pam_mount doesn't mount when using sgrp

[CMAH]

Prior to version 2:4.3.8+dfsg this worked:
<volume icase="no" sgrp="SOME_NON_PRIMATY_GROUP" fstype="cifs" server="10.10.10.1" path="my/Shared Folder/Here" mountpoint="/home/%(USER)/SOME_NON_PRIMATY_GROUP" options="uid=%(USER),gid=SOME_NON_PRIMATY_GROUP,iocharset=utf8,file_mode=0770,dir_mode=0770,workgroup=my.domain" />
Now it doesn't mount and doesn´t even show an attempt or errors in auth.log.
Mount by primary group (gid) still works.

[Marc Deslauriers (mdeslaur)]

Hi, thanks for reporting this.

Have you tried 4.3.9 that got released as an update?

[CMAH (informacica)]

Hello.
I should have said this earlier (this is my first bug report), I am know on version 4.3.9 and the mount still doesn't happen.
Also, this works fine:
<volume icase="no" gid="MyPrimaryGroupGID" fstype="cifs" server="10.10.10.1" path="my/Shared Folder/Here" mountpoint="/home/%(USER)/SOME_NON_PRIMATY_GROUP" options="uid=%(USER),gid=SOME_NON_PRIMATY_GROUP,iocharset=utf8,file_mode=0770,dir_mode=0770,workgroup=my.domain" />
This led me to believe the problem is in sgrp.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Eduardo Santos de Moraes (emoraes25)]

I confirm the bug, because since version "2:4.3.8+dfsg-0ubuntu0.14.04.2" current "2:4.3.9+dfsg-0ubuntu1" that cifs volumes with the attribute "sgrp" in pam_mount are unmounted.

[Emiliano Vavassori (syntaxerrormmm)]

Hi,

Just try to see if this fixes:
* Upgrade to the latest version (on 14.04, 4.3.9);
* Add to /etc/samba/smb.conf file in the [global] section on the client:
    winbind expand groups = 1
* Restart smbd, nmbd and winbind

Fixed your same issue. sgrp seems to mount right after this procedure.

[Christian Ehrhardt  (paelzer)]

@CMAH:
Per the former comment, does that mean this was just a change to the way Samba handles its configuration and is "winbind expand groups = 1" a valid fix on the config side?