[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=375536

Nate Graham  changed:

   What|Removed |Added

 CC||n...@kde.org
 Resolution|--- |DUPLICATE
 Status|REPORTED|RESOLVED

--- Comment #18 from Nate Graham  ---


*** This bug has been marked as a duplicate of bug 339452 ***

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Reuben]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #17 from Reuben  ---
I spoke too soon. I left the laptop for a couple hours and it suspended; the
keyboard was unresponsive (to KDE) when I returned. Alt sysrq reisub worked,
but I couldn't restart X or switch to different TTYs.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Reuben]

https://bugs.kde.org/show_bug.cgi?id=375536

Reuben  changed:

   What|Removed |Added

 CC||k...@flavor8.com

--- Comment #16 from Reuben  ---
sudo chmod +s /sbin/unix_chkpwd fixed it for me too.

This bug somehow happened to my computer during a dist-upgrade from Ubuntu
18.04 to 18.10.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #15 from Mihai Sorin Dobrescu  ---
This fixed it for me: chmod +s /sbin/unix_chkpwd

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=375536

alex...@gmx.net changed:

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 CC||alex...@gmx.net

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=375536

Mihai Sorin Dobrescu  changed:

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 CC||msdobre...@gmail.com

--- Comment #14 from Mihai Sorin Dobrescu  ---
I have this issue too. I have a Sabayon 64 bit fully up to date, on an i7 +
nVidia GTX 560Ti card with 390.42 driver version and kernel 4.16, KDE Plasma is
version 5.49.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[utux]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #13 from utux  ---
Ah! 
Good news from/for me at least. On my system, somehow /sbin/unix_chkpwd ended
up as root:root 0711. I checked on two other systems, they both had root:root
4711.
After I changed the rights the screensaver could unlock again. 
No idea how that file ended up losing its SUID bit but I would suspect that
that is more gentoo's fault than that Kde catches any blame for it.

If you hit this bug, please check your /sbin/unix_chkpwd mode and ownership and
compare it to that of a known-good install for your distro.

utux

Status: worksforme

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[utux]

https://bugs.kde.org/show_bug.cgi?id=375536

utux  changed:

   What|Removed |Added

 CC||b...@ultratux.org

--- Comment #12 from utux  ---
I'm confident this is the same bug as #339452, but that one is much older. I
can confirm everything that's been reported here. From the log entries:

Aug 27 18:32:23 [unix_chkpwd] password check failed for user (foobar)
Aug 27 18:32:23 [kcheckpass] pam_unix(kde:auth): authentication failure;
logname= uid=1000 euid=1000 tty=:0 ruser= rhost=  user=foobar
Aug 27 18:32:23 [kcheckpass] Authentication failure for foobar (invoked by uid
1000)
Aug 27 18:32:32 [unix_chkpwd] check pass; user unknown

...right down to the unhelpful "Only binary protocol supported" message when
invoking /usr/lib64/libexec/kcheckpass directly from the commandline.

My system runs gentoo, no systemd, kde 17.08.0 / plasma 5.10.4

I would be very grateful to hear how I can unlock from commandline when this
happens, because for obvious reasons 'loginctl unlock-sessions' doesn't work
here (no systemd, hence no loginctl)

What logs or tests do you require from me to get more info?

utux

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #11 from nono31...@gmail.com ---
No I haven't. Or at least not willingly.
I don't remember ever touching anything called PAM.

I have however had a few issues a few months ago with SDDM and successively
installed and uninstalled other display manager like lightDM.
Could that have any effect on PAM ?

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Martin Gräßlin]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #10 from Martin Gräßlin  ---
(In reply to nono31393 from comment #9)
> When I run kcheckpass (in /usr/lib in Arch) from Konsole while logged in I
> have an "Authentication failure" error message and a return code of 1.

This means the communication with the auth backends is broken. Have you
reconfigured PAM in some way?

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #9 from nono31...@gmail.com ---
When I run kcheckpass (in /usr/lib in Arch) from Konsole while logged in I have
an "Authentication failure" error message and a return code of 1.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Martin Gräßlin]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #8 from Martin Gräßlin  ---
Please try to invoke the application "kcheckpass" directly on the command line.
It takes your password and should return 0 if it authenticated you.

