Hi Yves-Alexis
El 14/11/16 a las 10:25, Yves-Alexis Perez escribió:
On Mon, 2016-11-14 at 08:37 +0100, Laura Arjona Reina wrote:
dpkg-reconfigure lightdm
and chose "kdm" as my default desktop manager, just to try kdm.
Then when I boot the PC, I get "FAILED to start light display manager"
errors.
If I do dpkg-reconfigure lightdm and I choose lightdm again, the errors
disappear.
I guess the service is not correctly disabled when I choose a different
desktop manager.
If I should report this bug against a different package, please tell.
Hi Laura, thanks for the report. Here are few questions:
- does it happen when you install and select another display manager?
I've installed gdm and it does not happen, it seems it happens only with
kdm (it does not happen with sddm either).
- do you use sysvrc or systemd as init?
systemd
- when you select kdm, what is the content of /etc/X11/default-display-
manager?
With lightdm:
cat /etc/X11/default-display-manager
/usr/sbin/lightdm
With kdm:
/usr/bin/kdm
when I do
sudo dpkg-reconfigure lightdm and select kdm, I get this error:
ERROR: /lib/systemd/system/kdm.service is the selected default display
manager but does not exist
- where does /etc/systemd/system/display-manager.service symlink points to?
with lightdm:
/etc/systemd/system/display-manager.service ->
/lib/systemd/system/lightdm.service
with kdm:
/etc/systemd/system/display-manager.service ->
/lib/systemd/system/lightdm.service
- what does systemctl status display-manager return?
With lightdm
● lightdm.service - Light Display Manager
Loaded: loaded (/lib/systemd/system/lightdm.service; enabled; ve
Active: active (running) since lun 2016-11-14 13:19:57 CET; 1h 2
Docs: man:lightdm(1)
Process: 874 ExecStartPre=/bin/sh -c [ "$(cat /etc/X11/default-di
Main PID: 877 (lightdm)
Tasks: 5 (limit: 4915)
CGroup: /system.slice/lightdm.service
├─877 /usr/sbin/lightdm
└─936 /usr/lib/xorg/Xorg :0 -seat seat0 -auth /var/run/l
lines 1-10/10 (END)
with kdm
● lightdm.service - Light Display Manager
Loaded: loaded (/lib/systemd/system/lightdm.service; enabled; vendor
preset: enabled)
Active: failed (Result: start-limit-hit) since lun 2016-11-14
14:43:05 CET; 29min ago
Docs: man:lightdm(1)
Process: 914 ExecStartPre=/bin/sh -c [ "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/lightdm" ]
(code=exited, status=1/FAILURE)
- what does systemctl status lightdm return?
with lightdm
● lightdm.service - Light Display Manager
Loaded: loaded (/lib/systemd/system/lightdm.service; enabled; ve
Active: active (running) since lun 2016-11-14 13:19:57 CET; 1h 1
Docs: man:lightdm(1)
Process: 874 ExecStartPre=/bin/sh -c [ "$(cat /etc/X11/default-di
Main PID: 877 (lightdm)
Tasks: 5 (limit: 4915)
CGroup: /system.slice/lightdm.service
├─877 /usr/sbin/lightdm
└─936 /usr/lib/xorg/Xorg :0 -seat seat0 -auth /var/run/l
lines 1-10/10 (END)
with kdm
● lightdm.service - Light Display Manager
Loaded: loaded (/lib/systemd/system/lightdm.service; enabled; vendor
preset: enabled)
Active: failed (Result: start-limit-hit) since lun 2016-11-14
14:43:05 CET; 30min ago
Docs: man:lightdm(1)
Process: 914 ExecStartPre=/bin/sh -c [ "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/lightdm" ]
(code=exited, status=1/FAILURE)
- what does systemctl status kdm return?
with lightdm
● kdm.service - LSB: X display manager for KDE
Loaded: loaded (/etc/init.d/kdm; generated; vendor preset: enabl
Active: active (exited) since lun 2016-11-14 13:19:52 CET; 1h 18
Docs: man:systemd-sysv-generator(8)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/kdm.service
● gdm.service - GNOME Display Manager
Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor
Active: inactive (dead)
with kdm
● kdm.service - LSB: X display manager for KDE
Loaded: loaded (/etc/init.d/kdm; generated; vendor preset: enabled)
Active: active (running) since lun 2016-11-14 14:42:58 CET; 30min ago
Docs: man:systemd-sysv-generator(8)
Process: 724 ExecStart=/etc/init.d/kdm start (code=exited,
status=0/SUCCESS)
Tasks: 3 (limit: 4915)
CGroup: /system.slice/kdm.service
├─793 /usr/bin/kdm
└─795 /usr/lib/xorg/Xorg :0 vt7 -br -nolisten tcp -auth
/var/run/xauth/A:0-8AixAa
● gdm.service - GNOME Display Manager
Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor
preset: enabled)
Active: inactive (dead)
The way to select the default display manager is not completely intuitive so
there might be bugs there, but it was working just fine before so I'm a bit
puzzled (the implementation comes from gdm+kdm as far as I remember).
Answering the questions you proposed, I've realised that the problem is
not related to lightdm, it's related with kdm. Because the same problem
happens when I switch from sddm to kdm
(/etc/systemd/system/display-manager.service still points to sddm
instead of pointing to kdm), and it does not happen when I switch from
lightdm to sddm.
I'm not sure which is the better step to do now, though: reasigning this
bug report to kdm? or closing this and creating a new bug report against
kdm?
Best regards
--
Laura Arjona Reina
https://wiki.debian.org/LauraArjona
