On 8/29/19 8:40 AM, Pierre Labastie via blfs-dev wrote:
Hi,
With the shortly coming release, I think it is time I give some information
about my findings relative to the setting of the keyboard layout for gdm. Note
that I have not come to a definitive answer, far from it!
The main conclusion is that gdm uses gnome-shell, and that gnome-shell uses
systemd-localed for getting the keymap when it detects it is on a login
screen... So there are two approaches:
- add systemd- localed to the system. DJ has provided a patch, but I have been
unable to use it: or at least localectl does not launch systemd-localed, and
if I launch it manually before calling localectl, I get either "Function not
Implemented (for the set-keymap functions) or n/a for both vc-keymap and
x11-keymap... Note that systemd-localed runs for a short while, then exits...
But I think it would be the cleanest approach if we could make it work!
- tweak gnome-shell so that it uses the gsettings database (Bruce has provided
a sed for that, which works). But this leads to another problem, how to change
user settings for the "gdm" user. I have a workaround, which works to a
certain degree, but is not satisfactory, since it does not change the
screen-keyboard layout: copy the user dconf database to gdm user's home. I
still have to try Christopher's suggestions to override gsettings. It it works
it is cleaner I think. Now, I have a system where both keyboard layout and
screen-keyboard are azerty, but I am unable to know what put it in this state
(tried too many things). So there is a third solution, but I do not know what!
It certainly does not use either the gsettings override nor the user db... It
might be the following that I have tried (inspired by
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/desktop_migration_and_administration_guide/customizing-login-screen)
I created /etc/dconf/profile/gdm with:
user-db:user
system-db:gdm
file-db:/usr/share/gdm/greeter-dconf-defaults
Then I created a small gdm database in /etc/dconf/db/gdm.d/01-keyboard
[org/gnome/desktop/input-sources]
sources=[('xkb','fr)]
Then I run dconf update... At first, it did nothing, but I was still using a
non-sed'ed gnome-shell. Then, when I changed to a sed'ed one, I got the French
layout...
Something to try, but the gsettings override might be easier, if it works.
I hope you are staying interested in this, but for the book, I don't
think it is relevant. The intricacies of the interaction between gnome
and systemd are what's wrong with the design of systemd and gnome.
From the book's perspective I think we need to either remove gdm from
the System V book or put in a big caveat that gdm does not work with
non-us keyboards in the System V environment and to use another display
manager or the command line to initiate gnome.
-- Bruce
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