Skystar2: random "no Video/Audio detected"

[infinityloop]

MediaPortal Version: SVN Build 11674 (11.11.2006 / 23:34 CET)
MediaPortal TV-Server Version: SVN Build 11674 11-12-2006--01-12h

MediaPortal Skin: blue2
Windows Version: Windows XP SP2
CPU Type: AMD AthlonXP 3000+
HDD: Samsung 200GB
Memory: 512 MB DDR PC3200
Motherboard: Asus A7N8X Deluxe
Motherboard Chipset: Nvidia nforce2
Motherboard Bios: Award 1008
Video Card: WinFast A6600 GT TDH-128 (S-Video out)
Video Card Driver: Forceware
Sound Card: realtek
Sound Card AC3: coaxial out/ optical out
Sound Card Driver: 1.16
1. TV Card: Technisat Skystar 2
1. TV Card Type: DVB-S
1. TV Card Driver: 4.4.0
2. TV Card: Hauppauge Nova-T USB Stick
2. TV Card Type: DVB-T
2. TV Card Driver: 2.5e
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: MPV
MPEG2 Audio Codec: MPA
Satelite/CableTV Provider: Astra 19.2°E
HTPC Case: standard ATX case
Cooling:
Power Supply: Bequite 400W
Remote: Microsoft MCE Remote
TV: Panasonic 16:9
TV - HTPC Connection: S-Video

note: MediaPortal always determins a signal level of 0 for the Skystar2. even when it is working. seems like the dirvers do not support the sharing of the signal level?

--------------MediaPortal Client -------------

Configuration: Network - 1 TV-Server -> streaming

Test1:

1. start TV-Server -> tv-server starts to grab epg from VIVA
2. start MediaPortal
3. enter MyTV
4. tune SAT.1
5. MyTV displays "no video/audio detected"
   Attachment 1276
6. close MediaPortal
7. stop tv-service
   Logs: Attachment 1278

Test2:

1. start TV-Server -> tv-server starts to grab epg from SAT.1
2. start MediaPortal
3. enter MyTV
4. tune SAT.1
5. after ~4seconds MyTV displays SAT.1
   Attachment 1277
6. close MediaPortal
7. stop tv-service
   Logs: Attachment 1279

This can be repeated endlessly. somethimes it works. soemtimes it doesnt.

Additional information:
I have tested the same precedure 10 times with an Hauppauge NOVA-T USB2 Stick.
It NEVER showed this behaviour. MyTV always showed the selected channel.

It seems like this is a Skystar2 specific issue.


--------------manual conrol-------------

Test3:

1. start TV-Server -> tv-server starts to grab epg from SAT.1
2. enter manual control
3. start TS for SAT.1 (on Skystar2)
4. TV-Server started timeshift
5. start VLC on PC in the LAN and connect to the stream
6. works. VLC can display the stream.

repeated this test 10 times. starting timeshift in manual control always worked.
VLC was always able to connect to the stream over the lan.

EDIT:
"no Video/Audio detected also occurs in manual control!"