Qt is an application and UI framework. The K Desktop Environment is based on QT.

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Build a Qt5 image for a mx6

I'm currently going through a BSP procedure for building a miniSD card bootable image for a SoM board with a touchscreen and it uses Uboot, Linux kernel, Yocto and Qt5. While I have many years ...
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18 views

Trying to build icecc icemon, cmake can't find Qt5

I'm running Centos 7 and I want Icemon for icecc. If there is a package I can install, great, but I don't know of one, so I'm attempting to build it from scratch and that relies on cmake. My missing ...
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26 views

Building owncloud on openwrt: qt5keychain missing

I'm trying to build owncloud-client on openwrt but I got an issue and I couldn't find a way to solve it: -- Build of crashreporter disabled. -- Found Qt5 core, checking for further dependencies... -- ...
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26 views

Can I get QT 4 applications to work with HiDPI?

Lots of programs are working for me now with HiDPI, but there are still lots of programs that don't, like Mendeley Desktop (QT4, I think), and Okular (also QT, I believe). The icons are tiny, and many ...
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35 views

Program on Debian8.3 appears different than on Fedora18

I've made a couple of programs (Let's call them ProgressBar and LabelsAndInfo) with Qt4.8 and C++ for my enterprise's HW. It runs on a Fedora 18 and it works fine. Now, a mate is trying to run all ...
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30 views

In ubuntu, how to run an application in KISOK [single application] mode?

I have a Qt application, which I want to run in the Embedded device, ubuntu OS. KIOSK [Single application] mode without giving any control to use the OS or other features. But I am using the WICD ...
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24 views

How to turn a git repo into a ppa

Suppose I have a git repo, the instructions for building are: sudo apt-get -y install build-essential git mesa-common-dev libglu1-mesa-dev libsdl2-dev libsamplerate0-dev cd ~ wget ...
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102 views

FBDEV(0): FBIOPUTCMAP: Invalid argument

I am trying to solve a problem with my video output via HDMI, a situation is as follow. I have device (BeagleBone Black) which runs on Debian Jessie 8.2, I developed an application in Qt5 which ...
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1answer
183 views

Unable to find or load Qt platform plugin “xcb” on debian strech

I've been having a problem loading software that use xcb, such as vlc and plasma desktop. Vlc gives the following error: [0000000000ddc148] core libvlc: Running vlc with the default interface. Use ...
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57 views

Qt Creator not launching in OpenSUSE

After a few years using Ubuntu, I decided to go back to OpenSUSE. I installed Qt Creator using the online installer from Qt, along with all the framework versions I wanted. Qt Creator refuses to ...
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13 views

How to force correct name for .desktop file

I'm developing a Qt application using CMake, and am trying to make it difficult to open more than one copy of the app at the same time (as with Mac application packages -- you have to call the ...
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29 views

ArchLinux QT5 Segfault

I am having a problem with the Deepin launcher (dde-launcher). I managed to set up an Arch Linux and I like it but now I run into a problem: the launcher of Deepin is not working. I am not able to ...
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31 views

How to setup VLC with gtk file dialog?

My long lasting previous installation somehow tied up VLC and gtk file dialog. I didn't even do anything special, except installing VLC. After update to VLC 2.2.1 the file dialog was replaced to Qt ...
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68 views

wkhtmltopdf & debian - install

I have a question about the installation of wkhtmltopdf on Debian machines via the apt-get command. So far, I've tested three environments, with different results, and I'd like to better understand ...
2
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1answer
178 views

Symbol lookup errors in (Qt?) dynamically linked libraries

I'm using Ubuntu 15.10 Problem: For some days now I have been getting Errors like this when opening some applications: /usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1: undefined symbol: ...
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262 views

How do you open Wireshark's Legacy (GTK) By Default?

I've recently updated Wireshark on OSX El Capitan from 1.12.0 to 2.0.0. The newer stable release uses the Qt interface instead of the old X11 but the new UI is a lot buggy for me and I want the old ...
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145 views

QT Creator cross compiling for raspberry pi

I have used the instructions in link below for cross-compiling QT creator. While compiling qt base, I got the errors below after make -j 4. http://wiki.qt.io/RaspberryPi_Beginners_Guide collect2: ...
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22 views

Why does the system compose sequences take priority over my .XCompose file in Qt apps?

