19 votes

Gtk-Message: Failed to load module "overlay-scrollbar" Ubuntu 17.10

In my computer with Ubuntu 16.04, I solved it installing the package overlay-scrollbar-gtk2: sudo apt-get install --reinstall overlay-scrollbar-gtk2
Joan's user avatar
  • 191
10 votes
Accepted

QtCreator not recognizing linked libraries after upgrading Ubuntu to 20.04

Same issue here, same solution as @nou. QtCreator 4.11 still relies on clang-8, but on Ubuntu 20.04 apt will install clang-10. The following solved the problem for me: Install clang 8 sudo apt ...
leodin's user avatar
  • 116
9 votes
Accepted

Cant find Qt5Designer, qt5svg and qt5x11extras

To anyone else having the issue with qttools5-dev-tools not installing Qt Designer stuff try sudo apt install qttools5-dev instead (note there is no -tools at the end). I was also lacking qt5svg ...
thewolfaxe's user avatar
6 votes
Accepted

Qt Creator not working with VirtualBox 3D Acceleration

disable 3d acceleration from virtualbox settings and boot the system In Qt Creator, go to Help → About Plugins… Uncheck Qt Creator –> Welcome exit Qt Creator, shutdown system and enable 3d ...
tudorbarascu's user avatar
6 votes

QtCreator not recognizing linked libraries after upgrading Ubuntu to 20.04

I am not 100% sure that this is same problem but I solved it by installing clang-8 package. I think problem is that qtcreator code model plugin use libclang1-8 but clang-10 get installed by default.
nou's user avatar
  • 111
5 votes
Accepted

Qtcreator hangs and crashes

I've had the same issue, 3.5.1 is super buggy. I fixed the problem by getting 4.2.1 from the Qt Online Installer.
Vadim Peretokin's user avatar
5 votes
Accepted

PyQT Creator Qt designer: No such file or directory

Thanks to @dessert for helping me out. I ran sudo apt-get install qt5-default and everything worked fine. The answer was "inspired" from the answer here, which didn't work for me, but might work ...
John Lexus's user avatar
4 votes
Accepted

Where (directory) to install Qt?

It should be available for all users, not me. ... answers your question. I would go for /opt/ purely so you separate it from your main system. Even though it might not 100% completely match the /opt/ ...
Rinzwind's user avatar
  • 299k
4 votes

Install 20.04 system libraries in 21.10

Upgrading a single app out of band is never a good idea, especially regarding glibc. For build tools the best way to deal with that issue is to use a Docker container. Downgrading is an option but ...
Nicolas Formichella's user avatar
3 votes

Force OpenGL software rendering for specific programs

$ LIBGL_ALWAYS_SOFTWARE=1 ./the_program_name or $ QT_XCB_FORCE_SOFTWARE_OPENGL=1 ./the_program_name
Thundercoal's user avatar
3 votes

Where (directory) to install Qt?

Qt is already installed on Ubuntu. If you want to develop Qt5 applications with QtCreator, then simply install the qtcreator package. If you do need to install a newer version, then the installer ...
dobey's user avatar
  • 41k
3 votes

Ubuntu 14.04 QtCreator Qt5 examples missing

In Ubuntu 18.04 the QtCreator examples and API docs missing, This is my way to solve this problem, should apply to almost every Ubuntu release. For QtCreator and Examples and API Docs: sudo apt ...
Aaron's user avatar
  • 71
3 votes

Debug Qt application on ubuntu with root permission using qt creator

I would run the program from a terminal with a GDB server (as root) and then connect to the server with gdb from QtCreator. You would start gdbserver with something like this: $ sudo gdbserver host:...
benzeno's user avatar
  • 131
3 votes

How can i uninstall QtCreator 2.6.1 from 12.04?