Please note that kcheckpass is in a weird location. Best check where your
distribution installs it to

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #7 from nono31...@gmail.com ---
I am currently running KDE 5.9.4.

When I try to log in after locking my PC from KDE, I can effectively now see
the characters I'm typping thanks to the eye icon. 

The characters I am typing are effectively the ones entered in the password
box. There seems to be no keyboard layout issue. 

Unfortunately I am still unable to log back into my computer even with the
correct password entered in the password text box.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Martin Gräßlin]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #6 from Martin Gräßlin  ---
> I'll wait for Plasma 5.9 then and come back with the results then.

any news?

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Kestutis]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #5 from Kestutis  ---
It was my own fault, after messing with /etc/shadow and /etc/gshadow, I had
them in a wrong group. 
chgrp shadow /etc/shadow  and /etc/gshadow fixed it.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Kestutis]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #4 from Kestutis  ---
ok, so I manage to find some logs related to this:

/var/log/auth.log
9 14:13:12 DebianStretchPC unix_chkpwd[6242]: check pass; user unknown
Mar  9 14:13:12 DebianStretchPC unix_chkpwd[6243]: check pass; user unknown
Mar  9 14:13:12 DebianStretchPC unix_chkpwd[6243]: password check failed for
user (kiesha)
Mar  9 14:13:12 DebianStretchPC kcheckpass[6241]: pam_unix(kde:auth):
authentication failure; logname= uid=1000 euid=1000 tty=:0 ruser= rhost= 
user=kiesha
Mar  9 14:13:12 DebianStretchPC kcheckpass[6241]: Authentication failure for
kiesha (invoked by uid 1000)
Mar  9 14:13:18 DebianStretchPC lightdm: pam_unix(lightdm-greeter:session):
session opened for user lightdm by (uid=0)
Mar  9 14:13:18 DebianStretchPC systemd-logind[494]: New session c10 of user
lightdm.
Mar  9 14:13:27 DebianStretchPC lightdm: pam_unix(lightdm-greeter:session):
session closed for user lightdm
Mar  9 14:13:30 DebianStretchPC sudo:   kiesha : TTY=pts/1 ; PWD=/home/kiesha ;
USER=root ; COMMAND=/usr/bin/tail -n 70 /var/log/auth.log
Mar  9 14:13:30 DebianStretchPC sudo: pam_unix(sudo:session): session opened
for user root by kiesha(uid=0)

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Kestutis]

https://bugs.kde.org/show_bug.cgi?id=375536

Kestutis  changed:

   What|Removed |Added

 CC||kestuti...@gmail.com

--- Comment #3 from Kestutis  ---
Same here, except my keyboard layout is IE. 
I had SDDM , and thought that bug was SDDM related, therefore switched to
Lightdm.
Even after "apt-get purge sddm" I found plenty lefover files.And my lockscreen
is still old SDDm theme. But what I do, is start a new session (after failed
login), where I get lightdm themed screenlock, then after typing password I'm
brought back to old session.
Other way is from tty1 issue :
loginctl unlock-sessions

Its Debian Stretch, amd64, intel graphic.
I'm noob , but I wish I could help here, and if any logs would help, please let
me know. 
Thanks

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #2 from nono31...@gmail.com ---
Thanks, I'll be reporting bugs more quickly in the future.

I just checked and unfortunately I do not have a selection icon on the lock
screen for changing the keyboard layout.

I'll wait for Plasma 5.9 then and come back with the results then.

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[kscreenlocker] [Bug 375536] Password error after suspend / sleep / lock

[Martin Gräßlin]

https://bugs.kde.org/show_bug.cgi?id=375536

--- Comment #1 from Martin Gräßlin  ---
> I was expecting to see it fixed with an update but as this is still going on 
> I though I'd better do a bug report.

This issue has not been reported yet. In future better directly report the bug,
don't wait for "magic" to happen.

For this specific issue: check on the bottom left corner which keyboard layout
is used. Maybe even try to switch it. There is not much more I can provide as
hint.

With Plasma 5.9 there will be a new button on the lock screen input field which
allows to trigger the clear text. If the issue is not fixed by switching the
layout I suggest to wait till 5.9 is available in Arch and then check what is
actually typed.

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