[winswitch] xpra start & attach error messages

[Antoine Martin]

On 09/02/2021 04:51, yonatan zaken via shifter-users wrote:
> Hi All,
> I have been using xpra lately, extremely cool utility.
> 
> My platform: Linux kubuntu 14
> xpra version: v1.0.12-r19800
Wow, that's old!

This distribution has reached "End of Standard Support" 2 years ago, so
you should upgrade to something that is supported and most of your
warnings will just go away too.

> Some issues i've encountered that are worrying me:
Nothing to worry about here.
I would worry about running an outdated distribution instead.

> 1) After *successfully* performing 'xpra start' or 'xpra attach' I see some
> error messages printed to console. Since most of the functionalities are
> working fine I can't tell whether these errors are critical or not. This is
> the console output after using 'xpra attach':
> 
> -------------------------------------------------------------------------------------------------------
> *yonat at y10*:~>xpra attach
> 2021-02-08 21:08:06,709 Xpra gtk2 client version 1.0.12-r19800 64-bit
> 2021-02-08 21:08:06,710  running on Linux Ubuntu 14.04 trusty

> Warning: failed to import GStreamer:
>  GStreamer 1.0: Namespace Gst not available
>  GStreamer 0.10: No module named pygst
> 2021-02-08 21:08:07,675 Error: failed to query sound subsystem:
> 2021-02-08 21:08:07,676  query did not return any data
You won't get any audio forwarding because of these missing packages.
I really cannot remember if it is possible to install them on Ubuntu 14.

> 2021-02-08 21:08:07,714 Warning: libvpx ABI version 5 is too old:
> 2021-02-08 21:08:07,715  disabling YUV444P support with VP9
Your distribution is too old and the "vp9" encoder will be forced to use
colour subsampling. No big deal.

> 2021-02-08 21:08:08,604 Warning: PyOpenGL version 3.1 or later is strongly
> recommended
> 2021-02-08 21:08:08,604  (found version 3.0.2)
Same: these libraries are just old, and in this particular case, buggy too.

> 2021-02-08 21:08:08,627 PyOpenGL warning: missing accelerate module
> 2021-02-08 21:08:08,628 PyOpenGL warning: missing array format handlers:
> numeric, vbo, vbooffset
> 2021-02-08 21:08:08,628 OpenGL Version: 4.5.0 NVIDIA 367.44
> 2021-02-08 21:08:08,651 OpenGL enabled with GeForce GT 730/PCIe/SSE2
So, if your client crashes, you may want to turn off opengl with --opengl=no

> 2021-02-08 21:08:08,726  keyboard settings: rules=evdev, model=pc105,
> layout=us
> 2021-02-08 21:08:08,728  desktop size is 1920x1080 with 1 screen:
> 2021-02-08 21:08:08,728   :0.0 (513x292 mm - DPI: 95x93) workarea: 1920x1045
> 2021-02-08 21:08:08,728     VGA-0 (509x286 mm - DPI: 95x95)
> 2021-02-08 21:08:10,537 enabled fast mmap transfers using 256MB shared
> memory area
> 2021-02-08 21:08:10,538 Xpra X11 server version 1.0.12-r19800 64-bit
> 2021-02-08 21:08:10,538  running on Linux Ubuntu 14.04 trusty
> 2021-02-08 21:08:10,538 enabled remote logging
> 2021-02-08 21:08:10,544 Attached to :1 (press Control-C to detach)
> 
> 2021-02-08 21:08:11,574 failed to send logging packet: global name 'enc' is
> not defined
This is a minor harmless bug, which has now been fixed:
https://github.com/Xpra-org/xpra/commit/83a6b3f8186776fc670a0055faea19c56c840596

> 2021-02-08 21:08:11,575 do_send_printers()
> Traceback (most recent call last):
>   File "/usr/lib/python2.7/dist-packages/xpra/client/client_base.py", line
> 753, in do_send_printers
>     printers = get_printers()
>   File "/usr/lib/python2.7/dist-packages/xpra/platform/pycups_printing.py",
> line 396, in get_printers
>     all_printers = get_all_printers()
>   File "/usr/lib/python2.7/dist-packages/xpra/platform/pycups_printing.py",
> line 400, in get_all_printers
>     conn = cups.Connection()
> RuntimeError: failed to connect to server
Your cupsd printer deamon is not running, so printer forwarding will not
work.

