I have this issue with my 144hz LG-C4 43” screen where it will blank out the screen and even crash the display when I try and use VRR in 144hz mode under Linux.
I’ve tried several things like manual EDID usage and a few kernel arguments but no luck. The issue is that this problem started with a new LG OLED update, however the problem didn’t persist for WINDOWS11.
So this screen has no issue with this mode under Windows11, but for some reason under Linux it does, which leads me to believe there could be a driver issue going on?!
Anyone else had 144hz VRR issues at 4k? (don’t think HDR has a effect on it).
I thought this might be a very rare issue but I’m seeing LOADS of people with similar issues related to high hz rates and VRR under Linux(but not windows), loss of signal type of glitching etc… even with LG and HDMI2.1
Looks like NVIDIA’s drivers are just getting WORSE with this kind of support sadly.
Would just like to point out with HDR disabled, VRR at 144hz still does not work under LINUX.
That is REDUCED bandwidth with that disabled, so we have a NVIDIA driver bug here for sure as its not even a issue under Windows11! (linux exclusive issue)
Could be a compatibility issue with LG C# line of monitors with 144hz mode.
UPDATE: Managed to get YCbCr 4:4:4 mode going in the LG C4 settings (needed to create a xorg file even thought I use Wayland)
UNFORTUNATELY YCbCr 4:4:4 mode still is broken under Linux for 144hz with VRR enabled.
Considering downgrading to v570 or v575 driver to see if it was specific driver update that had the issue. It could also be a NEW issue with NVIDIA and latest Wayland Plasma updates.
I’m experiencing the exact same issue on my system.
System details:
OS:Arch Linux
Kernel:linux-zen 6.18.3
Driver:nvidia-open-dkms 590.48.01
Desktop Environment:KDE Plasma 6.5.4 (Wayland)
Monitor:LG C5 @ 3840x2160 with HDR and VRR
GPU: Nvidia RTX 4090
Behavior:
At 144 Hz, the screen repeatedly goes black unless I continuously move the mouse in a fullscreen application.
At 120 Hz, everything works perfectly:
VRR enables seamlessly in auto mode.
No flicker or black screen during initialization.
At 144 Hz with VRR “Always”, the screen goes black consistently unless there is constant mouse movement.
@primetechau How’d you manage to get 4:4:4 working? Looking into it now.
I also read that:
HDMI 2.1 is not supported by the open source driver due to HDMI forum stonewalling - Therefore the bandwidth doesn’t exist to achieve what you want to achieve.
So could still be a bandwidth issue, and I think they were talking about the AMD mesa driver so may be unrelated.
+1, I have this same issue. I’m running CachyOS with kernel 6.18.5, using linux-cachyos-nvidia-open and NVIDIA driver version 590.48.01. I have an RTX 5090, and a 65” LG C4 TV. I’m using KDE Plasma 6.5.4.
I’m able to reproduce the issue exactly as described by @mbwilding.
@mbwang btw, the HDMI 2.1 limits should only apply to AMD users, since the HDMI Forum was (frustratingly) disallowing AMD from including that in their open-source driver. It’s all a bit of a mess. However, it’s not something that should impact NVIDIA users running NVIDIA’s official drivers.
Linux 580.95.05 open-kernel drivers on HDMI 2.1 - VRR results in chroma subsampling at 4k@120hz and visual crash of the display at 4k@144hz. Without VRR works fine at 4k@144hz HDR
Same behavior on the beta 590 drivers
Same setup works perfectly fine on windows with the exact same hardware 4k@144hz VRR and HDR
Nvidia driver 590.48.01, Bazzite 43.20260217 - kernel 6.17.7-ba25.fc43.x86_64, EVGA FTW 3090 connected to a LG C5
Having the exact same issues as this thread. 120hz + VRR mostly works, I get some light flickering that isn’t noticeable in games, only on the desktop. As soon as I enable vrr when in 144hz everything goes black. Tested in Windows, works perfectly with g-sync indicator. HDR toggle makes no difference for either refresh rate.
Nvidia driver 590.48.01, Bazzite 43.20260217 - kernel 6.17.7-ba25.fc43.x86_64, EVGA FTW 3090 connected to a LG C5
Having the exact same issues as this thread. 120hz + VRR mostly works, I get some light flickering that isn’t noticeable in games, only on the desktop. As soon as I enable vrr when in 144hz everything goes black. Tested in Windows, works perfectly with g-sync indicator. HDR toggle makes no difference for either refresh rate.
I just tried this on the NVIDIA 595 beta driver not expecting any improvements, but it appears to be fixed, much to my surprise and pleasure! For the first time in months, I’m once again able to drive my LG C4 at 4K 144 Hz HDR with VRR.