Unfortunately a small bug entered 4.9: when using an Aurorae theme moving the window through the titlebar is delayed. It’s a bug we discovered a few days after the final tagging through the work on porting Plastik to QML.
Since the release we had quite a lot of bug reports for this issue and I have seen some forum threads about this issue. It is already fixed for 4.9.1 but this might be a little bit too late.
As the bug is just in the QML component, everybody is able to fix it localy. In order to do so follow these steps:
cd /tmp wget https://projects.kde.org/projects/kde/kde-workspace/repository/revisions/9ee6a775d592ec3f105892c32c7576d6cdd7c210/diff/kwin/clients/aurorae/src/qml/aurorae.qml?format=diff cd /usr/share/kde4/apps/kwin/aurorae/ sudo patch -p6 -i /tmp/aurorae.qml\?format\=diff
And now restart kwin. Just use KRunner and type
Please be aware that any distribution update for kwin will overwrite the local change and please note that depending on your distribution the path might be different (the path is taken from the Ubuntu package).
If you don’t want to experience such regressions in 4.10 I recommend to test the beta releases. The issue had been introduced in January or February and nobody had noticed (I use Aurorae but don’t move windows through the titlebar). I’m really surprised to see this issue being reported so often after the release that I have to write a blog post.
A small service announcment: as you might have noticed I did not write a this week in KWin post. I currently have a reduced connectivity which means the system having the xslt does not have Internet. So next week I will cover both weeks.