> -------------------------------------------------------------------------------------------------------------------------------
> 
> 2) I have a GUI application that embeds a attached xpra session. When I
> close the GUI application I am getting the following output - keep in mind
> i don't detach from the xpra session that's embedded in the gui application:
How exactly do you embed the xpra session?
With most applications, xpra normally creates multiple windows (ie: each
drop down menu or tooltip is in fact a window) so it should be very
difficult to embed correctly.

> -----------------------------------------------------------------------------------------------------------------------
> 
> /usr/lib/python2.7/dist-packages/xpra/gtk_common/gtk_util.py:383:
> GtkWarning: GdkWindow 0x4a0007f unexpectedly destroyed
>   gtk.main()
> /usr/lib/python2.7/dist-packages/xpra/gtk_common/gtk_util.py:383:
> GtkWarning: GdkWindow 0x4e000b3 unexpectedly destroyed
>   gtk.main()
> /usr/lib/python2.7/dist-packages/xpra/gtk_common/gtk_util.py:383:
> GtkWarning: GdkWindow 0x4a0007c unexpectedly destroyed
>   gtk.main()
> /usr/lib/python2.7/dist-packages/xpra/gtk_common/gtk_util.py:383:
> GtkWarning: GdkWindow 0x4e000b0 unexpectedly destroyed
>   gtk.main()
> 
> 2021-02-08 22:58:18,276 Error: OpenGL backing is not realized
> 2021-02-08 22:58:18,653 Error: OpenGL backing is not realized
> 2021-02-08 22:58:19,028 Error: OpenGL backing is not realized
> 2021-02-08 22:58:19,404 Error: OpenGL backing is not realized
> 2021-02-08 22:58:19,780 Error: OpenGL backing is not realized
> 2021-02-08 22:58:20,157 Error: OpenGL backing is not realized
> 2021-02-08 22:58:20,534 Error: OpenGL backing is not realized
> 2021-02-08 22:58:20,909 Error: OpenGL backing is not realized
> 2021-02-08 22:58:21,285 Error: OpenGL backing is not realized
> 2021-02-08 22:58:21,653 Error: OpenGL backing is not realized
> 2021-02-08 22:58:22,022 Error: OpenGL backing is not realized
> 2021-02-08 22:58:22,389 Error: OpenGL backing is not realized
> 2021-02-08 22:58:22,756 Error: OpenGL backing is not realized
> 2021-02-08 22:58:23,123 Error: OpenGL backing is not realized
> 2021-02-08 22:58:23,492 Error: OpenGL backing is not realized
> 2021-02-08 22:58:23,859 Error: OpenGL backing is not realized
> 
> ---------------------------------------------------------------------------------------------------------------------------
> 
> The Error: OpenGL backing is not realized, as you see, keeps being sent to
> console and stops only if I run the command 'xpra stop' and shutdown the
> server.
This message comes from the client, which means that the client is still
connected to the server at this point.
For some reason, one of its window seems to be in an invalid state.
Probably something to do with your embedding.

> Also, I have been performing the mentioned operation (closing gui that
> embeds attached xpra session) for quite a while but only today I am seing
> the "OpenGL backing is not realized" message. Very unusual.
It could be another update that has caused the behaviour to change,
maybe a driver update?

> Do you have any input on these matters?
> Your help is highly appreciated.
Please use a more up to date version and share your embedding code.
Without it, it is impossible for me to diagnose anything.

Cheers,
Antoine


> 
> *Cheers,*
> *Yonatan*