„Software to change the dithering configuration of Intel graphics in notebooks to improve the image quality of the built-in display.” - quote from download page of ditherig
Temporal Dithering Sensitivity - My Solution
Alyosha2001 Yup, untested for desktops.
Speaking of which. I know how "dithering" works and it might be possible to produce an OSX and Linux version in the future.
8 days later
Alyosha2001 I asked because I wonder shouldn't this be a good indicator wheather it is on or off, as I don't think there are many true 8 bit displays, especially on laptops.
Yes (assuming display is 6+2 bit) aka dithering
I wonder if HP DreamColor displays are native 8-bit.
5 days later
I had dreamcolor on Elitebook 8560w, take a look at the flickering on it. It was constant flicker, not like PWM linked to brightness settings, flickering all over the place. I believe so are all, because I don't think the technology permits true 10bit displays. I haven't even met an 8 bit one. If anyone knows any, PWM and dithering free IPS, please let us know, (let's try to make a list or something) 
For example, I know AU Optronics B156HAN01 is IPS PWM free, with dithering disabling via this tweak (banding occurs, not true 8 bit)
Alyosha2001 That looks like some sort of LCD polarization between the camera lens and the LCD film layer?
No, it's just flickering in all three base colors (it is RGB led illuminated)
JTL And so are the majority of the illuminated keyboards, rgb or white, they use PWM dimming,too
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Alyosha2001 I don't like backlit keyboards, then again I am a touch typist so I don't even need them 
Wonder if a newer HP laptop would be different in regards to the Dreamcolor display. I might be able to visit a friends company that uses a lot of HP Elite/ZBook laptops and see.
Please let us know. A far as I know, the current Zbooks (G2, G3 and G4) all use PWM dimming on regular IPS-s
JTL I think you would need a DSLR or mirrorless for that, the high frequency PWM are hard to distinguish on smartphone cameras. I highly doubt a flicker free Dreamcolor exists
Alyosha2001 I have a Canon 80D that can do at least 1/4000 shutter speed.
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JTL There is also a method to determine PWM frequency using a black image with a vertical white line and a DSLR using a pan shoot. Details of the test can be found here, under the testing and interpretation section http://www.tftcentral.co.uk/articles/pulse_width_modulation.htm
In essence, you take a picture of the line while panning the camera, and then count the resulting lines if PWM is present. Else there should be just a blured line (if no PWM)
Alyosha2001 Been there, done that.
Alyosha2001 Check my other thread on how to build homemade oscilloscope and you dont have to do any more of these stupid tests
Ive done them too and wasted a lot of time. They rarely give any real proof and just confuse you more.
martin Very interesting DIY! I have access to an electronic osciloscope, but this seems very handy, except the part with overvoltage
ditherig 1.8 is out, it still enables default dithering back aftter the screen goes off and back on, using Intel HD Graphics 530
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Alyosha2001 I dont understand one thing. If the notebook displays are 6bit with FRC (dithering) to make it look 8bit and instead of actual 256k colors seem like they have 16,7 million, how does turning on ditherig doesnt make the display look like crap all of a sudden?
Is there any way to find email on that guy who did the ditherig? Cannot find it anywhere.
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martin Basically, "ditherig" just turns off the Intel chip CALLING for dithering. Whatever the display has to do in order to fake the colors still happens, irrespective. The Intel chipset has dithering locked on during the output phase at all times, whatever the output device is.
The issue here is that both the chip AND the display are dithering/flickering/PWM'ing/etc. There are so many sources of flicker/pain that it's hard to eliminate them all.
When I once talked in the nouveau* IRC channel with one of the devs, he said they enabled temporal dithering for notebook displays by default because notebook displays don't dither and so they need software dithering. He might be wrong or his knowledge might be outdated though. But if he's right, the color drop should be obvious and result in visible banding.
* (an alternative open source NVIDIA driver)
martin I've attatched 2 pictures on november the 17th, take a look at them, in my case the banding (when the dither is off) is obvious