Ubuntu 18.04, DBUS Fix Instructions with Troubleshooting

Ubuntu 18.04, DBUS Fix Instructions with Troubleshooting
After asking if there were updated instructions, and promising to write it up if I could figure it out...https://www.reddit.com/r/bashonubuntuonwindows/comments/9l46br/asking_wsl_ubuntu_1804_dbus_fix_updated/



From a truly clean 18.04.1 install it should be this:

sudo apt install dbus-x11

sudo systemd-machine-id-setup

export DISPLAY=localhost:0

Once the above is set up, then things should "just work". NOT COVERED HERE IS:

You'll need an X Server installed on the Windows side.

Actual install of an X program that needs this DBUS fix.

You'll probably want to set up a nice script that allows you to start your favorite X terminal from a shortcut.



Some troubleshooting:

Is dbus and dbus-x11 installed?

blackbird:~$ apt list dbus dbus-x11

Listing... Done

dbus/bionic,now 1.12.2-1ubuntu1 amd64 [installed]

dbus-x11/bionic,now 1.12.2-1ubuntu1 amd64 [installed]

blackbird:~$

If either is not installed, install: sudo apt install dbus-x11

Note: dbus-x11 requires dbus, so apt will figure them both out.

Is dbus running? sudo service dbus status

If it is not running, try starting it: sudo service dbus start

Older instructions (for previous iterations of Windows 10 and Ubuntu) required the dbus listen directive to point to tcp:host=localhost..., and that no longer works. If you have some old change to that around (/etc/dbus-1/session.conf or /usr/share/dbus-1/session.conf), it should be set-back to default <listen>unix:tmpdir=/tmp</listen>.

Does dbus have a valid /etc/machine-id?

blackbird:~$ dbus-uuidgen --ensure=/etc/machine-id

blackbird:~$ echo $?

0

blackbird:~$

If not (an error comes up), create one: sudo systemd-machine-id-setup

Check the output of dbus-uuidgen again.

Is DISPLAY set? export DISPLAY=localhost:0 works for me.

Check on dbus again (as above).

I didn't need to, but some instructions suggest setting export LIBGL_ALWAYS_INDIRECT=1

I suspect the above may be needed for some things that try to do 3D graphics.