When computer awakes from sleep mode, why TBS6980 cards doesn’t work?
Re: there is bug in TBS 6980 driver versions up to 1.0.0.3 that is preventing the TBS 6980 card to properly wake from sleep, so you need to update TBS 6980 driver to at least version 1.0.0.4, where that bug is fixed.
If you already upgraded to 1.0.0.4 and still have problems after wake from sleep, then you may have AMD/ATi based video card and thus you are affected by the following bug in newer Catalyst drivers:
http://thegreenbutton.com/forums/t/80396.aspx?PageIndex=2
in short Catalyst 9.8 is the latest that can properly resume from sleep the video mode with many of the AMD/ATi based video cards and all newer Catalyst drivers has the bug. so, the only solution in such case is to downgrade to Catalyst version 9.8