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Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
980a294292
The WgpuRenderer defaults to VK_PRESENT_MODE_FIFO_KHR (vsync), which blocks vkQueuePresentKHR until the compositor releases a buffer via wl_surface.frame. On some Wayland compositor+driver combinations (notably NVIDIA proprietary + Hyprland, but also observed on KDE/GNOME + AMD RADV), these frame callbacks can be delayed or lost, stalling the entire calloop event loop for tens of seconds. VK_PRESENT_MODE_MAILBOX_KHR does not block on vblank: it replaces the pending frame in a single-entry queue. This avoids the stall entirely. The renderer already falls back to Fifo automatically if Mailbox is unsupported by the driver. The WgpuSurfaceConfig has had a preferred_present_mode field since #50815 (added for Android lifecycle transitions with the same rationale). This commit sets it to Mailbox in the Wayland window creation path only. X11 is not affected. Self-Review Checklist: - [x] I've reviewed my own diff for quality, security, and reliability - [x] Unsafe blocks (if any) have justifying comments - [x] The content is consistent with the [UI/UX checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist) - [x] Tests cover the new/changed behavior - [x] Performance impact has been considered and is acceptable Note on tests: This change is in the Wayland platform's window creation path (WaylandWindowState::new). The surface configuration is delegated to WgpuRenderer which already has test coverage for preferred_present_mode fallback logic. A full integration test would require a running Wayland compositor in CI. Verified manually and tested against the renderer's unwrap_or(Fifo) safety net by inspecting surface_caps.present_modes on both NVIDIA proprietary and Mesa RADV drivers. Closes: #50229 Closes: #55345 Closes: #39097 Closes: #50734 Refs: #38497, #52009, #52403, #50574, #49961, #47750, #46203, #50195, #50283, #42164, #39156, #39234, #35948, #32618 Release Notes: - Fixed UI freezes on Linux (Wayland) when on certain GPU/driver combinations --------- Co-authored-by: Neel <neel@zed.dev> |
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| .zed | ||
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| extensions | ||
| legal | ||
| nix | ||
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| .rules | ||
| AGENTS.md | ||
| Cargo.lock | ||
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| CLAUDE.md | ||
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| CODE_OF_CONDUCT.md | ||
| compose.yml | ||
| CONTRIBUTING.md | ||
| debug.plist | ||
| default.nix | ||
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| flake.lock | ||
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| GEMINI.md | ||
| LICENSE-AGPL | ||
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| livekit.yaml | ||
| lychee.toml | ||
| Procfile | ||
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| Procfile.web | ||
| README.md | ||
| renovate.json | ||
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Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking issue)
Developing Zed
Contributing
See CONTRIBUTING.md for ways you can contribute to Zed.
Also... we're hiring! Check out our jobs page for open roles.
Licensing
License information for third party dependencies must be correctly provided for CI to pass.
We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:
- Is it showing a
no license specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.