• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

IPS calibration issue

A

Alienraptor

Weaksauce
Joined
Dec 2, 2004
Messages
117
I just picked up an HP 2311xi from Best Buy, where it's on sale for 169.99, which seemed like a pretty good deal to me.

I brought it home and hooked it up (via a MiniDP-HDMI dongle, since I had a spare HDMI cable) to my 2012 13" MacBook Air.

My problem right now is that if I, for example, pull up the test images at lagom.nl, there is severe white and black clipping (white is clipped above 200, and black is clipped below 20). This is in dramatic contrast to the display unit in the store, which was only clipped for a few frames in that same sample image.

The effect is so strong that I actually deliberately sought out a reference image because it felt so off.

I've tried a few runs of the OS X manual calibration tool to no avail. Tweaking the OSD Brightness, Contrast, and Color settings has absolutely zero effect, while changing the monitor's onboard Gamma or the OS X color profiles can bring about very minor changes.

Does anyone know what's going on here? I haven't tried booting into Windows yet, but so far it seems to me there is a serious issue with the way OS X is managing the gamma, and I have no idea how to fix it.

Thanks!
 
I'm running 10.8 (Mountain Lion), which defaults to 2.2. In any case, switching between the two made no appreciable difference.

I resorted to the (evidently pretty old) Gamma Control tool to manipulate the white and black points directly, which allowed me to recover the whites and blacks. It's not a perfect solution, because it seems to reset itself whenever the computer reestablishes a connection the monitor, but it seems to be working okay. I'm still baffled as to why OS X manages gamma on this monitor so ham-fistedly.

I checked in Windows 7 (via Boot Camp) and it looks normal. It might actually be a little under-saturated, but it's nowhere near as bad as OS X looks by default. I would much, much rather the contrast be a little flat than completely blown out.
 
If the monitor has a dynamic contrast or similar "feature" be sure it is disabled.
 
sadbuttrue said:
Sounds like you're running in HDMI Limited mode (16-235).
Click to expand...

This ^

You need your video card to output RGB over HDMI for 0 - 255 channel brightness levels. You're running in video mode, not RGB mode (basically)
 
10e said:
This ^

You need your video card to output RGB over HDMI for 0 - 255 channel brightness levels. You're running in video mode, not RGB mode (basically)
Click to expand...

That sounds promising. But how do I do it? Google has been unhelpful.
 
You must log in or register to reply here.
Back
Top