vaapi: intel driver issues with old chipsets

Submitted by Hamid

Link to original bug (#789835)

Description

Previously filed a bug @ https://bugs.kde.org/show_bug.cgi?id=386284

After update to Kubuntu 17.10 video playback is buggy. On most video files Gwenview brings the whole system to a halt, just leaves some seconds to interact and kill the application to rescue the system or a warm reboot is necessary.

This happens elsewhere as well e.g. previewing video in Dolphin. In contrast VLC plays the videos smoothly and the system functions as usual. I guess some updated backends are at fault.

Version: 1.12.3