Can't connect to display ":0": b'Authorization required, but no authorization protocol specified

[dacrhu]

Hi,

OS: Fedora 37
Kernel: Linux fedora 6.0.8-300.fc37.x86_64 #1 SMP PREEMPT_DYNAMIC
Window manager: Wayland
Graphics (dual): NVIDIA GeForce RTX™ 3050 Ti Laptop GPU / AMD Radeon™ Graphics

Nagstamon version:
nagstamon.noarch 3.10.1.fedora37-1 @nagstamon

Console out:

[berci@fedora ~]$ nagstamon
QSocketNotifier: Can only be used with threads started with QThread
Traceback (most recent call last):
File "/usr/bin/nagstamon", line 42, in
from Nagstamon.QUI import (APP,
File "/usr/lib/python3.11/site-packages/Nagstamon/QUI/init.py", line 7058, in
statuswindow = StatusWindow()
^^^^^^^^^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/QUI/init.py", line 955, in init
self.ewmh = EWMH()
^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/ewmh.py", line 50, in init
self.display = _display or display.Display()
^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/Xlib/display.py", line 80, in init
self.display = _BaseDisplay(display)
^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/Xlib/display.py", line 62, in init
display.Display.init(*(self, ) + args, **keys)
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/Xlib/protocol/display.py", line 129, in init
raise error.DisplayConnectionError(self.display_name, r.reason)
Xlib.error.DisplayConnectionError: Can't connect to display ":0": b'Authorization required, but no authorization protocol specified\n'

Thank you for help!
David

[HenriWahl]

@dacrhu did it work before? Anything changed like Fedora upgrade from 36 to 37?

[HenriWahl]

A short local fix is installing the package python3-pyqt6. Nagstamon needs this for running on Wayland but apparently the dependency in the RPM-File is still on Qt5 - will fix this ASAP.

[dacrhu]

It worked before, yes. I upgraded to 37, and worked fine. But yesterday I shutted down my notebook, and it runned auto upgrade. In this morning nagstamon not runned again. I think yesterday nagstamon upgraded.

I've installed python3-pyqt6 now but result is same.

[dacrhu]

Sorry, result is little bit different:

Traceback (most recent call last):
File "/usr/bin/nagstamon", line 42, in
from Nagstamon.QUI import (APP,
File "/usr/lib/python3.11/site-packages/Nagstamon/QUI/init.py", line 7058, in
statuswindow = StatusWindow()
^^^^^^^^^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/QUI/init.py", line 955, in init
self.ewmh = EWMH()
^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/ewmh.py", line 50, in init
self.display = _display or display.Display()
^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/Xlib/display.py", line 80, in init
self.display = _BaseDisplay(display)
^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/Xlib/display.py", line 62, in init
display.Display.init(*(self, ) + args, **keys)
File "/usr/lib/python3.11/site-packages/Nagstamon/thirdparty/Xlib/protocol/display.py", line 129, in init
raise error.DisplayConnectionError(self.display_name, r.reason)
Xlib.error.DisplayConnectionError: Can't connect to display ":0": b'Authorization required, but no authorization protocol specified\n'

[HenriWahl]

@dacrhu what happens if you use Xorg instead of Wayland?

[dacrhu]

With Xorg working fine.

[HenriWahl]

Wayland support by Qt got better with Qt6 but there are still issues for Nagstamon, because it partly does not behave like a normally windowed application. This is still under construction.

So if you could use Xorg as well this might be no fix but a workaround. By the way Nagstamon is the only reason why I still use Xorg.

[dacrhu]

Then I'll wait patiently.

[fluffysatoshi]

#880

Fixed the the issue for me. EWMH Hints are not awailable under Wayland.

xdg-shell might be used to get the EWMH functionality under Wayland.

[HenriWahl]

How do you use xdg-shell in this context?