1920x1200 resolution on my LG monitor:

1. Start the installation of the latest Nvidia drivers and cancel out once the files are extracted
2. Open nv_disp.inf. By default for the current drivers this is in C:\NVIDIA\WinVista\169.25
3. In the [nv_SoftwareDeviceSettings] section add the following:
CODE
HKR,, OverrideEdidFlags0, %REG_BINARY%, 1E,6D,3F,56,00,00,FF,FF,04,00,00,00,7E,01,00

NOTE
The first 4 bytes (1E,6D,3E,56) in my OverrideEdidFlags0 are specific to the LG monitor I'm using. For other monitors, you will need to replace them. Using Phoenix EDID Designer (Google it), extract the current EDID and open up the byte viewer. The bytes are in byte 8 through 11.

4. Uninstall your current drivers and reboot
5. Install the modified drivers by running the previously extracted setup.exe. By default for the current drivers this is in C:\NVIDIA\WinVista\169.25. You'll get a warning about the driver not being signed because of the modified inf. Just press OK.

 

[jcmuse]

wow thanks for this post. i actually have this same prob with a westy 24" and 8600gt. I will try this fix and report back.

 

[hans007]

Originally posted by: jcmuse
wow thanks for this post. i actually have this same prob with a westy 24" and 8600gt. I will try this fix and report back.

yah this fixed worked for me on my LG also. i've heard a lot of other hdmi monitor users had this problem , such as people with the 28" hans-g or whatever.


the setting is different for other monitor brands than LG though, you have to get your edid or whatever.

the tool actually did not work for me, but since i had the same monitor as the guy who wrote that post i just used his setting.