Bad HDMI performance in SL compared to Bootcamp W7

Question

Hi!
I've stumbled over a problem when playing back Netflix content from my MBP (2009) onto a TV via HDMI. The TV is perfectly recognized as second monitor, but fullscreen playback of streamed content (e.g. Netflix, but also iTunes) shows little video stuttering, especially during scenes with a lot of movement (using the high-performance grafix card). Running Windows 7 from the Bootcamp partition, Netflix playback is smooth, thus I doubt it is due to a hardware problem.
If anyone has an idea why SL shows such a bad performance, I'd appreciate to hear your opinion (or solution)!
Best,
Geo

Answer 1

Ok this driver must really be a **** up, i just ran a grapichs only test with "Xbench" and when i ran it with 9600M GT i only got 2 point more than with the 9400M
Results:
nVidia 9400M
Results 156.44
System Info
Xbench Version 1.3
System Version 10.5.6 (9G55)
Physical RAM 2048 MB
Model MacBookPro5,1
Drive Type Hitachi HTS543225L9SA02
Quartz Graphics Test 169.49
Line 162.85 10.84 Klines/sec [50% alpha]
Rectangle 198.70 59.32 Krects/sec [50% alpha]
Circle 165.19 13.47 Kcircles/sec [50% alpha]
Bezier 160.07 4.04 Kbeziers/sec [50% alpha]
Text 165.97 10.38 Kchars/sec
OpenGL Graphics Test 145.25
Spinning Squares 145.25 184.25 frames/sec
nVidia 9600M GT:
Results 158.17
System Info
Xbench Version 1.3
System Version 10.5.6 (9G55)
Physical RAM 2048 MB
Model MacBookPro5,1
Drive Type Hitachi HTS543225L9SA02
Quartz Graphics Test 171.55
Line 162.38 10.81 Klines/sec [50% alpha]
Rectangle 204.42 61.03 Krects/sec [50% alpha]
Circle 167.78 13.68 Kcircles/sec [50% alpha]
Bezier 161.95 4.08 Kbeziers/sec [50% alpha]
Text 167.77 10.49 Kchars/sec
OpenGL Graphics Test 146.73
Spinning Squares 146.73 186.13 frames/sec