Display modes above 2560x1440p@120hz with HDR enabled cause flickering/corruption within gamescope-session

Graphics / Linux Linux
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Since the release of 555.42.02, I have been thoroughly testing gamescope compatibility with the nvidia-drm driver and have had a few difficulties. The main issue I’m experiencing has to do with HDR colorspace specifically within embedded gamescope or “gamescope-session”, which is responsible for providing a “Steam Deck” like desktop session for gaming.

As a preliminary point of reference, all of this has been done on gamescope versions past this PR which fixes gamescope-session on nvidia-drm: Disable use of IN_FENCE_FD if it fails by cubanismo · Pull Request #1330 · ValveSoftware/gamescope · GitHub

If I enable HDR within this session and the resolution is anything above 2560x1440p@120hz, I experience severe display corruption as recorded in my clips section below and on this GitHub issue: [NVIDIA] 555 Driver Status · Issue #1320 · ValveSoftware/gamescope · GitHub

It should also be noted that this happens:
On Arch Linux + Fedora
Across both the NVIDIA .run driver installs and packaged versions of the driver for both Arch and Fedora

If I use nested gamescope on my Plasma 6 desktop, HDR works very well with no issues all the way up to higher resolutions of my displays, 3440px1440p@144hz via DisplayPort (175hz seems broken on 555 with my specific monitor but that’s a separate issue) and 3840x2160p@120hz via HDMI 2.1, but trying to achieve the same in embedded gamescope (via TTY) or dedicated gamescope-session has been impossible for me.

Is anyone else experiencing similar issues? This is a very hyperspecific issue topic so I’m not sure how many people have been regularly testing gamescope/gamescope-session on nvidia.

Related media:

nvidia-bug-report.log.gz (747.7 KB)

4 Likes
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This issue is still present as of 560.35.03 with both the open and proprietary modules across 3 monitors (only one connected at a time) and both DisplayPort and HDMI 2.0 + 2.1.

image
image1920×1050 243 KB

the issue on a separate monitor, a G95NC, at 7680x2160p@120hz w/ HDR enabled

1 Like
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Yup, can confirm the same issue happens here when starting gamescope on the Nvidia GPU in my laptop.

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I’m seeing this on 565.77, single monitor (LG C2).

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fwiw this is also being tracked as a gamescope issue after someone reported it separately here: [Nvidia] Black screen when HDR option is enabled · Issue #1593 · ValveSoftware/gamescope · GitHub

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this bug still occurs on a new card (5090), new cable (DisplayPort 2.1), and a new monitor (LG 5K2K 45" OLED Gaming Monitor - 45GX950A-B | LG USA). If you toggle HDR within gamescope-session on a NVIDIA gpu, it corrupts your entire display with flickering artifacts:

nvidia-bug-report.log.gz (622.6 KB)

WARNING: FLASHING LIGHTS

That clip was recorded at my monitor’s native resolution of 5120x2160p after toggling HDR from off to on.

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Hi @matt-schwartz
I have filed a bug 5240452 internally for tracking purpose.