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bug#57589: Guix hands on GDM with wayland


From: Grigory Shepelev
Subject: bug#57589: Guix hands on GDM with wayland
Date: Tue, 6 Sep 2022 14:05:50 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.12.0

Creating new user didn't helped.

I created new user (did this Guix way, via adding to config and reconfiguring the system) and logged it as a new user. Still X11 system displays with `xrandr`, and `echo $XDG_SESSION_TYPE`. I don't think there is a need to try moving all home files, creating new user should be enough to test provided option.

Although I noticed a gear icon below in the right of the gdm screen when logging in as a default user (saw that in Ubuntu) with options "GNOME" or "GNOME on Xorg". Trying to login in "GNOME" (Wayland supposedly) gives a black screen for ~2s.  After couple attempts logged back into "GNOME on Xorg".

Attached logs again. They says something about DBUS. Any ideas?

---

(gsd-keyboard:5189): dbind-WARNING **: 13:35:36.273: AT-SPI: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files (gsd-xsettings:5219): dbind-WARNING **: 13:35:36.476: AT-SPI: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
GNOME Shell-Message: 13:35:36.777: Registering session with GDM
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported maximum keycode 708, clipping.
>                   X11 cannot support keycodes above 255.
Errors from xkbcomp are not fatal to the X server
(gnome-shell:5099): mutter-WARNING **: 13:36:02.454: Connection to xwayland lost
---

On 05.09.2022 20:55, Grigory Shepelev wrote:
Had some info from Guix Matrix channel:
> GDM does wayland too with the option set to #t. I was able to get it to work going back from sddm, but I had to remove the home folder and recreate it from scratch, since gnome session was crashing on login. I had no problem starting gnome on a new account so i figured something was hanging around that cause a problem even after deleting all caches and configs etc.
> By “home folder” I mean my user’s directory /home/use

https://matrix.to/#/!jivGmMiiorFwdgwaxc:matrix.org/$W4HJQCzv8G0aHM3_PAFrtUaj6Q3aS18vMZCwlMch71I?via=matrix.org&via=hummingbard.com&via=privacytools.io <https://matrix.to/#/!jivGmMiiorFwdgwaxc:matrix.org/$W4HJQCzv8G0aHM3_PAFrtUaj6Q3aS18vMZCwlMch71I?via=matrix.org&via=hummingbard.com&via=privacytools.io>

Most likely will try for new user tomorrow

пн, 5 сент. 2022 г., 16:24 Grigory Shepelev <shegeley@gmail.com>:

   Oops. I accidentally replied privately to dev@jpoiret.xyz, not
   mentioning 57589@debbugs.gnu.org. I hope the history can be recovered
   from this message.

   Josselin recommended to

   - check permissions on /tmp/.X11-unix/ (gdm user should have r+w
   permissions)

         shegeley@zone51 /tmp$ ls -lah .X11-unix/
         total 0
         drwxrwxrwt 2 gdm      gdm    80 сен  5 16:12 ./
         drwxrwxrwt 6 root     root  160 сен  5 16:16 ../
         srwxrwxrwx 1 shegeley users   0 сен  5 16:12 X1
         srwxr-xr-x 1 gdm      gdm     0 сен  5 16:12 X1024

   -  check /var/lib/gdm/, doesn't have the proper permissions

        Hm. That's really strange. For some reason /var/lib/gdm had
        "transmission" as user-group. I assure you that I didn't explicitly
        do any "dirty stuff" like that permission changing in my config


        shegeley@zone51 /tmp$ sudo ls -lah /var/lib/gdm
        total 0
        drwx------ 1 gdm  gdm           38 авг 26 21:46 .
        drwxr-xr-x 1 root root         248 авг 28 18:37 ..
        drwxr-xr-x 1  973 transmission  62 авг 26 21:46 .cache
        drwx------ 1  973 transmission  44 авг 26 21:46 .config
        drwx------ 1  973 transmission  10 авг 26 21:46 .local
        shegeley@zone51 /tmp$ sudo chown -R gdm:gdm /var/lib/gdm
        shegeley@zone51 /tmp$ sudo ls -lah /var/lib/gdm
        total 0
        drwx------ 1 gdm  gdm   38 авг 26 21:46 .
        drwxr-xr-x 1 root root 248 авг 28 18:37 ..
        drwxr-xr-x 1 gdm  gdm   62 авг 26 21:46 .cache
        drwx------ 1 gdm  gdm   44 авг 26 21:46 .config
        drwx------ 1 gdm  gdm   10 авг 26 21:46 .local


   After changing it was able to launch into GDM, but with X11 as display
   manager :( Attached new logs.


   On 05.09.2022 10:23, Josselin Poiret wrote:
    > Hi again,
    >
    > Grigory Shepelev<shegeley@gmail.com> writes:
    >
    >> My config is heavily depends on it's directory (passing it with
    >> --load-path). I can (and will) publish it all (I've been
   planning to do
    >> so) but I'd like to polish few parts.
    >>
    >> Any exact part are you looking for in config?  I attached my
   system-wide
    >> services.
    > I asked for that partly because it helps identifying common
   errors, and
    > it's always better for people debugging to have access to all the
    > information, and partly because I couldn't see anything that
   could help
    > in the logs.  However, it seems mutter can't write into
   /tmp/.X11-unix/,
    > could you check that the gdm user has the permission to write
   there?  It
    > should be rwxrwxrwx.  I don't see any modification in your config
   that
    > would prevent the x11-socket-directory-service from
   %desktop-services to
    > run.  Also, it seems that /var/lib/gdm/ doesn't have the proper
    > permissions, maybe because of [1].  You can try `sudo chown -R
   gdm:gdm
    > /var/lib/gdm` to fix that.
    >
    > [1]https://issues.guix.gnu.org/36508
    >
    > HTH.

Attachment: greeter-13:26-06-09-2022.log
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