IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 1 November 2016   (all times are UTC)

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12:52
<al-geo>
cyberorg please help. i am trying to rum gui program on startup but not successfully. http://paste.opensuse.org/18086903 its info what i think help you to understand problem
12:53
line 4 in http://paste.opensuse.org/18086903 is false
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19:45
<MRH2>
Hi I am trying to unlock a screen that is running mdm/cinnamon 3 on a fat client - it was suggested i try LDM_PASSWORD_HASH=true
19:46
but doesn;t seem to work
19:46
cinnamon is using pam to authenticate
19:47
and the option in the config file (on cinnamon) is PamStack=mdm
19:48
should it be something else?
20:12
<vagrantc>
no idea what mdm is
20:19
<MRH2>
copy of gdm afaik
20:20
like in gnome gdm.conf where u have PamStack=gdm
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21:02
<MRH2>
where is it possible to find more info about LDM_PASSWORD_HASH
21:15
<quinox>
man lts.conf
21:15
LDM_PASSWORD_HASH
21:16
boolean, default False
21:16
When set to True, this will create a proper shadow entry on the client, allowing for screen locking, and other things which require authentication to work. Note, this allows you to
21:16
change your password locally, or possibly other actions such as sudo, but these changes are only temporary and will not persist on reboot.
21:16
versions: LDM 2.2.14+, LTSP 5.5.2+
21:19
for more documentation I think you'll have to reach the source
21:27
<MRH2>
ok i think i got it
21:27
shadow is is only readable by group shadow
21:28
<vagrantc>
that should definitely be very restrictive
21:29
the LDM code to update the password runs as root, so should be able to update it
21:29
!shell
21:29
<ltsp>
I do not know about 'shell', but I do know about these similar topics: 'shell-screen', 'gnome-shell'
21:29
<vagrantc>
!shell-screen | echo MRH2
21:29
<ltsp>
MRH2 shell-screen: One way to get local root access to troubleshoot a thin client is to use a shell SCREEN: https://help.ubuntu.com/community/UbuntuLTSP/ClientTroubleshooting#Using%20a%20shell%20SCREEN
21:41
<MRH2>
thanks
21:41
ok i can read /etc/shadow
21:41
i can see the entry for the logged in user that wa added
21:42
now how does the - let's say gnome 3 - screen lock authenticate against it
21:43
<vagrantc>
probably /etc/pam.d/common-auth
21:43
which is probably included by an application specific file in /etc/pam.d/
21:44
and pam_unix in common-auth is probably what it should be authenticating against
21:44
it's been a while since i've disected the pam stack enough to remember off the top of my head
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21:52
<MRH2>
thanks
21:55
<alkisg_web>
MRH2: try `su - username`, if you can authenticate with su, then the screensaver should also work
21:55
Note that ltsp doesn't support any other display managers than LDM, so you're probably *not* using MDM
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21:56
<MRH2>
ok so what happens to all the gnome config files that say gdm
21:57
<alkisg_web>
For example?
21:59
<MRH2>
i was trying to mess around with a local gdm.conf file for example
21:59
but guess that is just not used
21:59
<alkisg_web>
Since gdm isn't running, which app will read gdm.conf, wherever that is?
22:01
<MRH2>
i was trying to figure out where the screen lock is getting it from
22:02
<alkisg_web>
It should be pam's common-auth
22:02
Does the `su` command work?
22:02
<MRH2>
yep
22:03
just not the screenlock
22:03
<alkisg_web>
And screensaver unlocking doesn't work? That's strange
22:03
Which screensaver is that? ps aux|grep screen
22:08
<MRH2>
cinnamon-screensaver and cinnamon-screensaver-dialog
22:09
<alkisg_web>
Btw, verify that mdm/gdm are not running, while ldm is... right?
22:16
<vagrantc>
MRH2: this is on linux mint, if i recall?
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22:28
<MRH2>
yep almost there except for the screen locking
22:29
mdm is also running
22:32
with xorg and the greeter login
22:32
everything else is running under ldm
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22:39
<MRH2>
and separate xorg process
22:44
etc/pam.d/cinnamon-screensaver has @include common-auth
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22:48
<MRH2>
do i need to @include common-session ?
22:52
<vagrantc>
you might want to look at /var/log/auth.log or other related logs on the client
22:52
after attempting to login with the screensaver
23:37
<MRH2>
mdm display manager was a service inherited from the server image i'll add it to the list of excludes (doesn't seem to relate to this though)
23:37
i'l check that log s suggested :)