I'd recommend adding
export QT_QPA_PLATFORM=wayland
to your
$HOME/.bash_profile
file or your
$HOME/.bashrc
file - if you feel comfortable editing files on Linux.
I prefer the .bashrc since this were I place all my exports and group
them all together.
However, the .bashrc isn't as tolerant to errors as the .bash_profile file.
In either case make a backup of the file before you edit the file.
You can check the results after you login again by typing
echo $QT_QPA_PLATFORM
-- Cinaed
On 11/28/22 13:05, Jose Ruvalcaba wrote:
HI Cinaed and Jeff,
Sorry for the late reply. I checked if I had the qt-6 wayland and
xwayland installed. Turns out I didn't have the qt6-wayland installed
so I installed it. The issue still remained so I disabled wayland and
it seemed to work. Just like what you guys saw, I stopped seeing the
issue on my flowgraph.
However, I attempted another flowgraph that used QT GUI Label and the
issue came back. I have added the new flowgraph I created along with
its generated code.
I am working from a WIndows machine that has a Virtual Machine with
Ubuntu 22.04. One quick question though: Where would I set the export
QT_QPA_PLATFORM
Thanks,
Jose Ruvalcaba
On Thu, Nov 24, 2022 at 5:25 PM Cinaed Simson
<cinaed.sim...@gmail.com> wrote:
Hi Jose - I can run your script for hours without any issues on
both GR 3.8 and 3.10.
Have you tried setting
export QT_QPA_PLATFORM=wayland
as indicated in the first error message - to see if the script
runs longer then 10 minutes?
My guess is if you eliminate the first exception the other
exceptions will disappear.
Are you working from the console of a linux machine - or are you
working from the console of a Windows machine - and then
connecting to the a Linux machine by some method?
-- Cinaed
On Tue, Nov 22, 2022 at 10:23 PM Jose Ruvalcaba
<joruv...@gmail.com> wrote:
Hello,
I've been noticing an issue popping out everytime I stop
running my flowgraph and I was wondering if someone had some
insight on it. I have a flowgraph where a signal source is
connected to a probe signal block. This block is constantly
updating values and are being displayed using the QT GUI
Label block. However, after running my flowgraph for about 10
minutes I get the following error:
*/Executing: /usr/bin/python3 -u
/home/spacerfvm/Documents/GNURadio_3.10_flowgraphs/func_probe_test.py/*
*/
/*
*/Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use
QT_QPA_PLATFORM=wayland to run on Wayland anyway./*
*/Exception in thread Thread-1 (_amp_probe):/*
*/Traceback (most recent call last):/*
*/ File
"/home/spacerfvm/Documents/GNURadio_3.10_flowgraphs/func_probe_test.py",
line 150, in _amp_probe/*
*/self.doc.add_next_tick_callback(functools.partial(self.set_amp,val))/*
*/ File
"/usr/lib/python3/dist-packages/gnuradio/gr/hier_block2.py",
line 88, in __getattr__/*
*/return getattr(self._impl, name)/*
*/AttributeError: 'gnuradio.gr.gr_python.top_block_pb' object
has no attribute 'doc'/*
*/
/*
*/During handling of the above exception, another exception
occurred:/*
*/
/*
*/Traceback (most recent call last):/*
*/ File "/usr/lib/python3.10/threading.py", line 1016, in
_bootstrap_inner/*
*/self.run()/*
*/ File "/usr/lib/python3.10/threading.py", line 953, in run/*
*/self._target(*self._args, **self._kwargs)/*
*/ File
"/home/spacerfvm/Documents/GNURadio_3.10_flowgraphs/func_probe_test.py",
line 152, in _amp_probe/*
*/self.set_amp(val)/*
*/ File
"/home/spacerfvm/Documents/GNURadio_3.10_flowgraphs/func_probe_test.py",
line 182, in set_amp/*
*/self.set_variable_qtgui_label_0(self.amp)/*
*/ File
"/home/spacerfvm/Documents/GNURadio_3.10_flowgraphs/func_probe_test.py",
line 189, in set_variable_qtgui_label_0/*
*/Qt.QMetaObject.invokeMethod(self._variable_qtgui_label_0_label,
"setText", Qt.Q_ARG("QString",
str(self._variable_qtgui_label_0_formatter(self.variable_qtgui_label_0))))/*
*/RuntimeError: wrapped C/C++ object of type QLabel has been
deleted/*
*//*
It seems that my issue is related to the QT GUI Label block
because when I remove it and add say QT GUI Number sink, this
issue doesn't appear.
Has anyone experienced this issue? If so, would anyone be
able to steer me in the direction to fix it? I am currently
running on Ubuntu 22.04 and am running GNU RADIO 3.10.1.1
which I installed using sudo apt-get install. I've also
attached the flowgraph I am talking about.
Thanks,
Jose Ruvalcaba
