Flickering/screen corruption on a dual GPU laptop on Nvidia screen

[dragonnn]

Hi! I am trying Niri on my ASUS Zephyrus G14 GA401IU with has two GPUs: 04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Renoir [Radeon Vega Series / Radeon Vega Mobile Series] (rev c6) 01:00.0 VGA compatible controller: NVIDIA Corporation TU116M [GeForce GTX 1660 Ti Mobile] (rev a1) Where on of the laptop screen outputs is wired to the NVIDIA card (the USB-C port). It works on Niri but I get heavy flickering/screen corruption if anything happens on that screen (it doesn't happen only in vscode but in anything else too). [

https://github.com/YaLTeR/niri/assets/1771469/5efb94cc-c54e-46b2-9388-1a2d5d14ce90

](url) on stable

https://github.com/YaLTeR/niri/assets/1771469/ac0c2410-2734-4f89-842e-5137abc30b01

on git version that screen works fine on Hyprland without any flickering. Anything can be done about that?

System Information

• niri version:
• niri 0.1.6 (v0.1.6-57-gebaf1b0)
• and stable version 0.1.6 release from Arch repo

• Distro: Arch

• GPU: AMD Vega Mobile and GeForce GTX 1660 Ti Mobile

• CPU: AMD Ryzen 7 4800HS with Radeon Graphics

[YaLTeR]

Hey, I'm guessing that's just NVIDIA being NVIDIA. Let's wait for explicit sync in Smithay and niri and then see if it still happens.

[jeLee6gi]

I'm on a desktop with a 4070 and 555.52.04 drivers and I see the same flickering

@dragonnn did you try turning on wait-for-frame-completion-before-queueing? It fixes the flickering for me for now

[dragonnn]

Hey, I'm guessing that's just NVIDIA being NVIDIA. Let's wait for explicit sync in Smithay and niri and then see if it still happens.

True, true but somehow Hyprland manages it so I hopped for maybe some workaround :D. @jeLee6gi not yet, thanks I will try it. I see they is a debug section with options I can play around, didn't find it before.

[dragonnn]

Setting wait-for-frame-completion-before-queueing does look like it works now fine! So I can try move my system to niri. Thanks!

[YaLTeR]

Huh, okay, interesting.

[YaLTeR]

I'll mention this on the getting started wiki page.