Comment 4 for bug 997493

Tested again today after the pure-gl-waveform branch was merged to trunk.
The original issue as reported by Ilkka still stands with latest trunk. The issue reported in comment #2/4 is a different one.

The fullscreen issue is with all Display types with a little difference:
Filtered - Software: No waveforms displayed
Simple - QT GL: Waveforms garbled ( see screencast)
Filtered - QT GL: Waveforms static ( see screenshot from #1)
Simple - GL: Waveforms frozen
Filtered - GL: Waveforms frozen
Filtered - GLSLS: Waveforms frozen