Request the X11 EGL platform in iokitd

iokitd passed an Xlib Display to eglGetDisplay(), so Mesa chose the
platform from EGL_PLATFORM. Wayland sessions often set it to "wayland",
and the first darling command passes its environment to every guest
service; Mesa then treated the Display as a wl_display, iokitd crashed
in pthread_mutex_lock and launchd restarted it every 10 seconds. Use
eglGetPlatformDisplay(EGL_PLATFORM_X11_KHR, ...) as OpenGL already does.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/TROUBLESHOOTING.md

@@ -62,6 +62,10 @@ LaunchServices dereferenced a nullable error-output pointer in six paths. The pa
 
 LaunchServices now opens `http`, `https` and `mailto` links on the Linux desktop itself. It loads the host's `libsystemd.so.0` and asks `xdg-desktop-portal` (`org.freedesktop.portal.OpenURI`) on the user session bus to open the link, so your default browser starts outside Darling and survives `darling shutdown`. Without a portal, it starts `xdg-open` in a transient systemd user unit instead. It also reports a handler for these schemes, since Electron checks for one before opening a link. Other schemes, control characters and URLs over 4096 bytes are rejected. If a link still does nothing, check the client's stderr for a `LaunchServices:` line and that `busctl --user status org.freedesktop.portal.Desktop` works on the host. Both LaunchServices and AppKit must be rebuilt; the old `/private/tmp/rclol-open` spool and `tools/riot-open-url-bridge.py` are obsolete. The hand-off passed the host-side D-Bus regression and opened the host browser from a guest through both `open(1)` and `NSWorkspace`; a link clicked in the Riot client is not yet confirmed. The null-pointer fix does not explain every unrelated button crash.
 
+## `LOLSIGFAIL … addr=0x143` every 10 seconds
+
+`iokitd` crashed in host glibc's `pthread_mutex_lock` and launchd restarted it every 10 seconds. It called `eglGetDisplay()` with an Xlib display, so Mesa picked the platform from `EGL_PLATFORM`. Wayland sessions often set that to `wayland`, and the first `darling` command passes its environment to every guest service, including `iokitd`. `scripts/run.sh` sets `EGL_PLATFORM=x11` and was unaffected, but `darling shell` from a Wayland terminal (including the one in `scripts/install-runtime.sh`) started the loop. `iokitd` now requests the X11 platform explicitly. The fix is part of the base install (`sudo cmake --install`); until then, start Darling with `EGL_PLATFORM=x11`.
+
 ## Blocky video or flickering startup logo
 
 The first dynamically resolved GL call could lose floating-point arguments during ELF symbol lookup. Chromium's linear sampler request then failed and left nearest sampling. The generated resolver now preserves those registers. Install both the rebuilt native `libGL.dylib` in `RuntimeLibraries` and the OpenGL framework's library copy using the paired runtime installer; the framework alone is insufficient.