Modern automounters and umount

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

during a discussion on linuxquestion.org i got a (Mint) user's report
that an automounted DVD cannot be unmounted manually:

https://www.linuxquestions.org/questions/linux-general-1/compiling-xfburn-source-code-additional-packages-required-4175667265/page7.html#post6092450
> $ mount | fgrep /dev/sr0
> /dev/sr0 on /media/ddval/ISOIMAGE type iso9660 (ro,nosuid,nodev,relatime,
> nojoliet,check=s,map=n, blocksize=2048,uid=1000,gid=1000,dmode=500,
> fmode=400,uhelper=udisks2)
> $ sudo umount /dev/sr0
> umount: /dev/sr0: not mounted

Does anybody here experience similar stubbornness of automounting ?
If so: How to unmount a DVD without ejecting it ?


Have a nice day :)

Thomas