My usr/share/X11/locale/en_US.UTF-8/Compose <Multi_key> <minus> <greater> : "→" #Rightwards arrow My .XCompose file has a similar rule with a space at the end <Multi_key> ...
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50 views

QT application doesn't receive udp broadcast since linux kernel 3.13.0-70

I'm developing a QT application on Ubuntu and suddenly had problems because QT app doesn't receive UDP broadcast messages. They are visible in Wireshark on that machine, but never received in QT. ...
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23 views

Old(ish) package has QT3 dependency - my distro doesn't carry it

I'm trying to build pdfedit, whose latest version - from 2010 - requires QT 3 development files; yet - I only have QT 4 and up on my distro (Debian testing). Do I have any recourse other than manually ...
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1answer
46 views

How can i Fix my media players?

I always face a problem with media application that depend on qt and MPlayer it happen when I run my device for a long time I see error. This is photo in Linux mint 17.2 and Last question the same ...
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2answers
629 views

How to fix graphical issues with Qt applications? (dolphin:14635): Gdk-WARNING **: shmget failed: error 28 (No space left on device)

I'm on Linux Mint 17.2 Rafaela (i.e. Ubuntu 14.04) and all my QT-based applications have been ugly after an upgrade (text is scrambled, menu content disappear, cf. screenshot below). Environment $ ...
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1answer
169 views

What do I need to run Qt apps on Debian?

I am trying to run an application which uses Qt on a Debian 7 server and I get the error message: This application failed to start because it could not find or load the Qt platform plugin "xcb". and ...
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30 views

Why do GUI toolkits not support popular pixel densities? [closed]

Assuming some standard sized monitors with popular resolutions, there are some prominent pixel density categories. Historically 96 is the most common pixel density. With 4k you double up to about 180 ...
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37 views

Getting Dogtail to work with QT on GNOME 2

My question is in regards to GNOME 2 running on a CENTOS 5 box. I'm trying to get the Dogtail automation tool to work with my given box for the purpose of testing a QT application. Versions .7 (which ...
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1answer
34 views

Some applications become garbled and unusable

Over the past couple of weeks, my Linux Mint 17.2 installation has been acting up. Some programs, such as TortoiseHg, kdiff3, k3b, and some parts of Skype, become graphically corrupted and unusable. ...
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1answer
72 views

Which Gentoo Package provides Qt5CompositorConfig.cmake?

I would like to compile and then install Hawaii from source code, but I am stuck at the compiling GreenIsland (a dependency of Hawaii) from source code stage. I created a build subdirectory of the ...
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1answer
44 views

Which QT/KDE theme is this?

I am on mate and run only couple of programs from QT/KDE. One of them is qbittorrent I saw that the theme changed and became better but clueless which theme it is and due to which package upgrade ...
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15 views

Jerk in QT media player

I had created Video player in Qt-5.2.0. At backend, Qt is using gstreamer-1.0 for playing video. Whenever I play the video in QT Media Player, I see some jerk, and choppiness in video, while playing ...
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1answer
463 views

Qt Creator crashes on startup, but it worked before

I installed the latest Qt version (5.5.1), and Qt creator worked fine, I could build programs with it. However, after I installed cmake, downloaded opencv from source, and built it, Qt creator no ...
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1answer
56 views

What does it exactly mean if something “Requires Qt4”?

I need to get this program to work. As usual with linux software, it requires that I compile it myself without any real instructions. Fine, I tried to run cmake on it. ...
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1answer
525 views

root needed to launch X11 application

I'm building a Qt application using QML technologie. QML use OpenGL. The computer running the build is a CentOS 6.7, with intel GPU. I'm using it only on SSH, and I use XMing (or VcxSrv sometimes) ...
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1answer
20 views

segmentation fault/ not booting main from rcS

I'm trying to boot a 'main' executable from the rcS file /soft/main & 2>&1 >> /var/log/app.log & but I'm getting a segmentation fault witch is strange because when i cd to the application ...
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0answers
225 views

Can't start qtcreator

I'm trying to start qtcreator, but here is what i get: $ qtcreator libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: i965 libGL error: No matching fbConfigs or ...
2
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1answer
457 views

How to change QtCurve style/theme without KDE via config file editing?

