Based on the new SGMiner which is working with the latest AMD 14.6beta and had been created by djm34 (https://bitcointalk.org/index.php?action=profile;u=215787) - Thanks a lot for him and his efforts -, I re-complied the sgminer and fixed a consistent (idle/work resuming) issue within the mining process.
The problem had been totally solved, the results (before/after) of the new sgminer are (using X11mod):
AMD 7950: Before (2.4Mh/s) - after (3.39Mh/s) @1000/1500
AMD 280X: Before (3.2Mh/s) - after (4.3Mh/s) @1150/1500
Ref Sapphire 7950 win7-32. Before 3.070 avg. Wu .044 After 3.840 avg. Wu .056 2 threads. Gonna head over to the other machine win7-64 She's at 3.220 on 14.4 right now. When i hit it with 14.6 beta I'm going for 4000 kh/s. Thankx to all involved. Kudos