xpra shadow does not start

[stdedos]

At this point, I just want xpra to tell me session :0 is alive:

ure-q@pc-q:~$ ls -lah /run/xpra/
total 0
drwxrwxr-x  2 root xpra   60 Nov 19 14:43 .
drwxr-xr-x 34 root root 1.2K Nov 19 14:52 ..
srw-rw-rw-  1 root xpra    0 Nov 19 14:43 system
ure-q@pc-q:~$ xpra list
No xpra sessions found
ure-q@pc-q:~$ xpra shadow --attach=no :0
ure-q@pc-q:~$ Entering daemon mode; any further errors will be reported to:
  /run/user/1000/xpra/display-:0-20201119-150410.log

ure-q@pc-q:~$ xpra list
No xpra sessions found
ure-q@pc-q:~$ cat /run/user/1000/xpra/display-\:0-20201119-150410.log 
2020-11-19 15:04:10,331 cannot create group socket '/run/xpra/pc-q-0'
2020-11-19 15:04:10,332  [Errno 13] Permission denied
2020-11-19 15:04:10,626 serving html content from '/usr/share/xpra/www'
2020-11-19 15:04:10,813 Warning: no local sockets defined,
2020-11-19 15:04:10,813  disabling printer forwarding
2020-11-19 15:04:10,936 notification forwarding is not available
2020-11-19 15:04:11,058 Warning: cannot watch for application menu changes without pyinotify:
2020-11-19 15:04:11,058  No module named 'pyinotify'
2020-11-19 15:04:11,179 clipboard CLIPBOARD rejecting request for invalid target 'x-special/gnome-copied-files'
2020-11-19 15:04:11,179  coming from 'nautilus-desktop'
2020-11-19 15:04:11,198 clipboard CLIPBOARD rejecting request for invalid target 'x-special/gnome-copied-files'
2020-11-19 15:04:11,198  coming from 'nautilus-desktop'
2020-11-19 15:04:11,203 xpra is ready.
2020-11-19 15:04:11,211 xpra GTK3 shadow version 4.1-r27756 64-bit
2020-11-19 15:04:11,224 vpx: vp9 encoding failed: failed to instantiate vp9 encoder with ABI version 14: Invalid parameter
2020-11-19 15:04:11,389  uid=1000 (ure-q), gid=1000 (ure-q)
2020-11-19 15:04:11,390  running with pid 5077 on Linux Ubuntu 18.04 bionic
2020-11-19 15:04:11,392  on display ':0' of size 1920x1080
2020-11-19 15:04:11,543 7.7GB of system memory
2020-11-19 15:04:12,682 Warning: remote clipboard request timed out
2020-11-19 15:04:12,684  request id 0, selection=CLIPBOARD, target=TARGETS
2020-11-19 15:04:12,741 OpenGL is supported on display ':0'
2020-11-19 15:04:12,742  using 'Mesa DRI Intel(R) HD Graphics 4000 (IVB GT2)' renderer
2020-11-19 15:04:13,128 loaded 80 start menu entries from 10 sub-menus
2020-11-19 15:04:13,128 Warning: found 1 large icon:
2020-11-19 15:04:13,128  '/usr/share/pixmaps/com.visualstudio.code.png' (215 KB)
2020-11-19 15:04:13,128  more bandwidth will used by the start menu data

It dies and I don't know why.

[Antoine Martin]

Warning: no local sockets defined

Without sockets, xpra list cannot find anything.

Solutions in ticket:2945#comment:2

[stdedos]

So ... has the session started or not?

If it didn't, I expect the sockets error to be fatal.

[stdedos]

"There must have been XDG_RUNTIME_DIR available", but I cannot guarantee that (I did this just before a restart).

Also, I added myself to the xpra group too just in case