Comment # 1 on bug 930295 from Guido Berhoerster

(In reply to Vedran Vucic from comment #0)
> I inserted USB card reader with 2 volumes and it was not displayed on xfce
> desktop although the system does see them as /dev/sdb.

What do you mean by "xfce desktop", literally the desktop, i.e. xfdesktop which
by default displays an icon to mount/unmount removable media on the desktop. Or
Thunar the file manager which by default displays removable volumes in the
sidebar? Are both consistently not showing the volumes?

> I unplugged USB card reader and plugged in external USB HD with one volume.
> It is displaye dproperly and interestingly it displayed the existing volumes
> on HD.  I tried to eject them but it was not successfull.

Any error messages in the form of a notification or in
~/.xsession-errors-$DISPLAY? Does unmount instead of eject work?

> After that I unpluged external USB HD with one volume and plugged in again
> USB card reader which displayed properly volumes in USB card reader. please
> advise. I am willing to help and submit outputs of required commands.
> Please chek here http://sprunge.us/bWJa
> output of the command:
>  a: ls -l /dev/* | curl -F 'sprunge=<-' http://sprunge.us
> thanks

Please run the following commands *before* plugging in the card reader, each in
a separate terminal emulator or tab:

sudo journalctl -af
tail -f ~/.xsession-errors-$DISPLAY
udisksctl monitor
sudo udevadm monitor --udev --property
gvfs-mount --monitor --detail

Then plug in the cardreader, wait a few seconds, and attach the output
generated by each command to this bug.

While the cardreader is still plugged in run the following command:

hwinfo > hwinfo.txt

and attach hwinfo.txt here.