This is a re-reporting acc.
https://bugzilla.novell.com/show_bug.cgi?id=755603#c14

See below test case.

OS Information
   OS:     Linux 4.12.14-lp151.28.20-default x86_64
   System: openSUSE Leap 15.1
   Qt:     5.9.7
   KDE:    5.55.0
   Plasma: 5.12.8

Upgraded from Leap 15.0 with `zypper dup`

Issue also was present on Leap 15.0 but *not* in OpenSuse 42.3!

Differences from https://bugzilla.novell.com/show_bug.cgi?id=755603#c0
- Variables $GNOME_KEYRING_CONTROL and $GNOME_KEYRING_PID are not defined

Besides

```
srwxr-xr-x 1 peter cpn 0 Nov  3 14:50 /var/run/user/500/keyring/control
```
there seems to be no other keying present (only user 500 is logged in)



Test case:
==========

Create a new user 'hugo', then 


@peter:

```
logger "TEST: su - hugo"
su - hugo
```

@journalctl -f:

```
Nov 03 19:20:54 nue-p1.nue.private peter[18068]: TEST: su - hugo
Nov 03 19:20:58 nue-p1.nue.private su[18070]: The gnome keyring socket is not
owned with the same credentials as the user login:
/run/user/500/keyring/control
Nov 03 19:20:58 nue-p1.nue.private su[18070]: gkr-pam: couldn't unlock the
login keyring.
Nov 03 19:20:58 nue-p1.nue.private su[18070]: (to hugo) peter on pts/1
Nov 03 19:20:58 nue-p1.nue.private su[18070]: pam_unix(su-l:session): session
opened for user hugo by peter(uid=500)
```

@hugo:

```
id | logger
logger "TEST: su exit"
logout
```

@journalctl -f:

```
Nov 03 19:21:01 nue-p1.nue.private peter[18115]: uid=1003(hugo) gid=100(users)
groups=100(users)
Nov 03 19:21:10 nue-p1.nue.private peter[18117]: TEST: su exit
Nov 03 19:21:12 nue-p1.nue.private su[18070]: pam_unix(su-l:session): session
closed for user hugo
```

Note:
=====

On 42.3 there always appeared a `kdeinit`-entry exactly before the `su`-entry
in the journal:

```
Apr 08 09:05:57 nue-p1.nue.private kdeinit5[20831]: 
Apr 08 09:06:00 nue-p1.nue.private su[26462]: (to root) peter on pts/1
Apr 08 09:06:00 nue-p1.nue.private su[26462]: pam_unix(su-l:session): session
opened for user root by peter(uid=500)
```

which is missing on Leap 15.1:

```
Nov 03 19:15:41 nue-p1.nue.private su[17871]: The gnome keyring socket is not
owned with the same credentials as the user login:
/run/user/500/keyring/control
Nov 03 19:15:41 nue-p1.nue.private su[17871]: gkr-pam: couldn't unlock the
login keyring.
Nov 03 19:15:41 nue-p1.nue.private su[17871]: (to hugo) peter on pts/1
Nov 03 19:15:41 nue-p1.nue.private su[17871]: pam_unix(su-l:session): session
opened for user hugo by peter(uid=500)
```