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

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10
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1answer
22k 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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0answers
20 views

Why is Qt not installed?

I have followed installation steps from https://wiki.qt.io/Install_Qt_5_on_Ubuntu When I try qmake -v qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory ...
0
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1answer
19 views

Use Debian Laptop as Bluetooth headset?

i want to use my laptop (Debian 8.4) as a bluetooth headset for my smartphone (OnePlus One, Android). This means not just audio of my phone, also incoming calls. I already managed to play normal ...
1
vote
1answer
59 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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0answers
8 views

Qtconfig doesn't apply the theme

As the title says I'm having trouble to make Qtconfig work. The settings in Qtconfig are saved but whenever I use a Qt app the theme not modified and it looks bad, it doesn't changes. I'm on Debian ...
1
vote
1answer
875 views

Buildroot OpenGL Capable Backend

I'm trying to configure QT 5 through buildroot and some options are not available with the message requires an OpenGL-capable backend. I'm using buildroot 2013.08-rc1 but the same message comes up ...
0
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0answers
11 views

How to install the qt5 version of dolphin on Debian testing?

I have tried to install the qt5 version of Dolphin on Debian testing with: sudo apt install dolphin But that only installed the old qt4 version of it.
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0answers
21 views

Unable to start VLC - could not find Qt platform plugin

I recently upgraded my Ubuntu from 14.04 to 15.10. Yesterday I tried installing KDE plasma desktop but due to some errors I had to remove it. The system asked for a partial upgrade and I did that. Now ...
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0answers
22 views

Can skipping `fsck` on boot impact serial-port communication?

I have a bizarre serial-port (RS-232) communications issue (it appears that some data is being dropped, though I'm not sure if it's outgoing, incoming, or both) that I'm observing sporadically. I've ...
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0answers
15 views

How to have better transition between Splash Screen and Program in Frame buffer?

I am currently using Yocto Embedded Linux with frame buffer. When the machine is boot up, there is a splash screen. After the the splash screen, I will run rc.local to autostart my program. The ...
3
votes
0answers
993 views

How do I set default font for all Qt5 applications?

In Qt4, there used to be a tool called qtconfig that allowed you to set the fonts and other stuff. It also picked up the settings from KDE4's control panel. I'm working with Qt5 now (binary ...
2
votes
1answer
534 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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0answers
16 views

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 ...
1
vote
1answer
901 views

Error QProcess: Destroyed while process is still running

Edit: I discovered that the problem is not related with the script cited below, but I'll leave it there just for history. Well, this error appears when I close texstudio with the viewer open (xdvi or ...
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0answers
25 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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0answers
30 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... -- ...
8
votes
3answers
19k views

How do I change which version of Qt is used for qmake?

I feel like there should be a simple way of doing this, but my googlefu is failing so I'd really appreciate some info on how to switch (or even permanently change) which version of Qt is used when ...
1
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0answers
51 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 ...
1
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0answers
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 ...
0
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0answers
45 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 ...
2
votes
0answers
28 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 http://download.qt....
0
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0answers
136 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 ...
2
votes
1answer
444 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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0answers
71 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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0answers
15 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 ...
2
votes
1answer
265 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: ...
0
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0answers
36 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 ...
1
vote
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 ...
0
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0answers
150 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: ...
21
votes
1answer
599 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
105 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 ...
0
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1answer
46 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 ...
0
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0answers
303 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 ...
3
votes
0answers
27 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> &...
1
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0answers
58 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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0answers
24 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 ...
1
vote
1answer
49 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 ...
1
vote
2answers
741 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 $ ...
0
votes
1answer
36 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. I'...
0
votes
1answer
183 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 ...
1
vote
0answers
31 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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0answers
44 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 ...
0
votes
1answer
80 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 ...
0
votes
1answer
536 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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0answers
17 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 ...
1
vote
1answer
61 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. XXXXX@debianvirtualbox:~/...
0
votes
1answer
642 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) ...
0
votes
1answer
21 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 ...
2
votes
0answers
241 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 ...
1
vote
1answer
667 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 ...