wehub-resource-sync
46 lines
2.0 KiB
Go
46 lines
2.0 KiB
Go
package main
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import "os"
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// init applies the NVIDIA/Wayland WebKit workaround before the Wails runtime
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// initializes WebKitGTK. On KDE Plasma Wayland with NVIDIA GPUs the webview
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// crashes due to an upstream WebKit explicit-sync bug (WebKit bugs #280210 and
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// #317089). The underlying interaction is between WebKit's ANGLE library and
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// NVIDIA's egl-wayland: ANGLE advertises explicit-sync (wp_linux_drm_syncobj)
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// but fails to set an acquire point before committing the buffer, which violates
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// the Wayland protocol and causes the compositor to disconnect the client.
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//
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// Setting __NV_DISABLE_EXPLICIT_SYNC=1 is the official NVIDIA EGL API to
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// disable the explicit-sync protocol path. It preserves GPU acceleration
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// (unlike WEBKIT_DISABLE_DMABUF_RENDERER=1 which disables DMA-BUF entirely
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// and severely degrades performance) and keeps the native Wayland session
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// (unlike GDK_BACKEND=x11 which falls back to XWayland).
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//
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// The fix only applies when all three conditions are true:
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// 1. Wayland session (WAYLAND_DISPLAY set or XDG_SESSION_TYPE=wayland)
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// 2. NVIDIA GPU present (/sys/module/nvidia exists)
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// 3. User has not already explicitly set __NV_DISABLE_EXPLICIT_SYNC
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func init() {
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// Only apply under Wayland — the explicit-sync bug is Wayland-specific.
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if os.Getenv("WAYLAND_DISPLAY") == "" && os.Getenv("XDG_SESSION_TYPE") != "wayland" {
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return
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}
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// Only apply when an NVIDIA GPU is present — the env var is NVIDIA-specific.
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if !hasNVIDIAGPU() {
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return
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}
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// Respect an explicit user choice so the workaround can be opted out of.
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if _, ok := os.LookupEnv("__NV_DISABLE_EXPLICIT_SYNC"); ok {
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return
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}
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os.Setenv("__NV_DISABLE_EXPLICIT_SYNC", "1")
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}
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// hasNVIDIAGPU checks whether the NVIDIA kernel module is loaded by looking for
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// /sys/module/nvidia. This is the most reliable detection method that works
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// across all Linux distributions and doesn't require external tools.
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func hasNVIDIAGPU() bool {
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_, err := os.Stat("/sys/module/nvidia")
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return err == nil
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}
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