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I am trying to follow this Youtube guide and run X applications in a browser. However I got a few errors and I fixed them and now it's down to one. Which is

xpra start --bind-tcp=0.0.0.0:9876 --html=on --start-child=xterm

and I get

Warning: cannot use the system proxy for 'start' subcommand,
 failed to connect to '/run/xpra/system':
 [Errno 2] No such file or directory
(base) ok@ok:~$ Entering daemon mode; any further errors will be reported to:
  /run/user/1003/xpra/S26428.log

So I open the log as suggested and I see 

(EE)
Fatal server error:
(EE)
Invalid argument -logfile with elevated privileges
(EE)
(EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
(EE)
InitException: Xorg did not provide a display number using -displayfd
xpra initialization error:
 Xorg did not provide a display number using -displayfd
2020-01-16 14:40:56,098 closing TCP socket 0.0.0.0:9876^[[0m

which seems to suggest the issue is with X not xpra. But I can't seem to find any info on how to fix this. I found this which suggests I should install dummy driver with

sudo apt-get install xserver-xorg-video-dummy

which I did, and the rest of intructions does not make much sense to me.

I am running Ubuntu 18.04. Can anyone suggest a fix for this?

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1 Answer 1

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1

Warning: cannot use the system proxy for 'start' subcommand,

This is covered in the xpra FAQ, this is harmless and you can ignore it.

which seems to suggest the issue is with X not xpra.

Correct. Xpra is trying to start a virtual framebuffer to run your applications, and for some strange reason, it is failing.

Two things you can try:

  • use the official xpra.org packages, as the downstream Ubuntu ones are known to be badly broken
  • use Xvfb instead of Xdummy, edit /etc/xpra/conf.d/55_server_x11.conf uncomment it and comment out the current one
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  • How do I use the official xpra.org packages. Total Linux noob here. Is there a command I can run?
    – xiaodai
    Jan 17, 2020 at 4:50
  • The second suggestion also doesn't make sense to me. You mean i comment some lines in that file?? I see a comment saying required on Ubuntu where Xorg is broken.
    – xiaodai
    Jan 17, 2020 at 4:52
  • @xiaodai the download link I posted has: "For step by step instructions on setting up these repositories, follow.."
    – totaam
    Jan 17, 2020 at 7:23
  • as for using Xvfb: there are two commented out (starting with "#") examples of "xvfb=" options in that file, plus the one actually used (not commented out). Use the one that looks like "xvfb=Xvfb ...."
    – totaam
    Jan 17, 2020 at 7:24

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