[winswitch] xpra start & attach error messages

[yonatan zaken]

Hi All,
I have been using xpra lately, extremely cool utility.

My platform: Linux kubuntu 14
xpra version: v1.0.12-r19800

Some issues i've encountered that are worrying me:

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
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
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)
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
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
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
-------------------------------------------------------------------------------------------------------------------------------

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:

-----------------------------------------------------------------------------------------------------------------------

/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.
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.

Do you have any input on these matters?
Your help is highly appreciated.

*Cheers,*
*Yonatan*