LXDE, screenlock not working
 

I have a problem with lxde-screenlock.desktop, command lxlock exits with this error:

"Not running inside a display manager, XDG_SEAT_PATH not defined"

Indeed, XDG_SEAT_PATH is not set, should I do it manually and with what value?

I think one of recent apt upgrades is the cause.
Using Debian_testing_amd64.

Thanks.

Hi,

is lxlock exiting prematurely? Or have you just noticed that when it does exit it reports that message?

Also, how are you launching lxde? Are you using lxsession?

If you are running a proper lxsession I suspect that it should be set (I use ck-launch-session and that variable is set).
It seems lxsession was upgraded from 4.6 to 4.9 recently:
http://ftp-master.metadata.debian.or....2-1_changelog
(also in your /usr/share/doc/lxsessoin/changelog.Debian.gz)
It would not be amazing if this upgrade introduced a bug.

Evo2.

thanks evo2.
when I click on lock icon on taskbar, or press ctrl+alt+L nothing happens. so I tried lxlock from bash and it exited with that error (and without locking screen).
it seems I'm using lxsession: 00:00:00 /usr/bin/lxsession -s LXDE -e LXDE

don't know how its started, I'm using gdm3

edit: that last update of lxsession removed this:
[REMOVE, DEPENDENCIES] lxsession-edit:amd64

Do you have lxpolkit installed?

Jim, no lxpolkit is not installed. If I try to install it, aptitude says that lxsession conflicts with it.

I still have this problem :/

Jim, lxpolkit command seems to be part of lxsession now. if I don't start it manually, I can't change advanced settings in 'users and groups' for eg. (but screenlock doesn't work either way)

Does it mean lxpolkit need to be run in ~/.config/lxsession/LXDE/autostart?

thanks.

Al least in my system (Debian 8 64-bit), $XDG_SEAT_PATH is not defined, but lxlock works perfectly with xscreensaver installed. I would first check the following:
(1) is xscreensaver installed in your system?
(2) is the user you are logged in the "powerdev" group?

thanks for the reply.

1) yes
2) yes

I just recall an update, on same system as yours (Debian testing 64 bit), and around the time you first posted the problem here. For some reason, LXDE dependencies were broken after that update. What I did (and it worked) was to uninstall everything related to LXDE (purge), and reinstall it again (via aptitude). I believe it is worth a try, if you didn't try that yet, that is.

I purged and reinstalled: lxde-core, lxde, lxsession
but it didn't help.


edit: it seems 'Lock Screen (xscreensaver)' works, so I'll just use that instead of 'ScreenLock'.