Hello Kleber, I see you work in Hamburg, too (I hope that's your first name).
So, I installed the kernel "5.11.0-25" again and restarted the PC - same behaviour as before. Here is my fstab with the mountpoint: #/etc/fstab //w.x.y.z./fritzbox/USB_FB/ /media/FritzBox.NAS cifs credentials=/home/florian/.smbcredentials,uid=1000,gid=1000,vers=3.0,noserverino,x-systemd.automount,x-systemd.requires=network-online.target 0 0 Yes, the module cifs is loaded root@xxxxx:/media/FritzBox.NAS# lsmod | sort | grep cifs cifs 1146880 2 fscache 380928 1 cifs libarc4 16384 1 cifs libdes 24576 1 cifs Yes, the kernel module is installed root@xxxxx:/media/FritzBox.NAS/florian# apt list | grep linux-modules-5.11.0-25 linux-modules-5.11.0-25-generic/focal-updates,focal-security,now 5.11.0-25.27~20.04.1 amd64 [Installiert,automatisch] Restart with kernel "5.4.0-80", everything works again. I hope this helps to isolate the problem. Regards, Florian -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939164 Title: Samba fstab mount does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs