[winswitch] xpra launcher: connectionn fails with no message

[Eric Levy]

Thanks for the suggestions. See my comments, below, please.

On Wed, 2021-12-15 at 20:15 +0700, Antoine Martin via shifter-users
wrote:

> There have been a number of bugs reported recently with ssh
> connections:
> https://github.com/Xpra-org/xpra/issues/3383
> https://github.com/Xpra-org/xpra/issues/3372
> https://github.com/Xpra-org/xpra/issues/3330
> https://github.com/Xpra-org/xpra/issues/3295

The original report for #3383 was given by me. Presently, I force use
of the external command for SSH as a workaround. This solution resolves
the problem, as evidenced by my success when invoking from the command
line. The problem I am describing now seems to me not part of the issue
reported in #3383.

Issue #3295 is in regard to an attempt to connect without a password,
and as such, is also not closely related. I am using password
authentication, and I have tried enough times that to be clear that a
wrong password is not the problem.

Issue #3300 too seems a poor match. It was reported under Windows, and
shows a dialog box with a message about failed authentication. It is
also has been reported resolved in the version that I have tested,
without success. Issue #3372 is reported a duplicate.

> Try:
> xpra launcher --debug ssh
> The command output will include all ssh connection messages.
> (I assume that you're using ssh to connect - please include the
> command 
> lines if that is not the case)
> 

The verbose output seems to show nothing rather helpful (see below). I
checked the values for protocol, username, and password. As I
indicated, of course, I have been successful using the same values in
an invocation through command line.

---

$ xpra_launcher --debug ssh
Gtk-Message: 09:14:00.221: Failed to load module "appmenu-gtk-module"
2021-12-15 09:14:15,840 Xpra GTK3 client version 4.3-r30655 (g1e8a46dce) 64-bit
Gtk-Message: 09:14:15.926: Failed to load module "appmenu-gtk-module"
2021-12-15 09:14:15,997  running on Linux Linuxmint 20.2 uma
2021-12-15 09:14:16,004  window manager is 'Mutter (Muffin)'
Gtk-Message: 09:14:16.744: Failed to load module "appmenu-gtk-module"
2021-12-15 09:14:16,791 GStreamer version 1.16.2 for Python 3.8.10 64-bit
2021-12-15 09:14:16,871 created unix domain socket '/run/user/1000/xpra/clients/clientname-882690'
2021-12-15 09:14:16,930 No OpenGL_accelerate module loaded: No module named 'OpenGL_accelerate'
2021-12-15 09:14:17,077 Warning: vendor 'Intel' is greylisted,
2021-12-15 09:14:17,077  you may want to turn off OpenGL if you encounter bugs
2021-12-15 09:14:17,157 OpenGL enabled with Mesa Intel(R) Iris(R) Plus Graphics (ICL GT2)
2021-12-15 09:14:17,244 Warning: vendor 'Intel' is greylisted,
2021-12-15 09:14:17,244  you may want to turn off OpenGL if you encounter bugs
2021-12-15 09:14:17,245 OpenGL enabled with Mesa Intel(R) Iris(R) Plus Graphics (ICL GT2)
xpra initialization error:
 cannot find any live servers to connect to
2021-12-15 09:14:17,500 Error: failed to receive anything, not an xpra server?
2021-12-15 09:14:17,501   could also be the wrong protocol, username, password or port
2021-12-15 09:14:17,501   or the session was not found
2021-12-15 09:14:17,513 removing unix domain socket '/run/user/1000/xpra/clients/clientname-882690'