Prismatik HDR bug - Light blinking when moving mouse

[nhac-lly]

I have the issue here: https://www.youtube.com/watch?v=NgSb_JKcttU
FYI the controller is CH340 chinese one.

[MegaVat30]

Same here. I have used ATmega328 CH340 Chinese replica and 2-3 days from installing everything was working normally, but suddenly the LEDs start flickering with different colors when I move the mouse. And it only happens when any window or app are running in fullscreen.

[psieg]

Is it related to HDR? Does it occur if HDR is disabled?

[nhac-lly]

@psieg Yes, it's HDR related since it's does not happened on SDR. My workaround is to have mouse trail enabled, I guess it's linked to refresh rate.

[sblantipodi]

I have the same problem here:
#355

[sblantipodi]

the problem happen if your grab interval is "too fast" for what your PC can capture.

If you can capture at 30FPS, set the grab interval under 33ms,
if you can capture at 60FPS, set the grab interval under 16ms...

this is not a solution but a workaround, it should work.

and it is another reason why I don't understand how nvidia can deprecate NVFBC.
#235 (comment)

[zomfg]

Try running this build with flashes and without.
It should save frames in your %tmp%. Hopefully we'll be able to see what's going on.
Save frames in between sessions as it'll override the previous ones (don't run long sessions, depending on your disk space)

[sblantipodi]

I see nothing strange in the image produced by your build zomfg.

Imho the problem isn't in the capturing step but in the output of the software from the PC to the microcontroller.
Most probably it's not even a problem of the software that sends data to the microcontroller but simply in the transmission that isn't synced well.

I was able to reproduce the problem on a software written by my own.

the problem is that some "dirty transmission" isn't blocked by the checksum check you use before displaying the colors on the led strip.
It's not a big problem thoug, it happen every three or four minutes and it last the time of a lightning.

[zomfg]

if by checksum you mean the 3 bytes after "Ada", that only applies to the led count, the color values aren't taken into account
if you set logs to 2, that'll log the color values the are sent to the device, if you can capture it while running something like this, maybe we'll see some pattern...

[jespertheend]

I'm pretty sure this is unrelated to sending data to the microcontroller. I am using Prismatik without any external ledstrip connected to my computer. Instead I use the socket api that comes with Prismatik to send the color values to my own application, which then sends http requests to my lights. I'm seeing the same issue without any microcontroller for a ledstrip.
In fact, if you look at the device tab, you can see the colors turning black sometimes.

Or at least, that's how it used to be for me anyway. I can't seem to replicate it anymore now, I recently switched from an amd card to one from nvidia, so perhaps that's related.

[sblantipodi]

Don't know what happened but I have the same problem of the opener. Prismatik is unusable when HDR is on

[MegaVat30]

In my case, the problem was solved by replacing all LED strips and wiring.
Apparently I had some faulty LEDs.

[sblantipodi]

In my case, the problem was solved by replacing all LED strips and wiring.
Apparently I had some faulty LEDs.

I don't think that this can be the case since it works ok without HDR

[sblantipodi]

Ok I finally release my implementation of Screen Capture for Adalight devices and I don't have any problems with HDR.

Obviously I don't post the link to my implementation because it would not be correct to you guys, I love your community and your work here. If someone is interested in having a working HDR can try my implementation on my GitHub.

I still remain a big fan of prismatik and hope that this problem will be solved in the future.

PS: Zomfg, sorry I had no time to do that try, I will do it as soon as I can.

[Benik3]

Hello.
I'm also interested in HDR fix. I have now HDR 144Hz monitor. When switching to 10bit support or opening game with HDR I have this blinking.
I tried to play with the source codes. I successfully updated dxgi to use FLIP SWAP CHAIN. Then I tried to change DXGI_FORMAT to R16G16B16A16_FLOAT without success. With R10G10B10A2_UNORM I have no flickering, but I got weird colors on the LEDs :/
DXGI and C++ is absolutely new to me, so it's hard to try something :D

EDIT: Is interesting that it flash really only when actual FPS are lower then grab interval (or something like this)
EDIT2: Ok it's not only about FPS. But it happens always when you move with mouse, but what is interesting if you grab e.g. window and move with window, it works ok

P.S. You can simulate this behaviour on SDR monitor by setting const DXGI_FORMAT DesktopFormats[] = { DXGI_FORMAT_R10G10B10A2_UNORM }; under DDUplGrabber.cpp