Let us know if purging winbind removed the idmap errors. The rest of this bug looks a lot like bug 264943, could you try the PPA release posted there (see https://bugs.launchpad.net/ubuntu/+source/samba/+bug/264943/comments/89)
Let us know if purging winbind removed the idmap errors. /bugs.launchpad .net/ubuntu/ +source/ samba/+ bug/264943/ comments/ 89)
The rest of this bug looks a lot like bug 264943, could you try the PPA release posted there (see https:/