KWIN seems to frooze computer when playing video
I'm using Kubuntu 14.04 on my HTPC and I'm experiecing a problem that make computer randomly hangs when playing a video with XBMC 13.0, it can happend after 10 minutes playback a video or 1 hour, or some hours..... When it happends, image freezes and audio continues working, but system doesn't respond and I have to reset.
Today when it happened I tried to make system work by using mouse and keyboard, and it recovered from the problem, showing by a little time a message saying something like "window manager KWIN has been restarted due to a graphical error".
So KWIN seems to be the problem....
I forgot to tell.... I'm using XBMC 13.0 with Aeon Nox 18.104.22.168 for Gotham
Many thanks in advance