I installed QtCreator from the default .run file distributed from the website. QtCreator is located on ~/Qt/ directory. You'll see the MaintenanceTool executable there, you have to run that on ...
Tuhin Mitra's user avatar
3 votes

Error connecting Qt Creator to Raspberry Pi using ssh

This is not a bug in Buildroot. On your server, you need to edit /etc/ssh/sshd_config and add this line : Ciphers +aes128-cbc Then restart the ssh daemon or reboot your RPi. See man sshd_config. ...
dpeng's user avatar
  • 156
3 votes
Accepted

OpenCV imread() problem

This comment provided the correct solution: So - what happens, exactly? My guess is that your filepath is invalid (it needs to be "/home/ali/opencv/lena.png" - note the leading /) – steeldriver ...
SeAlGhz's user avatar
  • 43
3 votes

Gtk-Message: Failed to load module "overlay-scrollbar" Ubuntu 17.10

You have three options here: Ignore the warnings Remove overlay-scrollbar stuff #Step 1 echo "export GTK_OVERLAY_SCROLLING=0" >> ~/.profile #Step 2 mkdir -p ~/.config/gtk-3.0 cat <<EOF &...
N0rbert's user avatar
  • 99.7k
3 votes
Accepted

How do I discover my current system encoding?

Apparently it's only a font problem with the remote website and has nothing to do with the locale configuration on your system. Additionally, the browser has its own locale settings and the locale ...
Yaron's user avatar
  • 544
3 votes

Install 20.04 system libraries in 21.10

Targeting at interim release is impractical. To ease workflow you have to use Long Term Support version on both development and client machines. At present time the latest is LTS is 20.04 LTS, as you ...
N0rbert's user avatar
  • 99.7k
2 votes

How build against qt 5.3.1?

Sometimes, it is hard to track build dependencies using cmake/make build errors. Better to install all build dependency used by release package using: sudo apt-get build-dep qtcreator This will save ...
user.dz's user avatar
  • 48k
2 votes
Accepted

QT Creator missing help files?

Install some possibly required gstreamer-plugins using this command: sudo apt-get install libgstreamer-plugins-base0.10-0
Wylie Coyote SG.'s user avatar
2 votes

Where is the Qt Maintenance Tool?

I found the maintenance tool binary for my installation at /opt/Qt5.7.0/MaintenanceTool on Ubuntu 14.04. I found it by using the locate tool: sudo apt-get install mlocate sudo updatedb locate -i ...
Ross Rogers's user avatar
2 votes

Ubuntu 14.04 QtCreator Qt5 examples missing

I'm on Ubuntu 20.04 and also suffering this "examples not showing" issue. Also, when opening an existing qt-based project, it complains "kits is not OK to use". And if I do sudo ...
HaxtraZ's user avatar
  • 151
2 votes
Accepted

Ubuntu SDK and Qt Creator on same machine

Yes, it can, I also use both Ubuntu SDK and QtCreator, with no problem whatsoever.
Michal Polovka's user avatar
2 votes
Accepted

Qt5 - how to use Free? Asking for money

To get it for free select the following options at the various steps: Step 1: select In house development or Select opensource Step 2: distribute :select No Step 3: able to comply withe the licenses :...
George Udosen's user avatar
2 votes

unable to open QtCreator

This is just a platform theme, simply delete the file /opt/Qt5.8.0/Tools/QtCreator/lib/Qt/plugins/platformthemes/libqgtk3.so and it should start. You will have to tackle another problem regarding "/...
Cristian Adam's user avatar
2 votes
Accepted

Font size in Qt Creator is too small

openjdk-9-jdk has been replaced by openjdk-11-jdk in Ubuntu 18.04. To install it open the terminal and type: sudo apt update sudo apt upgrade sudo apt install openjdk-11-jdk I don't expect ...
karel's user avatar
  • 114k
2 votes
Accepted

No examples are shown in Welcome screen of qtcreator

It's possible you have installed Qt Creator but not the Qt5 development libraries. Try installing the development libraries with: sudo apt install qt5-default Then try launching Qt Creator and see ...
gsxruk's user avatar
  • 1,380
2 votes

No examples are shown in Welcome screen of qtcreator

This may be an issue caused by not recognized qmake, i.e. QtVersion in Menu->Settings->Kits->Kits->QtVersion, showing None. Manually choosing it to /usr/bin/qmake and will get correct qt ...
HaxtraZ's user avatar
  • 151
2 votes

Where is .deb file created after running the command sudo make install in qt 4.8 installation process in Ubuntu?

It's not necessary to compile Qt4 from source because Qt 4.8 is provided by the qt4-default package in all currently supported versions of Ubuntu. To install it open the terminal and type: sudo apt ...
karel's user avatar
  • 114k

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