Since today all my devices stoped showing in nautilus sidebar. I still can do manual mount, but it's not very convenient.
I also reinstalled autofs with sudo apt-get install --reinstall autofs
but it didn't work.
Also checked gnome media-handling options and are set ok with checked automount and automount-open
I tried usbmount but only works for USB devices so I rewmoved it, I can't see any device in the sidebar, internal or external, the only device shown is a manual fstab mounted internal disk.
I'm really sorry but it seems my mistake.
I have some CIFS mounts in fstab, so if the CIFS server is down, it affects nautilus and it doesn't display local devices, even local unmounted hard drives and USB thumb drives connected after boot.
Theese are the lines of my CIFS mount in fstab
I think that x-systemd.automount is messing with autofs or something, preventing displaying the other connected drives if the CIFS server is down.