I run Debian 9 with LXQt what is completely fine. However, attached USB-volumes are not getting displayed in the PCManFM-Qt sidebar in category Devices intended for that (see screenshot).

Which package is responsible for that?

I activated all three necessary options in Preferences -> Volume, but the drives still don't appear in the sidebar. Ironically the taskbar-widget shows the drives and I can easily open them in PCManFM-Qt by clicking on the widget. However they are never displayed in the sidebar while the category Devices remains completely empty. During common workflows that is a bit uncomfortable...

Screenshot of the issue:

Empty "Devices" category when USB-device is plugged in

Screenshot of the working taskbar widget:

Working taskbar widget that opens the displayed device in <code>PCManFM-Qt</code> correctly

Again, clicking on the taskbar widget the device gets opened in PCManFM-Qt without any problems. Only displaying its existence in the sidebar does not work.

  • Have to tried with terminal?
    – Siva
    Commented May 16, 2018 at 13:23
  • @SivaPrasath: Excuse me, I don't understand what you mean. How can I try it in terminal?
    – Dave
    Commented May 16, 2018 at 14:10

2 Answers 2


Merely the package gvfs-backends was missing. This package is responsible for virtual filesystems in userspace.

After installation everything works fine!


Getting usb devices to show up in thunar is messy but here is the process no matter your system configuration:

  1. Dbus and Xdg stuff must be installed.
  2. XDG_SESSION_TYPE=x11 dbus-run-session openbox-session or gnome-session (you run that in tty or put in xinitrc + startx) This loads your display environment. If you have a login or display manager, it takes care of this step. It is insufficient to run openbox-session since Xdg and dbus are needed as well. 3 things run in that command. Session type can be Wayland if compositor supports Wayland. Openbox does not.
  3. Thunar, thunar-volman and udevil must be installed computer restarted.
  4. Udevil daemon thus ( udevil &) must run for a few seconds then good to launch thunar, volume management should be enabled; restart thunar if you just enabled.

Zero need for Gvfs. You can replace udevil with bloated Gvfs if you want. Also better to thunar --daemon on startup.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .