Originally filed against the GTK project: Making sure you're not a bot! This was quickly identified as an nVidia driver issue. As of gtk 4.16 the Vulkan rendering backend is used by default. GTK4 apps are consuming unexpected CPU cycles while idle in the background when using the Vulkan backend…

[image] amrits: HI @Tekstryder Below are the updates for each bug. 5236115 - We have root caused the issue and working on the fix. 5238502 - We are investigating it actively. Just wanted to check if you are still seeing Crashing issue on close of GTK4 apps. Hi @amrits et al, With580.8…

Thanks for checking that. These are two separate issues with similar causes: they’re supervisory threads for Vulkan features that are waking up periodically to check the status of various things. I don’t think I have permission to describe what they’re for beyond that, sorry. They’re operating as in…

[image] aplattner: I filed internal bug number 5236115 for the /proc/stat case and 5238502 for the futex one. I really appreciate this! I’ll provide feedback for each subsequent driver release. [image] aplattner: could result in lower performance in some cases [image] aplattner…

[image] aplattner: internal bug number 5236115 for the /proc/stat case and 5238502 for the futex one Quick strace after updating to the 570.153.02 Production Branch driver. Looks like the /proc/stat issue #5238502 may have been addressed? [pid 5391] futex(0x7a3318000f50, FUTEX_WAIT_BITSE…

[image] aplattner: I filed internal bug number 5236115 for the /proc/stat case and 5238502 for the futex one. Unfortunately both bugs are still presently active with the 575.57.08 New Feature Branch driver release. kernel 6.14.9 gnome-shell 48.2 (Wayland) mutter 48.3 (-Dxwayland=false -Dx…

HI @Tekstryder Below are the updates for each bug. 5236115 - We have root caused the issue and working on the fix. 5238502 - We are investigating it actively. Just wanted to check if you are still seeing Crashing issue on close of GTK4 apps.

Thanks so much for the update! This is awesome. [image] amrits: Crashing issue on close of GTK4 apps I tested the latest 575.57.08 driver with Vulkan enabled for only one day and had one crash-on-exit. But, there were very few app exits. I can always get another gdb backtrace if needed. I in…

Currently testing the 575.64 New Feature Branch driver release. Had a crash-on-exit with the very first instance of the first GTK4 app I tested for these issues. The backtrace is lacking so many symbols it can’t be of much help. See the slightly better one I included previously here . As for the tw…

No change with the new 575.64.03 New Feature Branch driver release. Given the changelog , this is not a surprise. Minor bug fixes and improvements Getting a bit nervous since the announcement stating 580 series driver will be the last version supporting my GPU. [image] Tekstryder: 523850…

[image] amrits: Just wanted to check if you are still seeing Crashing issue on close of GTK4 apps. I sure am. Just switched to sway yesterday and figured I’d go all in on Vulkan (WLR_RENDERER=vulkan) to see how things go for a while. tl:dr not so well. Three GTK4 apps crashed each on exit …

Hi @aplattner @amrits @ahuillet , thanks for your attention paid thus far to these issues. I’ve been testing running the Vulkan backend over a longer duration (1 week) now. Crash-on-exit has become the priority issue here. Could that please be assigned an internal tracking #? I find that when se…

[560.35.03] GTK4 apps background CPU usage with Vulkan renderer

Graphics / Linux Linux

Tekstryder August 4, 2025, 9:08pm 37

I almost fell out of my chair when I saw this in the 580.65.06 Beta release notes:

I'm back on the default Vulkan backend, and I'll give it 7-10 days of testing 580 Beta before confirming fixed.

Exciting times indeed!

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[560.35.03] GTK4 apps background CPU usage with Vulkan renderer

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