High CPU usage (80–90%) in all Firefox-based applications on Wayland #11881
Replies: 6 comments 8 replies
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Too old Hyprland |
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Wait, i enabled |
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yeah check WAYLAND_DEBUG=1 firefox, and just move the mouse out of the window. there is some looparoo going around here |
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running
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Updated to the stable version:
still it persists. |
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that particular spam should be fixed in 0.51.1 |
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Wdymb "Hyprland is old"? Mine is like 2+ months old and it's like 30-80 max when im working with my rice! Even with firefox it doesnt spike! |
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to just post an update i know whats happening, i just havent worked out a proper fix without breaking something else. currently the buffer damage isnt reset upon commit. and firefox calls ::frame to get us a framecallback, commits to apply it. that commit itself uses the old buffer damage and it just continously redraws itself, causing lots of cpu and gpu usage. |
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#11896 should pretty much solve it, or atleast make it 90% better. |
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solution: use lfs 12.3's firefox from blfs or use an old arch pkg ver of firefox. use firefox 141 My usage vith a bare firefox vindov vith: a m3 userchrome.css theme, uBlock Origin, and pyvalfox sorry for the double u key it's a 24$ mechanical kbd yeah tech prices suck in turkey :( edit: it is like at 5% vhile searching v duckduckgo |
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I'm on hyprland-git, I have updated today and noticed my desktop become unresponsive. I can reproduce it by using YouTube and seeing the CPU usage climb up from 8% to 90% in ~30 minutes. |
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yeah i missed clearing callbacks on a .reset() funnily enough was mostly only triggered on firefox or very long sessions of other apps in combination of spammy wl_surface::frame, its reverted, and #11953 fixed. |
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Running it right now and after a quick test I'm pretty sure it fixed the issue, CPU usage stays at 7%. Will report back if I encounter any issues. |
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Description:
On Hyprland, all Firefox-based applications (Firefox, Thunderbird, Librewolf, Zen, Mullvad Browser, Tor Browser, etc.) consistently use abnormally high CPU (80–90%).
This issue only occurs on Wayland in Hyprland.
Steps to reproduce:
Expected behavior:
Firefox-based applications should behave normally (low idle CPU usage) as they do on GNOME Wayland or under XWayland.
Actual behavior:
On Hyprland Wayland, CPU usage spikes to ~80–90% in all Firefox-based applications.
System info:
Hyprland version:
Hyprland 0.51.1 built from branch at commit 71a1216abcc7031776630a6d88f105605c4dc1c9 ([gha] Nix: update inputs). Date: Mon Sep 22 20:54:03 2025 Tag: v0.51.1, commits: 6436 built against: aquamarine 0.9.4 hyprlang 0.6.3 hyprutils 0.8.4 hyprcursor 0.1.13 hyprgraphics 0.1.6Kernel version: 6.16.8-zen3-1-zen
Distribution: Arch Linux
Firefox version: Mozilla Firefox 143.0.1
Additional context:
Tried multiple kernels and both hyprland and hyprland-git.
Tried toggling all relevant Firefox Wayland flags.
Problem persists across all Firefox-based applications.
No other performance issues observed in Hyprland.
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