I've gotten Xpra to work with Xdummy on lubuntu 16.04 by by starting
Xpra on a virtual console. This may not support your use case but it
works for mine.
INSTALLATION
sudo apt-get install xpra
apt list xpra
xpra/xenial,now 0.15.8+dfsg-1 amd64 [installed]
sudo usermod -aG tty <USERNAME>
USE FROM DESKTOP
Workaround for 16.04 issues. Start xpra on a /dev/tty
ll /dev/tty63
crw-r----- 1 root tty 4, 63 Jul 15 17:34 /dev/tty63
#group needs rw access to openvt tty
sudo chmod 660 /dev/tty63
ll /dev/tty63
crw-rw---- 1 root tty 4, 63 Jul 15 17:34 /dev/tty63
openvt -c 63 -f -- xpra start :80 --daemon=no
START WITH BOOT
[Unit]
Description=Xpra server
[Service]
Type=simple
Environment=TTYNum=63 DISPLAY=:90
#openvt will execute as root so requires no permission change on /dev/tty##
#then sudo to user running xpra
ExecStart=/bin/openvt -c $TTYNum -f -v -w -- /usr/bin/sudo --user <USERNAME>
--login /usr/bin/xpra start $DISPLAY --daemon=no
ExecStop=/usr/bin/sudo --user <USERNAME> --login /usr/bin/xpra stop
$DISPLAY
[Install]
WantedBy=graphical.target
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-dummy in Ubuntu.
https://bugs.launchpad.net/bugs/1589447
Title:
Xdummy cannot be used in Xenial
Status in xserver-xorg-video-dummy package in Ubuntu:
Confirmed
Bug description:
Xdummy is used by several systems for remote display, such as xpra
(http://xpra.org/).
Unfortunately, since Xenial, it is completely impossible to use Xdummy
for anything like that, because of the way in which permissions are
set up for running X servers. This results in a serious compromise on
the possibility of running remote displays systems on ubuntu. In fact,
the latter can only rely on Xvfb with a less than optimal experience.
Most important,
Trying to run Xdummy from a console session results in
/usr/lib/xorg/Xorg.wrap: Only console users are allowed to run the X
server
It should be possible to start Xdummy from an ssh session. Xdummy is a
'dummy' display driver. It does not touch real hardware. There is no
need to prevent users who are not on the console from starting it. In
fact, it is not clear what is the purpose of taking the effort of
packaging and shipping Xdummy at all, if it cannot be used for the
tasks it is intended for.
See also:
http://xpra.org/trac/ticket/1220
The Xpra developer, whose availability to help is always excellent,
explicitly states that:
- it is not possible to use xdummy with almost all Ubuntu releases [in
fact the problem is Xenial. Before xenial, xdummy required some
tweaks, but worked]
- xpra needs to be compiled with the --without-Xdummy on Ubuntu
because of this
- There is nothing that can be done in xpra, because this is an OS
permission problem
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-dummy 1:0.3.7-1build5
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Jun 6 11:54:50 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-12-12 (906 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
SourcePackage: xserver-xorg-video-dummy
UpgradeStatus: Upgraded to xenial on 2016-04-21 (45 days ago)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-dummy/+bug/1589447/+subscriptions
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