I have downloaded a QtCurve theme. I do not use KDE, I use a standalone WM (awesome). How do I change QtCurve style/theme via config file editing? Which config file contains this setting?
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1answer
632 views

KDE 5 of Debian Jessie - What Qt version was used to compile it?

I had go back to Windows a while ago because of the incompatibility of linux desktops with high-res (UHD) and touch screens. As now it got much better than before, I'd like to come back to linux, as ...
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926 views

error while loading shared libraries: libboost_thread.so.1.54.0: cannot open shared object file: No such file or directory

I am trying to connect MongoDb with Qt c++. When I build it there is no error, just information like; :-1: warning: libboost_system.so.1.54.0, needed by /usr/local/lib/libboost_thread.so, may ...
21
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1answer
573 views

Multiple Keyboard Layouts and Shortcuts

I configured KDE to switch easily from a bépo (french-dvorak) to an azerty layout. I configured it with the KDE interface (systemsettings), but I guess it just call setxkbmap be and setxkbmap fr. The ...
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0answers
181 views

Cannot use keyboard within Qt app without sudo

I have an embedded Qt application crosscompiled that runs on BeagleBone Black. It works Ok, but one thing- It doesnt accept keyboard input if i wont run in directly on BeagleBone Black preceeding with ...
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99 views

How to prevent Qt Applications from using GTK+ theme

Whenever I want to use custom QML components in my apps it makes them use GTK+ theme. How can I prevent this? Why am I asking here? Because I believe it has something to do with files ...
3
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1answer
670 views

How can I set the default font size for all Qt5 apps?

I run Gnome, which has pretty good support for my HiDPI screen. However, when I run QT apps I can't seem to find a way to scale the fonts. Is there a way to do this without installing a full version ...
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1answer
88 views

What is the relationship between KDE and QT?

I found that most of KDE applications requires libqt libraries. So, What is the relationship between KDE and QT?
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1answer
1k views

How to debug an installed Qt5 library with GDB?

Background: I am programming with Qt5 and want to debug the core Qt5 libraries on Debian using GDB. I have installed all the necessary -dev and -dbg packages. When I try to debug, GDB complains that ...
10
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1answer
21k views

Chromium - Enabling Widevine Content Decryption Module

I am trying to enable Widevine inside Chromium in order to play video from source like Netflix. Recompiling Chromium is not really an option since I use Qt new browser that uses Chromium. I'm trying ...
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1answer
104 views

Command “>” failing in Embedded Linux only

I'm developing an app in Qt for Embedded Linux where I want to see how much (%) of the given partition is occupied. I found on the web that a way to do this would be by calling the df command passing ...
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107 views

How to change the Qt version used by TeXstudio in elementary os Freya?

I have installed TexStudio 2.8.8. When I open it, it says TeXStudio has been compiled with Qt 4.8.6 but running with Qt 4.7.3. Please get the correct runtime library. when I checked in terminal with ...
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14 views

0 Active connection while Downloading Blockchain?

I am not able to connect to download blockchain in logoscoin. It shows O active connection, I am also attach debug logs below: 2015-01-24 06:18:15 Logos version v0.8.6.4-ga5aedeb-beta (2015-01-22 ...
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112 views

assertion Failed error while running Bitcoin-Qt application?

I have downloaded Bitcoin-qt project from GitHub for Ubuntu 14.04, But I don't know why I'm getting error: Error: /main.cpp:2985: bool InitBlockIndex(): Assertion `block.hashMerkleRoot == ...
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40 views

Print to Qtopia Terminal

I'm trying to print hello to the Qtopia (2.2.0) Terminal using a program.desktop file program.desktop: [Translation] File=QtopiaApplications Context=program Comment[Desktop Entry/Name]=Use soft ...
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32 views

Trouble with installing libqca2-dev on ubuntu 12.04

I have installed Qt 4.8.4 from source at usr/local/Trolltec and now that I am trying to install libqca2-dev on Ubuntu 12.04, the apt-get tool fails with a dependency error stating that libqt4-dev is ...