gnome-screensave pam_unix_auth

nolochemical · 2009-07-31 18:37:55

Greetings,

Seem to be having issues with gnome screen saver. After unlocking from lockscreen, I get a black screen flicker. Checking logs shows

gnome-screensaver-dialog: pam_unix_auth(gnome-screensaver:auth): conversation failed

Found a fix ( post #13 ) https://bugs.launchpad.net/ubuntu/+sour … bug/227994 for ubuntu users. Wondering if this will work in arch.

( post #12 )
[ current perms ]
-rw------- 1 root root 522 2009-07-31 13:14 /etc/gshadow
-rw------- 1 root root 455 2009-07-20 18:41 /etc/gshadow-

Cheers,

~nolo

Last edited by nolochemical (2009-07-31 18:43:51)

djszapi · 2009-08-08 00:41:59

Hello nolochemical!

If it works you can change to solved.

nolochemical · 2009-08-08 02:17:57

I did not get a chance to try the fix. Thought I would continue testing the screensaver over a few days.

What really sucks is that /etc/gshadow was overwritten today by a version upgrade.

[2009-08-07 17:29] Fixing gshadow file ...
[2009-08-07 17:29] upgraded shadow (4.1.4.1-1 -> 4.1.4.2-1)

The permissions remain the same; yet no error, black screen flicker, or pam_auth errors. I cant confirm if it was the upgrade rewritting gshadow that did it, so I'm going to continue watching the logs untill monday or so.. I will post the results.

nolochemical · 2009-08-09 16:44:35

Error remains. In previous posts 2 fixes were offered.

#1) sudo chgrp shadow /etc/shadow
- There does not seem to be a group ' shadow ' within arch and I dont want to add one for a screensaver

#2
sudo chown root:shadow /sbin/unix_chkpwd
sudo chmod 2755 /sbin/unix_chkpwd
- same idea here ..

Current looks like its perms are setuid to root
-rwsr-sr-x 1 root root 29399 2009-03-09 13:35 unix_chkpwd

I think I can partially validate fix #2 above with information from this post( #2 ). [ http://bbs.archlinux.org/viewtopic.php?id=36134 ]

Going to try below, I'm not sure where/how to describe the why? but I think its pointing to bug in libpam

sudo chmod -s /sbin/unix_chkpwd

More info soon.

nolochemical · 2009-08-09 16:58:57

I was locked out with -rwxr-xr-x /sbin/unix_chkpwd

and -rwsr-sr-x /sbin/unix_chkpwd gives the same error. Next stop is re-installing pam.

Arch Linux

#1 2009-07-31 18:37:55

gnome-screensave pam_unix_auth

#2 2009-08-08 00:41:59

Re: gnome-screensave pam_unix_auth

#3 2009-08-08 02:17:57

Re: gnome-screensave pam_unix_auth

#4 2009-08-09 16:44:35

Re: gnome-screensave pam_unix_auth

#5 2009-08-09 16:58:57

Re: gnome-screensave pam_unix_auth

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