[Bug 246220] graphics/wayland: wayland-egl: could not open /dev/dri/renderD

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246220

            Bug ID: 246220
           Summary: graphics/wayland: wayland-egl: could not open
                    /dev/dri/renderD
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: x11 at FreeBSD.org
          Reporter: lantw44 at gmail.com
          Assignee: x11 at FreeBSD.org
             Flags: maintainer-feedback?(x11 at FreeBSD.org)

I don't know where the bug came from. If I chose the wrong port, please move it
to the correct one.

I was trying to run mutter as a nested Wayland compositor under Xorg, and I
found Xwayland just showed an error and hung. It could not show any X11 window.

wayland-egl: could not open /dev/dri/renderD (No such file or directory)

There is no /dev/dri/renderD on the system, and I don't know why it wants the
file. Running eglinfo also shows the same error:

libEGL warning: wayland-egl: could not open /dev/dri/renderD (No such file or
directory)

It seems to be a problem of the Wayland compositor, except that it isn't
limited to a single Wayland compositor implementation. Both mutter and sway
have the same issue. Sometimes they even report errors with weird names such as
/dev/dri/renderDvblank_mode and /dev/dri/renderDbo_reuse.

If I create the symlink /dev/dri/renderD -> renderD128, Xwayland can work
properly.

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