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Windows 7: "tearing" of Clear QAM Hauppauge HVR-2250 only when ONE channel is act

27 Aug 2011   #1
htewam

Windows 7 Professional 64-bit
 
 
"tearing" of Clear QAM Hauppauge HVR-2250 only when ONE channel is act

Having an unusual problem with "tearing" when I am watching/recording Clear QAM channels with my HVR-2250/MCE/Windows 7 setup. If I view or record a single channel -- there is significant "noise/tearing" in the video and audio stream -- most noticable on HD channels. When I start a recording and then go and watch a different channel, this problem seems to disappear. I thought it might be a problem with one specific hardware decoder or the other but I went into MCE and configured for only one or the other channel... regardless, that channel has the problem.

My configuration - Asus P7H55-M Pro w/ Intel I3; Hauppauge HVR-2250; Windows 7 w/ Media Center; Comcast ClearQAM (no STB)

I checked that I have the most up to date drivers and BIOS -- I never really noticed the problem until we got a high-def flat screen -- which was when I started to record more "HD" Clear QAM content. It's really odd that it acts BETTER if both of the HVR's channels are running. By the way, if I tune the same channel simultaneously with my Samsung flat sceen -- the direct signal looks great.

Typical scenarios:
a) Watch OR Record a single HD channel (or even some SD channels) -- Problems about 80% of the time
b) Start watching HD channel and then start recording a 2nd channel -- Watched channel continues to show problems and recorded channel is fine
c) Start recording HD channel first and then start watching 2nd channel -- Watched channel is fine
d) Watch/record same HD channel (presumably using one HVR decoder) -- Problem occurs

Now the interesting experiment:
e) Start recording HD channel, start watching 2nd channel, and then stop recording 1st channel - Watched channel continues to look good - but if I stop the viewing and then restart, the problem comes back.

I don't know anything about how the HVR-2250/Media Center software utilizes DMA channels so I don't know what hardware/software would be selected/controlled in the one channel/two channel scenarios.


My System SpecsSystem Spec
.

27 Aug 2011   #2
Sardonicus

Windows 7 Home Premium 64 bit
 
 

Are you using a dedicated video card or Intel 2000/3000 video?
My System SpecsSystem Spec
28 Aug 2011   #3
htewam

Windows 7 Professional 64-bit
 
 

The built-in video --- Intel Core i3-540 Clarkdale 3.06GHz

I initially thought it might be a video issue but the problem appears to show up in the RECORDED video as well...
My System SpecsSystem Spec
.


29 Aug 2011   #4
Sardonicus

Windows 7 Home Premium 64 bit
 
 

Are you using Hauppauge driver version 7.9.1.28162?
My System SpecsSystem Spec
29 Aug 2011   #5
htewam

Windows 7 Professional 64-bit
 
 

Sorry for the slow replies -- but yes, 7.9.1.28162 -- I also saw that I did not have the latest BIOS update on my motherboard so I upgraded that as well -- but with not change in the result.
My System SpecsSystem Spec
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 "tearing" of Clear QAM Hauppauge HVR-2250 only when ONE channel is act




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