I installed Kubuntu 15.10 with KDE Plasma 5.4.2 on my Dell. However, when I use the task switcher (Alt + Tab), which is configured to list large image models of the running applications, some of the icons are displayed with lower resolution compared to others. For example, in my case, this problem can be seen with the Google Chrome, Skype, Mozilla Firefox icons. (See the pictures below)
What I have tried
Here is a list of the things I tried but none of them helped resolving the problem:
I downloaded a custom icon with higher resolution and replaced all Google Chrome icons in
/usr/share/icons/hicolor/SizexSize. This changed the application icon upon launching and in the status bar but not in the task switcher.
Following this question I added the correct
WM_CLASSattribute (which is
google-chrome) to the