I have a little problem with my Ubuntu system.

When selecting boot on startup for a harddrive, the partition can't be mounted. The error which occurs is as follows:

dmesg | tail 
[  470.027891] EXT4-fs (sda2): Unrecognized mount option "x-gvfs-show" or missing value

The corresponding /etc/fstab entry is:

/dev/disk/by-uuid/d0e8607e-9067-49c9-929e-83ec7f70cea1 /mnt/d0e8607e-9067-49c9-929e-83ec7f70cea1 auto nosuid,nodev,nofail,x-gvfs-show 0 0

Also in the GUI:

Unable to mount

Error while mounting

2 Answers 2


Short version:

You're not using the parameter as it was designed. Use comment=x-gvfs-show instead of x-gvfs-show...

Long version:

  • Don't use the GUI but edit your fstab manually by pressing Ctrl+Alt+T to go to a terminal and typing:

    sudo nano /etc/fstab
  • find the offending line that shows x-gvfs-show and type comment= in front of it

  • Ctrl+X
  • Save
  • Yes
  • reload all entries in fstab:

    mount -a

(Or if you just moved over from Windows: don't type mount -a and just reboot for old times' sake) ;-)

  • I guess him didn't use the command, just copied from dmesg. It's a mistake of the mount commands of Nautilus or a fail with the drive. This message is shown, but we don't know where to chage it's value.
    – m3nda
    Aug 8, 2015 at 11:45
  • @erm3nda: edited question to make it more beginner-friendly! ;-)
    – Fabby
    Aug 8, 2015 at 20:34
  • 1
    Okey, fixed fstab with your suggestion. Someone didn't pay attention to that :) right? Thank you.
    – m3nda
    Aug 9, 2015 at 12:40
  • Can this answer be improved with instructions on how to manually mount the drive without having to boot from a live cd or usb in order to edit /etc/fstab?
    – Simón
    Dec 29, 2015 at 3:28
  • 1
    @Simón: Better now? (It only took me a year and 2 days to finally do as you requested)
    – Fabby
    Jan 1, 2017 at 7:15

I thought I would add this here.

I recently switched one of my pc's from Ubuntu to Xubuntu (not with a clean install).

My external USB hard drives would no longer automount. Checking in gnome-disks they were set to automount but did not.

So I switched to manual mounting (which generates entries in /etc/fstab). The manual mount options were automatically populated with x-gvfs-show (no "comment="), which resulted in a failure to mount.

What I'm suggesting is that the fstab entries with x-gvfs-show may not have been manually generated.

  • I can confirm this. I formatted and mounted a partition through the GUI and it added this option causing a failure to boot at mount.
    – Coljac
    May 15, 2017 at 4:11

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