Public bug reported:

After bug #1778322 is fixed (just needs a gvfs rebuild with newer
samba), samba machines will start to show up again in the "windows
network" tab in nautilus. But if a server has disabled the SMB1
protocol, nautilus will show an error when that server is clicked on,
instead of showing the shares list.

Even with SMB1 disabled, it should still be technically possible to get
a share list, since smbclient can do it:

andreas@nsnx:~$ nmblookup -A 192.168.122.101
Looking up status of 192.168.122.101
        D-NO-SMB1       <00> -         B <ACTIVE> 
        D-NO-SMB1       <03> -         B <ACTIVE> 
        D-NO-SMB1       <20> -         B <ACTIVE> 
        ..__MSBROWSE__. <01> - <GROUP> B <ACTIVE> 
        WORKGROUP       <00> - <GROUP> B <ACTIVE> 
        WORKGROUP       <1d> -         B <ACTIVE> 
        WORKGROUP       <1e> - <GROUP> B <ACTIVE> 

        MAC Address = 00-00-00-00-00-00

andreas@nsnx:~$ smbclient -L 192.168.122.101 -N
WARNING: The "syslog" option is deprecated

        Sharename       Type      Comment
        ---------       ----      -------
        print$          Disk      Printer Drivers
        pub_no_smb1     Disk      
        IPC$            IPC       IPC Service (d-no-smb1 server (Samba, Ubuntu))
Reconnecting with SMB1 for workgroup listing.
protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE
Failed to connect with SMB1 -- no workgroup available

andreas@nsnx:~$ smbclient //192.168.122.101/pub_no_smb1 -U ubuntu%ubuntu -m NT1
WARNING: The "syslog" option is deprecated
protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE

andreas@nsnx:~$ smbclient //192.168.122.101/pub_no_smb1 -U ubuntu%ubuntu -m SMB2
WARNING: The "syslog" option is deprecated
Try "help" to get a list of possible commands.
smb: \> dir
  .                                   D        0  Fri May  3 18:16:38 2019
  ..                                  D        0  Fri May  3 18:15:24 2019
  hello.txt                           N       21  Fri May  3 18:16:12 2019
  hello-from-nsnx.txt                 A        9  Fri May  3 18:16:38 2019

                20509264 blocks of size 1024. 13121800 blocks available

** Affects: gvfs
     Importance: Unknown
         Status: Unknown

** Affects: gvfs (Ubuntu)
     Importance: Medium
         Status: New

** Bug watch added: gitlab.gnome.org/GNOME/gvfs/issues #307
   https://gitlab.gnome.org/GNOME/gvfs/issues/307

** Also affects: gvfs via
   https://gitlab.gnome.org/GNOME/gvfs/issues/307
   Importance: Unknown
       Status: Unknown

** Summary changed:

- gvfs can't browse smb servers that disabled SMB1
+ gvfs can't list shares from smb servers that disabled SMB1

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https://bugs.launchpad.net/bugs/1828107

Title:
  gvfs can't list shares from smb servers that disabled SMB1

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