After updating also the NFS server, after fiddling a bit with NFS parameters, after hitting my head around the room... i've found a solution.
AFAIK NFSv3 use a ''nonstandard'' ACL mechanism that works well only for POSIX ACL, while NFSv4 use a more complex one, suited to take into account different ACL schemas. I use POSIX ACL, so NFSv3 is well suited for me. Simply i've had in /etc/fstab: dixie:/srv/wviola/sources /srv/wviola/sources nfs acl 0 0 and worked perfeclty[1] just before rebooting the NFS client machine. Now i was forced to put instead: dixie:/srv/wviola/sources /srv/wviola/sources nfs nfsvers=3,acl 0 0 so seems to me that ''something'' changed the default NFS version from 3 to 4. Trying to downgrade lead me to the suspect that the guilty is not the kernel; but really i've gone back on upgrade history and found nothing related to NFS of mount upgraded recently... Boh... [1]: i was sure because i've a cron script that hourly try to mangle ACLs, and never complained about missing ACL before the reboot... -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org