Arch Linux

ryazor

Member

From: Berlin

Registered: 2010-05-18

Posts: 8

[SOLVED] Qt 5.7 applications slow

Hello community,

since the updates of Qt to 5.7, Qt applications like keepassx, teamspeak3 or texmaker are extremely slow, almost unusable. It seems, like there is an input lag of 1 to 2 seconds each action (e.g. clicking on a menu item or editing text).
I configured the gtk2 style for Qt apps (via qt5ct).

$ qtchooser -print-env
QT_SELECT="default"
QTTOOLDIR="/usr/lib/qt/bin"
QTLIBDIR="/usr/lib"

I'm using Xfce 4.12 if that's relevant.

Any hints? Thanks in advance!

R.

Last edited by ryazor (2016-09-12 12:34:10)

stibi

Member

Registered: 2006-10-10

Posts: 34

Re: [SOLVED] Qt 5.7 applications slow

I have the same problem, same symptoms, quite bad Trying to find a solution...

stibi

Member

Registered: 2006-10-10

Posts: 34

Re: [SOLVED] Qt 5.7 applications slow

I just found this thread: https://bbs.archlinux.org/viewtopic.php?id=214147&p=3

It looks good, I have not read all of it yet…but it has some good hints, for example I get transmission-qt working again with:

1) Install qt5-styleplugins or qt5-styleplugins-git
2) Install qt5ct
3) Set environment variable in /etc/environment QT_QPA_PLATFORMTHEME=qt5ct
5) Start qt5ct and select breeze

ryazor

Member

From: Berlin

Registered: 2010-05-18

Posts: 8

Re: [SOLVED] Qt 5.7 applications slow

Somehow my problem disappeared. Although I'm not sure, I guess, it's related to a recent system update. Also I uninstalled qt5ct.