Kubuntu 15.04 Vivid Vervet: Why do GTK apps look ugly?

Question

I'm running Kubuntu 15.04 Vivid Vervet Alpha 2. I am a KDE fan and love Plasma 5. However, I have this problem where GTK apps look like crap. Screenshots:

Thunderbird:

Upload boxes:

This is really frustrating especially with really good looking KDE Breeze themed apps like KMail and the like.

Solution

The new KDE Theme is called Breeze, but there is no Breeze for GTK (yet?). The old KDE theme is called Oxygen.

• Close your GTK apps.

Install Oxygen by:

sudo apt-get install plasma-theme-oxygen oxygen-molecule  \
gtk2-engines-oxygen  gtk3-engines-oxygen

Then go to:

1. System Settings
2. Appearance Section
3. Application Style
4. Gnome Application Style (GTK)
5. GTK Themes section
6. Switch to a different themes for both GTK2 and GTK3, press apply
7. Switch back to oxygen-gtk

Comments

[muru]

Questions on pre-release versions of Ubuntu are off-topic here. Please ask on Launchpad, instead.

[hackintosh777]

That doesn't work. The packages are broken.

[David]

Worked fine for me. I'm running it is Virtualbox vm. Packages change quickly. Just a sanity check, you ran apt-get update first, right?

[hackintosh777]

Actually had to reinstall Kubuntu because of a botched apt-get upgrade, so I tried switching away from oxygen-gtk and back. It works.

[timss]

For future reference: Current releases of Kubuntu include uniform Qt and GTK application style. For anything else, see github.com/dirruk1/gnome-breeze