2

I am trying to get xpra running using the Xdummy driver and in following the examples on https://xpra.org/trac/wiki/Xdummy I tried the example there with this command. I suspect that it starts on a separate display because of the :10 at the end because it is not an example with attaches to an exiting xpra display.

Xorg -noreset +extension GLX +extension RANDR +extension RENDER -logfile ./10.log -config ./xorg.conf :10

The first instance resulted in the error /usr/lib/xorg/Xorg.wrap: Only console users are allowed to run the X server which I fixed by changing allowed_users=console to allowed_users=anybody in /etc/X11/Xwrapper.conf.

The second trial resulted in the error: 

Fatal server error:                                              
(EE) parse_vt_settings: Cannot open /dev/tty0 (Permission denied)

Some web searching resulted in the suggestion to add needs_root_rights=yes to /etc/X11/Xwrapper.conf which enabled it to work.

Because the error message stated parse_vt_settings I tried add -novtswitch from the xorg man page (whose meaning I don't understand) to the command invocation but that made no difference. needs_root_rights was required.

Doesn't needs_root_rights=yes create a security risk?

Improve this question
2
  • I believe you should read systutorials.com/docs/linux/man/5-Xwrapper as far I can understand newer Linux versions use wrappers here and there, for security measures. This setting removes that security and if someone could elaborate further on this I also would like to find a better answer to this question. It seems to me Xorg is opened up again on the system which is something linux users are warned for that Xorg is not secure by itself.
    – user978927
    May 17, 2019 at 21:42
  • 1
    to get access to /dev/tty0 add yourself to the tty group. Do NOT go around giving everything root privileges. In general, when you get permission issues, use ls -l to find the group the "file"* belongs to and assign it to yourself. On UNIX, everything is a file ;-).
    – thecarpy
    May 17, 2019 at 22:37

1 Answer 1

Reset to default
1

Yes it does. But you don't need to do that.

You're using the wrong Xorg, on most Ubuntu versions you should be using /usr/lib/xorg/Xorg, Debian and other distros may use a slightly different path. (the one you tried to use is /usr/bin/Xorg which is just a script, which calls another script... and eventually calls the correct Xorg binary)

Improve this answer

You must log in to answer this question.

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