Questions tagged [qt]
Qt is an application framework originally created by Trolltech and currently managed by Digia. The KDE desktop uses the Qt framework for its applications.
784
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System permanent freeze via running Qt5 QML + .mesh project on Ubuntu 22.04
I'm trying to launch Qt5 project with QML UI with .mesh 3D objects.
This project works normally on old, grand-daddy's laptop Asus X555D, with Radeon R6 M340DX 2GB graphics, 8GB RAM and AMD A10 6th gen....
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1
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284
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cmake: error while loading shared libraries: libidn.so.11: cannot open shared object file: No such file or directory
I'm trying to build the qt-gstreamer-1.2.0 package listed here. But when I run cmake .. -DCMAKE_INSTALL_PREFIX=/path/to/installation/ according to the README file I encounter the cmake: error while ...
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1
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1
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13
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Why is "sip" missing when I run bzr?
When I run a bzr command such as:
bzr config launchpad_username
I get a strange error message:
Unable to load plugin 'qbrz' from '/usr/lib/python3/dist-packages/breezy/plugins/qbrz': No module named '...
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1
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35
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Rescale a QT app to fit a smaller screen
I have to use a QT app developed by a third party. Unfortunately, it does not fit the screen(s) of the computer that I use (with Ubuntu 22). I cannot access all the features of this app simply because ...
- 131
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How do I install Qt6 QtWebEngineProcess in Ubuntu 22.04?
I installed the following packages: qt6-base-dev, qt6-webengine-dev and libqt6webenginecore6. But my application still returns an error: "Could not find QtWebEngineProcess". I can only find /...
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ns3 please I have a qst about the instalation of ns3 I had this erreur , and I dont know how I can
youx@youx:~$ sudo apt install build-essential autoconf automake libxmu-dev python-pygraphviz cvs mercurial bzr git cmake p7zip-full python-matplotlib python-tk python-dev python-kiwi python-gnome2 ...
3
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1
answer
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Ubuntu 22.04 with Qt6 - qmake: could not find a Qt installation of ''
In Ubuntu 22.04 after installing Qt6 using
sudo apt install qt6-base-dev
calling qmake results in an error message:
qmake: could not find a Qt installation of ''
It is however possible to call/run ...
- 326
0
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0
answers
29
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ParaFoam error when running cavity case
I'm trying to run the cavity case in openfoam in ubuntu but I keep getting the following error.
Created temporary 'cavity.OpenFOAM'
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not ...
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0
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21
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When opening Git Giu on Ubuntu 22.04 Virtual Box the screen does not show the graphics correctly
When opening Git Giu on Ubuntu 22.04 Virtual Box the screen does not show the graphics correctly.
I have recently used the same functionality a couple days ago and I had no problem with it. I really ...
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47
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Is it possible to cross-compile among different Ubuntu relases?
Real case scenario: I have a dev machine that runs Ubuntu 22.04. Most of my customers have a dedicated remote machine that run Ubuntu as well, but with different releases - 20.04, 21.04, etc...
I ...
- 447
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0
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33
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Hard reboot corrupted/removed my Qt library. Couldn't run GUI apps
A little over a week ago I had an issue. My monitor didn't detect my system (Ubuntu 22.04), so I did a hard restart. Unfortunately this caused a problem:
Konsole terminal closes immediately because it ...
- 163
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1
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120
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Which packages install Qt5 pkg-config files?
I need Qt5 .pc pkg-config file in order to compile this application.
Of course I can install the whole Qt5 dev environment using the official Qt online installer.
But I wonder if I can install some ...
- 447
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0
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82
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Konsole terminal closes immediately because it cannot locate system icons
I have Konsole (terminal) version 21.12.3 installed on Ubuntu 22.04 from the Software Centre.
My monitor didn't detect the signal, so I had to do a forced restart.
After restarting, Konsole had much ...
- 163
0
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1
answer
93
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Mouse cursor not changing on hover in Qt Apps (22.04)
Usually, the mouse cursor adapts to whatever it's hovering over. However, for maybe one or two weeks now (probably since some update), this will sometimes spontaneously stop working in Qt apps until I ...
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1
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114
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Can't upgrade from ubuntu 20.04 to 22.04
Im trying to upgrade from Ubuntu 20.04 to 22.04, but the upgrade process stopped at the 'Installing the upgrades' step.
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50
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Ubuntu 22.04 qt5 mouse problem
I’m having a problem with using my mouse on qt5 apps. For example, I tried to run Zoom, but the mouse pointer doesn’t allow me to select anything. When I press the mouse button, instead of selecting ...
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0
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299
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Cannot mix incompatible Qt library (5.15.3) with this library (5.15.2) - Ubuntu 22.04
Trying to run Nsight Compute 2022.4.0.15 gui using ncu-ui but get this error.
$ ncu-ui
Cannot mix incompatible Qt library (5.15.3) with this library (5.15.2)
I think these were the libraries that ...
- 135
0
votes
1
answer
191
views
Tiled map editor not launching
I installed Tiled map editor as a snap application from the software store but when I click on it in the app grid, it does not launch.
When I tried launching via the terminal I get this error:
$ ...
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0
answers
289
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Installing an older version of QT
I am using Ubuntu 20.04 x64 desktop. I installed qt using the command sudo apt-get install qt5-default. All went well except I need QT 5.9.5. I see under the build and run tab the following
QT 5.12.8 ...
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0
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584
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Since ubuntu 22.04, anaconda-navigator launching errors : warning linux-scaling, Ignoring XDG_SESSION_TYPE, libGL error
Here is my problem : I use jupyterlab across anaconda navigator. Everything was fine on Ubuntu 18 LTS. Since I updated Ubuntu 18 LTS to 22.04 LTS when I run anaconda-navigator in a terminal the ...
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0
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390
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Too many kde-frameworks-5-qt-x-y-z-core20 folders in /snap directory
On my Ubuntu machine, I have KDE and Gnome, right now I only use the latter.
My /snap directory contains a number of packages with names like kde-frameworks-5-qt-x-y-z-core20, each over 1 GB. There is ...
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1
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255
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Problem with QNetwork request - Error creating SSL context
I have an application which has a feature to display an overlay on a Google Maps display. In order to display a map overlay, my application has a dialog which downloads an xml file describing the map. ...
0
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1
answer
1k
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qmake- No Such File or Directory after Installing QT5
OS: Ubuntu 22.04.1
KDE Plasma: 5.24.6
KDE Frameworks: 5.92.0
QT: 5.15.3
I installed QT5 from their website. Downloaded the installer and ran it. It installed QT in my Home directory and the qmake ...
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1
vote
1
answer
6k
views
Install qt6 on 22.04
I am trying to install qt6 on Ubuntu 22.04. I have found this answer -> How to install Qt6 on Ubuntu 21.10 where it states that package qt6-base-dev is available on 22.04.
However, I get Unable to ...
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0
answers
217
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Cool Retro Term not displaying
I'm trying to start up cool retro term, and am running into an issue. When I run it using "cool-retro-term" in the terminal, the new window pops up, but it's see-through, as in you can see ...
2
votes
1
answer
3k
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WSL2 on Windows 11 (Ubuntu 20.04): cannot run Qt apps, "could not connect to display: :0", xcb module found but not loaded
Qt apps work from Terminal-hosted WSL, but not from window WSL.
I am trying to run a Qt app, such as xeyes, on WSL2 with Ubuntu 20.04, on Windows 11. When I launch it (xeyes, or Wireshark, or Qt-made ...
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417
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WSL2 seems to change network configuration or DISPLAY variable on start-up. Where can I see what happens?
I'm using WSL2 with Ubuntu 20.04, and I have a problem trying to run Qt apps, currently discussed in this question. The gist of it is that Qt calls a plugin, xcb, that tries to connect to a display. ...
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0
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99
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How to Install qtvirtualkeyboard-plugin apt package for Ubuntu 22.04
I'm trying to install qtvirtualkeyboard-plugin via apt on Ubuntu Server 22.04 on a Raspberry Pi. Installation succeeds, but I encounter runtime errors (gdb trace linked below).
I tried building the ...
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59
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Ubuntu 22.04: Problems with screen reader compatibility with Python and Qt
VirtualBox 6.1.36.
Ubuntu 22.04
Python 3.10.4
It doesn't matter if I use Pyqt6 or PySide6, the following misbehavior is always the same.
I start the screen reader Orca. Then I start the Python Qt ...
0
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1
answer
417
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Qt creator text editor malfunction under Ubuntu 22.04
I've upgraded my Ubuntu from 20.04 to 22.04 today (clean install) and went through the motions of setting up my development environment. (apt install build-essential libxcb-xinerama0, setting up for ...
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0
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122
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PCManFM-QT, Dolphin, FTP, and upload/overwrite prompts
In the previous version of ubuntu, PCManFM-QT would not prompt to upload/overwrite remote files when editing in VSCode using PCManFM-QT as my FTP client. I've updated to Ubuntu Studio 22.04 LTS, and ...
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0
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260
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How correctly to compile Qt5 to arm64 on Ubuntu 22.04?
Host: Ubuntu 20.04 x64
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 43 bits ...
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146
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Deployment based on Qt 5.12.8 of ubuntu20.04 will cause problems~
Deployment based on Qt 5.12.8 of ubuntu20.04 will cause problems.
If you look at the ldd test dependency, libQt5xxx references rpath correctly where you specify it
Some libQt5Network.so.5 refer to /...
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0
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1
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405
views
Fix font size for high-resolution screen
I have a high-resolution monitor. The font and cursor are too small for various applications. As you can see in the screenshot the font for PGAdmin is much smaller than VS code and Chrome. I thought ...
- 111
0
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1
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1k
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How do you resolve: PySide2/designer: symbol lookup error: ... : undefined symbol: _ZdlPvm, version Qt_5?
On Ubuntu 22.04, using Python 3.10.4, I've setup PyCharm community edition 2022.01 to use PySide2 designer (Qt) as an external tool. When I press the "create" button this error is produced ...
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0
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205
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Installing the fcitx5-frontend-qt5 package
I am trying to install the fcitx5-frontend-qt5 package so that I can use it on qt applications. Unfortunately, this error comes up every time:
Reading package lists... Done
Building dependency tree ...
0
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0
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38
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apt-get cannot install qt5-default in Ubuntu virtual box installation [duplicate]
I'm using Ubuntu 22.04 LTS running through a Virtual Box on a Windows 10 machine.
For my project, I need to install qt5-default, so I run the following command:
sudo apt-get install qt5-default
...
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1
answer
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downgrade spyder
I have just upgraded ubuntu. As a result, spyder is not working anymore. This the error:
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
...
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2
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Qt5 install problem ubuntustudio 22.04
The short version of the question: where is qt5 installed on Ubuntu Studio 22.04?
The long version of the question can be seen unanswered here on the SuperCollider forums: essentially I am trying to ...
0
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1
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728
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How to fix weird icons in pcmanfm-qt on Ubuntu 22.04?
I made a fresh Ubuntu 22.04 install and I see that the icons in pcmanfm-qt are somehow odd and most of them are missing:
I crawled around a bit and found a few packages, whose missingness could be ...
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2
answers
27k
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How to install Qt6 on Ubuntu 21.10
When trying to open a program that requires Qt6, it gives error while loading shared libraries: libQt6Network.so.6: cannot open shared object file: No such file or directory. I tried installing Qt6 by ...
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4
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How do you install qt on ubuntu22.04
In ubuntu20.04 qt5-default was the package name. So I tried the same and qt6-default in 22.04.
Then I tried apt-cache search qt which revealed (among many others): qt6-base-dev and qt5-base-dev.
I am ...
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1
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Applyin GTK themes to Dolphin?
Is there a way to apply GNOME GTK theme (I use GNOME 40.5 and Ubuntu 21.10) to Dolphin File manager?
As Dolphin is QT, I guess I cannot apply the same exact theme used by GNOME on that, but if there ...
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0
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204
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Syntax Error on accessing JSON data in QML data from python youtube_dl
I have a simple youtube_dl function to access the youtube download links here,
@QtCore.Slot(str, result=str)
def getDownloadLinks(self, url):
try:
with youtube_dl.YoutubeDL({}) as ydl:
...
0
votes
2
answers
294
views
Install 20.04 system libraries in 21.10
I'm facing a weird problem. I develop Qt/C++ applications. Until yesterday my dev machine and the target ones were both running Ubuntu 20.04.
Yesterday I had to upgrade my dev machine to 21.10 in ...
- 447
1
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1
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276
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Broken RStudio, VLC, and other apps because of Qt incompatibility on Ubuntu 20.04
I updated my system to use the lastest RStudio version, which required to install Qt from Qt's website (https://d13lb3tujbc8s0.cloudfront.net/onlineinstallers/qt-unified-linux-x64-4.2.0-online.run), ...
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2
votes
3
answers
2k
views
Cannot run Spyder on Ubuntu (windows bash)
I am very new to Linux and
I am using Windows 11
installed ubuntu bash from MS store and installed Spyder using this command
sudo apt-get install spyder
But when I call Spyder
I get this error
user1@...
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5
votes
0
answers
418
views
Increase scroll speed in Okular only
Okular scrolls (at least when using two-finger touchpad scrolling) much slower than most other applications on my computer (in particular evince).
Is there some way to increase the scrolling speed ...
- 267
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1
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58
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Tool bars and writing in app are unreadable in kavantum-dark theme
I have been using kavantum-dark theme in Lubuntu-20.04.3
Most of the apps run fine. But there are few in which the tool bars and writing in the app are unreadable. But this does not happen in other ...
- 103
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0
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119
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suddenly unable to boot into Kubuntu
I am suddenly unable to boot into Kubuntu, I didn't do anything weird to my system yesterday, and suddenly it does not boot, it gets stuck on the motherboards logo.
I've figured out already that when ...
