Can't login after upgrade

salem2k · 2020-11-24 13:57:49

Hey guys,

I just finished setting up Arch, installed lightdm and xfce4 etc. did a -Syyu and now I can't login to any user caus it says 'incorrect password'.

Naturally I googled the issue and tried multiple things, but I neither got any tally lines in my system-login file nor any .pacnew files in my pam.d directory.

If someone could help me that would be great.

Thanks in advance!

Trilby · 2020-11-24 14:04:34

Which tutorial did you follow to install the system?

Were you able to log in to the installed system before installing lightdm? Can you log in as root?

salem2k · 2020-11-24 14:07:56

Trilby wrote:

Which tutorial did you follow to install the system?
Were you able to log in to the installed system before installing lightdm? Can you log in as root?

I used the standard Arch guide + a guide from a german youtuber.
Yes I was able to login befor installing lightdm and doing the -Syyu.
And yes I'm currently chrooted via the installation iso, but I'm not able to login as root via terminal or lightdm neither.

Last edited by salem2k (2020-11-24 14:08:39)

seth · 2020-11-24 14:47:59

https://bbs.archlinux.org/viewtopic.php … 2#p1922862

salem2k · 2020-11-24 15:01:01

seth wrote:

https://bbs.archlinux.org/viewtopic.php … 2#p1922862

sadly none of that worked ...

Scimmia · 2020-11-24 15:18:51

What's in the log (journal) for the failed login attempts?

salem2k · 2020-11-24 15:43:12

Scimmia wrote:

What's in the log (journal) for the failed login attempts?

so it says:
pam_unix(lightdm:auth): authentication failure; logname= uid=0 euid=0 tty=:0 ruser= rhost user=salem

and also there is:

pam_systemd_home(lightdm:auth): systemd_homed is not available: Unit dbus-org.freedesktop.home1.service not found.

seth · 2020-11-24 16:08:07

The systemd_homed message is irrelevant, is there no context to pam_unix?

Are you sure the password is ok (esp. if it contains non-ascii or non-qwerty chars)?

salem2k · 2020-11-24 16:17:22

seth wrote:

The systemd_homed message is irrelevant, is there no context to pam_unix?
Are you sure the password is ok (esp. if it contains non-ascii or non-qwerty chars)?

Password is ok, all ascii.
i've got:
PAM _pam_load_conf_file: unable to open config for system-login

and:
pam_warn(login:auth): function=[pam_sm_authenticate] flags=0 service=[login] terminal=[tty2] user=[<unknown>] ruser=[<unknown>] rhost=[<unknown>]
followed by the "FAILED LOGIN ... FROM:" logs

seth · 2020-11-24 16:37:05

Please post the journal (see first link in my signature), not some excerpts.

Also check /etc/shadow and test whether the password is actually correct.
The entry is something like

salem:$6$<salt>$<hash>:12345:0:99999:7:::

and you can replicate the <hash> with

openssl passwd -6 -salt "<salt>" "your_password_here"

The first number could also but should not be 1 or 5 - then pass that.

Last edited by seth (2020-11-24 16:37:38)

salem2k · 2020-11-24 16:45:33

seth wrote:

Please post the journal (see first link in my signature), not some excerpts.
Also check /etc/shadow and test whether the password is actually correct.
The entry is something like
salem:$6$<salt>$<hash>:12345:0:99999:7:::
and you can replicate the <hash> with
openssl passwd -6 -salt "<salt>" "your_password_here"
The first number could also but should not be 1 or 5 - then pass that.

so the hashes of the password match.

how do i extract the journal? cause arch is installed on my laptop.

seth · 2020-11-24 16:50:40

https://wiki.archlinux.org/index.php/Sy … al_to_view
What journal have you been looking at so far??

Edit: "sudo journalctl -b -1", NOT "-xe" (latter produces useless clutter on a shortened log…)

Last edited by seth (2020-11-24 16:51:36)

salem2k · 2020-11-24 17:12:18

so here is my journalctl -b -1:

http://sprunge.us/iapTC4

CarbonChauvinist · 2020-11-24 17:38:25

Perhaps related to keyboard layout of LightDM?

Last edited by CarbonChauvinist (2020-11-24 17:42:52)

salem2k · 2020-11-24 17:43:27

CarbonChauvinist wrote:

Perhaps related to keyboard layout of LightDM?

no i tried that but no success

salem2k · 2020-11-24 20:01:11

don't know what it was but reinstall did the job

seth · 2020-11-24 23:25:46

Could have been hostname issue - you had at least iwd, dhcpcd and NetworkManager enabled and there's no sight of a console login approach.
But since you nuke the system we'll never know.

Anyway, read up https://wiki.archlinux.org/index.php/Ne … figuration - esp. the note in https://wiki.archlinux.org/index.php/Ne … k_managers

Arch Linux

#1 2020-11-24 13:57:49

Can't login after upgrade

#2 2020-11-24 14:04:34

Re: Can't login after upgrade

#3 2020-11-24 14:07:56

Re: Can't login after upgrade

#4 2020-11-24 14:47:59

Re: Can't login after upgrade

#5 2020-11-24 15:01:01

Re: Can't login after upgrade

#6 2020-11-24 15:18:51

Re: Can't login after upgrade

#7 2020-11-24 15:43:12

Re: Can't login after upgrade

#8 2020-11-24 16:08:07

Re: Can't login after upgrade

#9 2020-11-24 16:17:22

Re: Can't login after upgrade

#10 2020-11-24 16:37:05

Re: Can't login after upgrade

#11 2020-11-24 16:45:33

Re: Can't login after upgrade

#12 2020-11-24 16:50:40

Re: Can't login after upgrade

#13 2020-11-24 17:12:18

Re: Can't login after upgrade

#14 2020-11-24 17:38:25

Re: Can't login after upgrade

#15 2020-11-24 17:43:27

Re: Can't login after upgrade

#16 2020-11-24 20:01:11

Re: Can't login after upgrade

#17 2020-11-24 23:25:46

Re: Can't login after upgrade

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