How do I run Wayland outside of X?

[darxus at chaosreigns.com]

On 04/09, Bill Spitzak wrote:
> The best result I have had was by altering weston to chown root.root
> and to turn on the setuid bit, and then running from a pty I switch
> to with Ctrl+Alt+1. In this case it certainly takes over the screen
> and displays a hash of colors and lines that seem to be the same

As Scott said, sounds like a Nouveau bug.  Try running
"~/source/drm/tests/modetest/modetest -v" outside of X.  Hopefully that will
fail too, and you can report a bug to Nouveau similar to this one:
https://bugs.freedesktop.org/show_bug.cgi?id=34469
modetest should flip back and forth between a color test pattern and a
solid grey screen.

> colors as the X display. However nothing works and I cannot get out
> of it except by rebooting. Previous versions of wayland I could get
> out of by typing Ctrl+Alt+8 to get back to X, then Ctrl+Alt+1 to get
> the pty again, and then ^C, but now nothing works.

That could be just how badly Nouveau is failing.

> I think perhaps I need to turn off X but I'm not sure how you do
> that! If I don't have to turn off X, can I run it by just clearing
> $DISPLAY before running it?

Don't need to turn off X.


Also, I'd recommend getting wayland 0.85 to work before trying to fight
with master, which occasionally breaks, so it's not immediately obvious if
the problem is local or the stuff in the repo is just currently broken.

http://www.chaosreigns.com/wayland/buildscript/dl/wayland-build-0.85.sh
http://www.chaosreigns.com/wayland/buildscript/

I think I made some modifications to the version that builds master since
you downloaded it.  If people *really* want to use that I guess I could
modify my 0.85 build script to only check out the branches required for
0.85 instead of master depending on a variable.


On 04/09, Scott Moreau wrote:
>    You shouldn't have to stop X or change permissions on the weston binary.
>    It should be enough to run src/weston from the weston source directory
>    with escalated permissions, outside of X (in a tty).

Changing permissions as he did is necessary to run weston outside of X if
installed without SUID root, as he did.

>    I wouldn't worry much about this right now since you're using ubuntu and
>    ubuntu currently does not support systemd. (See�
>    [1]https://wiki.ubuntu.com/systemd for more information). Weston should
>    work fine in drm but it sounds like your graphics drivers are broken.

Heavily culled IRC conversation:

09:47 < pq> I think there's something not exactly right with the socket
            permissions, when weston is suid-root, but never looked into
            it - judging from user reports
10:27 < krh> devilhorns: what kind of errors do you get?
10:33 < devilhorns> krh, I get "failed to create display: Permission
                    denied"
11:15 < krh> devilhorns: what permissions do you have?
11:19 < devilhorns> krh, wrt perms: srwxr-xr-x root users for the wayland
                    socket
02:32 < pq> krh, maybe you have a different umask to everyone else who get
            permission denied on the socket of a suid-root weston?
07:26 < krh> pq: or maybe everybody else is running ubuntu which doesn't
             have systemd or a real $XDG_RUNTIME_DIR and the runtime
             dir has different permissions/sticky bits that /tmp
07:26 < krh> [krh at minato ~]$ echo $XDG_RUNTIME_DIR
07:26 < krh> /run/user/krh
07:48 < pq> krh, ah! Indeed, /tmp usually has permission bits that restrict
            files to the owner.
08:44 < krh> pq: I've suggested that people set it to /tmp if it's not set
09:06 < CIA-98> weston: benjaminfranzke wayland/weston:master *
                rbfeda130de34 / (13 files in 2
                dirs): Introduce weston-launch
                http://cgit.freedesktop.org/wayland/weston/commit/?id=bfeda130de340c090895d23ea0a5742521ff0078
12:09 < krh> pq: bnf weston-launcher should fix the socket permission problem

Actually it sounds like weston-launcher is needed to handle a permissions
problem in master.  If weston is SUID root, clients end up without
permission to connect to it.

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