Re: [arch-general] Wayland Support in Gnome 3.10

On 09/25/2013 10:02 PM, Armin K. wrote:

On 09/25/2013 09:13 PM, Jan Alexander Steffens wrote:

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On Wed, Sep 25, 2013 at 6:08 PM, kristof wrote:

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I'm not entirely savvy with all the details but from my understanding, GNOME 3.10 will be featuring a Wayland tech preview, meaning that it can (optionally?) use the wayland protocol to manage graphics and windows and all that fun stuff.

Are we going to compile this support by default? Does anyone know how and if we'll be able to switch back and forth between Xorg and Wayland?

It's all just ad-hoc in 3.10. For example, GDM has no support for Wayland.

What you're supposed to do is log in on a VT (in text mode) and then run "gnome-session --session=gnome-wayland" to start the GNOME Shell. Alternatively, run "gnome-shell --wayland" from X to get a nested shell.

However, at least for me it doesn't work at the moment: The shell launched from text mode just aborts with a trap, and the nested shell errors with: (gnome-shell-wayland:12690): Clutter-CRITICAL **: Unable to initialize Clutter: Failed to connected to any renderer due to constraints

I'm a bit puzzled about how to fix this. I have Intel Sandy Bridge graphics, and the needed features of cogl and clutter are enabled. Insight welcome.

I've already tried adding XWayland (xorg-server from xwayland branch with --enable-wayland, as well as xf86-video-wayland), but that didn't change anything. It's likely XWayland is needed anyway, but it seems my current problem is another one.

You can use "mutter-launch -- gnome-shell-wayland --wayland" from a VT. The clutter error seems to be there because cogl wasn't built with x11 egl platform, but you shouldn't be getting that anyways. It's a bit ugly when starting it this way (ie, nearly impossible to shut it down - keybindings don't work, no vt switch), but it seems to start.

Also, xwayland is required for gnome-shell-wayland to fire up.

Update, gnome-session --session=gnome-wayland works only as root when started from VT (for me). For some reason, xwayland dies when ran as normal user and gnome-shell-wayland traps.