Error unmounting, EOF in backquote substitution Options

[urinalmint]

Hi All

I have an eeepc 901 running linux mint 10. It has recently started being unable to unmount drives.

if I try and unmount by ejecting the drive I get the error message:

/bin/umount: 1: Syntax error: EOF in backquote substitution

If it try 'umount -a' in a terminal I get the following

/bin/umount: line 1: unexpected EOF while looking for matching ``'
/bin/umount: line 2: syntax error: unexpected end of file

Googling this turns up issues where there is a ' misplaced in a file somewhere, but nobody seems to have the same issue as this!

I've checked grub & fstab and they haven't been modified since first install, /bin/umount isn't readable in any editor I've tried. Incidentally mounting & unmounting ISO files works without issue....

Can anyone shed some light on how to resolve this?

Cheers

[michaelk]

umount is a binary program and not a simple bash script.

What happens when you manually try to unmount the drive. i.e. type the full command
umount /mount/point (do not forget to use the real mount point)