I want to update qt 5.4.1 to Qt 5.5 or 5.4.2 because I want to test KDE Plasma on WayLand.

Note: Please provide solution that consume least network resources as I have limited bandwidth. KUbuntu 15.04

  • Note Please provide your Ubuntu version :)
    – A.B.
    Sep 8, 2015 at 5:31
  • KUbuntu 15.04 Updated
    – AhmedBilal
    Sep 8, 2015 at 5:33
  • int_ua Yes, I am using Kubuntu 15.04
    – AhmedBilal
    Sep 8, 2015 at 5:39
  • Just curious, what are the reasons to update? Is it segfaulting on every connect/disconnect of an external display? bugs.kde.org/show_bug.cgi?id=341497
    – int_ua
    Sep 8, 2015 at 13:28
  • int_ua Because, I want to test Wayland
    – AhmedBilal
    Sep 9, 2015 at 3:44

4 Answers 4


I advise you to install a virtual machine and install Ubuntu 15.10 indide this environment. Wily includes Qt 5.4.2.

Do not try to update your Vivid system with Qt 5.4.2.

  • 1
    Very good advice! :-)
    – Fabby
    Sep 8, 2015 at 20:43

As mentioned in other answers, this is not really recommended and may cause issues, however, if you really want it, go HERE and download the .run installer or

wget download.qt.io/official_releases/online_installers/qt-unified-linux-x64-online.run

chmod +x qt-unified-linux-x64-online.run


This will start the qt 5x installer.

  • And please share your results afterwards :)
    – int_ua
    Sep 8, 2015 at 9:34
  • 1
    I decide not to give it try as it is around 800MBs. Second, I replied after many days because my laptop bios get corrupted and I fixed it. Thank you everyone. Hope to test it when 15.10 released.
    – AhmedBilal
    Sep 13, 2015 at 8:32

Short: not ready yet.

General information is on this page: https://wiki.ubuntu.com/Touch/QtTesting

  • Ok. Then how to install 5.4.2?
    – AhmedBilal
    Sep 8, 2015 at 5:40
  • Well, basic algorithm for software not available in official repositories is 1) Try finding PPAs with newer versions, if that fails - 2) Try checking for package availability on official webpage and if that fails - 3) Try building and installing from sources. But that can be quite challenging, unfortunately.
    – int_ua
    Sep 8, 2015 at 9:39
  • Looks like Mark found 2) in the other answer, please share your results if you decide to try it.
    – int_ua
    Sep 8, 2015 at 9:40

Answer is totally based on my experience,and the same reason why I'm here,Searching for this same answer. Well now I have figured it out for me.


Just visit the link and download the offline installer for your machine and go through the simple click steps.I'm using ubuntu 14.04 and it worked for me pretty fine.

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