PAM authentication error causes SDDM crash

[axease]

I can't login to my desktop.

the sddm crash when i upgrade sddm to 0.21.0 version.

the boot log
```
Dec 08 09:24:25 ase-laptop sddm[1582]: Greeter starting...
Dec 08 09:24:25 ase-laptop sddm-helper[744438]: [PAM] Starting...
Dec 08 09:24:25 ase-laptop sddm-helper[744438]: [PAM] Authenticating...
Dec 08 09:24:25 ase-laptop sddm-helper[744438]: [PAM] returning.
Dec 08 09:24:25 ase-laptop sddm-helper[744438]: pam_unix(sddm-greeter:session): session opened for user sddm(uid=219) by (uid=0)
Dec 08 09:24:25 ase-laptop sddm-helper[744438]: Writing cookie to "/tmp/xauth_WTrkau"
Dec 08 09:24:25 ase-laptop sddm-helper[744438]: Starting X11 session: "" "/usr/bin/sddm-greeter --socket /tmp/sddm-:0-RRbQsB"
Dec 08 09:24:25 ase-laptop sddm[1582]: Greeter session started successfully
Dec 08 09:24:25 ase-laptop sddm[1582]: Message received from greeter: Connect
Dec 08 09:24:30 ase-laptop sddm[1582]: Message received from greeter: Login
Dec 08 09:24:30 ase-laptop sddm[1582]: Reading from "/usr/share/xsessions/plasma.desktop"
Dec 08 09:24:30 ase-laptop sddm[1582]: Session "/usr/share/xsessions/plasma.desktop" selected, command: "/usr/bin/startplasma-x11" for VT 2
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: [PAM] Starting...
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: [PAM] Authenticating...
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: [PAM] Preparing to converse...
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: [PAM] Conversation with 1 messages
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: gkr-pam: unable to locate daemon control file
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: [PAM] returning.
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: gkr-pam: stashed password to try later in open session
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: pam_kwallet5(sddm:auth): pam_kwallet5: pam_sm_authenticate
Dec 08 09:24:30 ase-laptop sddm[1582]: Authentication for user "as6" successful
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: pam_kwallet5(sddm:setcred): pam_kwallet5: pam_sm_setcred
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: pam_unix(sddm:session): session opened for user as6(uid=1000) by as6(uid=0)
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: gkr-pam: gnome-keyring-daemon started properly and unlocked keyring
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: pam_kwallet5(sddm:session): pam_kwallet5: pam_sm_open_session
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: Writing cookie to "/tmp/xauth_BRtllS"
Dec 08 09:24:30 ase-laptop sddm-helper[744464]: Starting X11 session: "" "/usr/share/sddm/scripts/Xsession \"/usr/bin/startplasma-x11\""
Dec 08 09:24:30 ase-laptop sddm[1582]: Session started true
Dec 08 09:24:30 ase-laptop sddm[1582]: Auth: sddm-helper exited successfully
Dec 08 09:24:30 ase-laptop sddm[1582]: Greeter stopped. SDDM::Auth::HELPER_SUCCESS
Dec 16 21:18:03 ase-laptop sddm[1582]: Authentication error: SDDM::Auth::ERROR_INTERNAL "Process crashed"
Dec 16 21:18:03 ase-laptop sddm[1582]: Auth: sddm-helper (--socket /tmp/sddm-auth-430ceeef-fd17-4d0f-b8a7-69034c801322 --id 3 --start /usr/bin/startplasma-x11 --user as6) crashed (exit >
Dec 16 21:18:03 ase-laptop sddm[1582]: Authentication error: SDDM::Auth::ERROR_INTERNAL "Process crashed"
Dec 16 21:18:03 ase-laptop sddm[1582]: Auth: sddm-helper exited with 1
Dec 16 21:18:03 ase-laptop systemd[1]: Stopping sddm.service...
Dec 16 21:18:03 ase-laptop sddm[1582]: Signal received: SIGTERM
```

i try to use lightdm to login. then success. i change the file of '/etc/sddm.conf.d/01gentoo.conf'. add the Autologin user config, then i success login de.


i wan to find the reason why sddm crash. please help me.

pam

```
cat /etc/pam.d/sddm
#%PAM-1.0

auth substack system-login
-auth optional pam_gnome_keyring.so
-auth optional pam_kwallet5.so

account substack system-login

password substack system-login
-password optional pam_gnome_keyring.so use_authtok

session optional pam_keyinit.so force revoke
session substack system-login
-session optional pam_gnome_keyring.so auto_start
-session optional pam_kwallet5.so auto_start
```

```
cat /etc/pam.d/sddm-autologin
#%PAM-1.0
auth required pam_env.so
auth required pam_faillock.so preauth
auth required pam_shells.so
auth required pam_nologin.so
auth required pam_permit.so
-auth optional pam_gnome_keyring.so
-auth optional pam_kwallet5.so
account include system-local-login
password include system-local-login
session include system-local-login
-session optional pam_gnome_keyring.so auto_start
-session optional pam_kwallet5.so auto_start
```

```
cat /etc/pam.d/sddm-greeter
#%PAM-1.0

# Load environment from /etc/environment and ~/.pam_environment
auth required pam_env.so

# Always let the greeter start without authentication
auth required pam_permit.so

# No action required for account management
account required pam_permit.so

# Can't change password
password required pam_deny.so

# Setup session
session required pam_unix.so
session required pam_systemd.so
```

[eccerr0r]

Are you sure it's a pam issue and not that /usr/bin/startplasma-x11 crashed?
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

[axease]

[eccerr0r]

Can you get into X11 / plasma manually without sddm?

I don't know anything about plasma: what does /usr/bin/startplasma-x11 do?

Like in xfce4 you can run /usr/bin/startxfce4 to start xfce4 from a VT ...
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

[axease]