BenV's notes

Tag: hdmi

NVidia’s incompetence on HDMI

by on Oct.27, 2012, under Morons, Software

Before today I was still working behind an old 20″ 2006 Acer (al2016W) as primary screen and an even older 17″ secondary screen.
They started to bug me a bit, and after looking around a bit for new screens I ordered 4 new instances of the BenQ GW2450HM.
After reading a very positive review at TFTCentral on the BenQ GW2450HM and
also a forum that was a lot more negative (people who died because of ghosting issues etc) I decided to buy them anyway because they couldn’t possibly
be worse than my current screen.

Today they arrived, so after unpacking them and figuring out how the heck I was going to make space for them on my desk I finally connected them to my PC.
I had windows up and running, which immediately noticed the BenQ that was connected through HDMI. The BenQ happily told me “No Cable Connected” however, but that
was solved by hitting the enter button twice to make it use the HDMI as source instead of the ancient DSUB. They should really stop supplying those connectors.

After unpacking and installing the second screen and connecting it to DVI I noticed a difference.
Both had the same background, but the DVI screen had deeper blacks than the HDMI one!
Nope, it’s not caused by the brightness or any of those knobs, they were identical (factory default) on both screens.

The reason for this is simply: NVIDIA sucks. Hm, that’s a nice trademark that they should register 😉
Yeah, those incompetent assholes again. NVIDIA (sucks) doesn’t care if your left screen looks a bit brighter than your right screen. They only care about getting your money, which is strange because actions like these make it less likely that they’ll receive my money in the future.

Some background on the issue:
When you connect a HDMI device to a NVIDIA (sucks) graphics card, the NVIDIA (sucks) assumes that the device is crippled and can only handle RGB values between 16-235.
Obviously PC monitors can handle the full range of 0-255, which is the default on VGA and DVI. (this is the reason my DVI screen was darker).
This mismatch in communication will fuck up the black colors for starters, but for a real impression check out this forum: http://www.neogaf.com/forum/showthread.php?t=471695
Mind you that the control panel settings that they discuss in that thread didn’t work for me.

Fortunately there’s a solution that does work for me.
This guy over here at metaclassofnil.com wrote a tiny tool to fix your registry and tell the driver to use the full range.
After a reboot everything looks great on BOTH screens 🙂

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