Disable or Detect DSC?

[KarmaCase]

Anyone know if there is a way to disable DSC on your monitor or at least detect whether it's enabled or not? I've been having some strange issues that I think are related to DSC, but I can't even troubleshoot it because I can't be sure whether it's even enabled or not or how to disable it. Any help is greatly appreciated.

[RealNC]

Anyone know if there is a way to disable DSC on your monitor or at least detect whether it's enabled or not? I've been having some strange issues that I think are related to DSC, but I can't even troubleshoot it because I can't be sure whether it's even enabled or not or how to disable it. Any help is greatly appreciated.

Does the monitor allow you to choose the DisplayPort version? If you set it to 1.2, DSC should be disabled and you won't be able to select the maximum refresh rate at the highest possible resolution anymore.

What GPU are you using? If it's Nvidia, you can tell that DSC is used if you can't use DLDSR or NIS.

[hart]

to disable DSC, the monitor must support the option

to know if is enabled or know, you just look at the connection you are using and the bandwidth you are requiring from the gpu

DP 1.4? 240hz 8bit, 10 bit will use DSC

hdmi 2.1, 315hz on 10 bit, more will use DSC

What GPU are you using? If it's Nvidia, you can tell that DSC is used if you can't use DLDSR or NIS.

not always true, for example the PG27AQDM let the user use DLDSR with DSC enabled at 240 10bit while other monitors with the same panel can't do it.

[Kyouki]

What GPU are you using? If it's Nvidia, you can tell that DSC is used if you can't use DLDSR or NIS.

Unless you select DLDSR from the desktop and then start the game to still have all of the goodies like Gsync which also refuses to work by then.
[At least I think that was DSC related...]

[RatchetStrap]

I've been trying to find a way for a while now too. My monitor allows you to disable DSC for DP, but not for HDMI. Well, the HDMI port is full bandwidth 2.1, 48Gpbs. Which should support my 1440P 240Hz monitor without DSC. I assume it's off, but if it's not, I may as well use DP.
Thankfully my panel supports GSync over HDMI and DP so everything works even if DSC is active.

The DLDSR trick doesn't work all the time. https://tftcentral.co.uk/news/nvidia-ds ... -sometimes
I can use DLDSR when DSC is active with my combo. A 4070FE with a LG 27GR83Q-B, at 1440P 240Hz and 10bit color with HDR active, no issues.

To troubleshoot your issue, try 60Hz. DSC should be negotiated in the handshake only when necessary.

[1mongus]

For some reason my monitor (FO32U2P) doesn't disable DSC no matter what, even at 1920x1080 60hz. Anybody got any idea how to solve this?

[RealNC]

For some reason my monitor (FO32U2P) doesn't disable DSC no matter what, even at 1920x1080 60hz. Anybody got any idea how to solve this?

On Nvidia, if the display supports DSC, it will be used regardless of whether it's needed or not. I don't know about AMD.

[1mongus]

For some reason my monitor (FO32U2P) doesn't disable DSC no matter what, even at 1920x1080 60hz. Anybody got any idea how to solve this?

On Nvidia, if the display supports DSC, it will be used regardless of whether it's needed or not. I don't know about AMD.

So it's just impossible to use DSR in my case?

[RealNC]

So it's just impossible to use DSR in my case?

I don't know. DSR works with DSC on my display (1440p 240Hz) because only one internal head is used. I don't know if there's a way to make it use only one head on your display. 4K is too high for one head and it needs two. Maybe if you delete the 4K 240Hz mode in CRU and only leave 144Hz or 120Hz, I don't know.