Closing windows causes VRAM memory leak

[GallowsDove]

When you open a new "kitty" window, nothing special happens (as you would expect), however when you close the window VRAM usage increases by varying amount, depending on the size of the window.

I've noticed this issue when looking at another issue with increasing VRAM caused by NVIDIA.

The issue is however unrelated, I've been able to test both NVIIDA RTX 3070 and AMD RX 9070 XT and both leak VRAM.

Tested with (positively):

• Niri
• Cosmic

Tested and not impacted:

• River
• Hyprland
• Sway

[GallowsDove]

possibly related issue: hyprwm/Hyprland#357

[TheCodedProf]

Can confirm the same issue with an AMD card on Niri (have not tested elsewhere atm, but will try to do so when I'm home).

[GallowsDove]

Edit: Does not seem to happen in anvil, but still find it weird that it happens both in cosmic and niri. Should I just report it to the respective compositors?

[vfosterm]

I think this is a general issue with the NVIDIA drivers when explicit sync is enabled. I'm using Hyprland and it definitely repros there when enabling explicit sync.

Limiting the free buffer pool for the compositor on the nvidia side is a functioning workaround for me. Haven't noticed any side effects and I'm able to use explicit sync again.

Details here:
NVIDIA/egl-wayland#126 (comment)

[GallowsDove]

I think this is a general issue with the NVIDIA drivers when explicit sync is enabled. I'm using Hyprland and it definitely repros there when enabling explicit sync.

Limiting the free buffer pool for the compositor on the nvidia side is a functioning workaround for me. Haven't noticed any side effects and I'm able to use explicit sync again.

Details here:
NVIDIA/egl-wayland#126 (comment)

Like I said, that is probably a completly unrelated issue. Yes, NVIDIA as such has issues, however the VRAM leak happens for me even with the workaround active. And it was also reproduced on AMD gpu.

And like I said, I didn't notice the issue on hyprland.

when explicit sync is enabled

is there a way to reproduce it on hyprland? does something specific have to be set? because hyprland didn't have the leak when I tested it (with the workaround active), and both Niri and Cosmic do.

[xcccdjsn]

Also wezterm can cause memory leaking. Maybe other application I has not tested occurs same result.. I used wezterm, kitty and many screen lockers in dwl that does not cause memory leaking. In dwl, it will release the related memory usage qucikly after closing application in using.

[GallowsDove]

It also doesn't happen only with terminals, but also noticed the effect on e.g. Occulante, image viewer, or with Thunar