Re: [oe-core][PATCHv6 0/5] Display manager proposal for x11 and wayland

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Wed May 21, 2025 at 1:39 AM CEST, rs wrote:
> From: Randolph Sapp <rs@ti.com>
>
> We've recently run into some issues with weston-init attempting to start Weston
> prior to all drm devices being registered. There's not really a good, scriptable
> mechanism to listen in to device registration events that works with the
> existing weston-init package. Well, at least one that doesn't involve polling
> files or introducing more dependency on the init system being used.
>
> I also see there is also a lot of scripting around starting X11,
> xserver-nodm-init, that (from my limited review) should experience the same
> issue.
>
> I'd like to introduce the following display manager for oe-core, emptty [1].
> This display manager is, as described upstream, a "Dead simple CLI Display
> Manager on TTY". It supports both x11 and wayland sessions, with togglable build
> parameters to completely remove x11 and pam dependencies. It's licensed MIT,
> which shouldn't be an issue for any users. (It is written in Go, if you have
> opinions about that.)
>
> With this, both weston-init and the xserver-nodm-init packages can be re-tuned
> to leverage this display manager and simply add a user and emptty config for an
> autologin session. This can resolve the current behavior across init systems
> without additional scripting, and move some development out of this layer.
>
> This lists myself as a maintainer of emptty as well as xserver-nodm-init and
> xuser-account since these are currently unassigned and I've reworked them
> significantly here.
>
> Sorry for the delay on this series. I found a few bugs in emptty that I wanted
> to address before submitting this officially.
>
> [1] https://github.com/tvrzna/emptty
>
> v2:
> 	- Address spelling issues in commit messages
> 	- Attempt to resolve some test related issues with weston
> 	- Add additional logs to X11 related tests
> v3:
> 	- Reset AUTOLOGIN_MAX_RETRY to the default value of 2. When running
> 	  under QEMU the first auth attempt almost always fails.
> v4:
> 	- Add a tmpfile entry for the x11 domain socket directory.
> 	- Remove some scripts associated with weston-init that were being
> 	  shipped with weston
> v5:
> 	- Move tmpfile data to individual files
> 	- Add explicit entries for these in the FILES variable
> v6:
> 	- Do not attempt to ship a tmpfiles.d entry in libx11
>

Hi Randolph,

Thanks for the version, but again a previously seen error. Sorry for
the bad news :(

RESULTS - xorg.XorgTest.test_xorg_running: FAILED (1.31s)
...
AssertionError: 1 != 0 : Xorg does not appear to be running   PID USER       VSZ STAT COMMAND

https://autobuilder.yoctoproject.org/valkyrie/#/builders/20/builds/1637
https://autobuilder.yoctoproject.org/valkyrie/#/builders/95/builds/1638
https://autobuilder.yoctoproject.org/valkyrie/#/builders/9/builds/1649

I will drop the patch on my side, but I will keep the a-full build
running, we might see some other failures in the coming hours:

https://autobuilder.yoctoproject.org/valkyrie/#/builders/29/builds/1630


-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com