Re: [linux-dvb] Hauppauge PVR-150 Vertical sync issue?
Devin Heitmueller <[email protected]>
| Newsgroups | gmane.linux.drivers.video-input-infrastructure,gmane.linux.drivers.dvb |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Dec 21, 2009 at 3:09 PM, Robert Longfield <[email protected]> wrote: > Well it gets even better. > So on the weekend I was able to steal a few minutes to properly > trouble shoot the issue now that I know it was in the mythbuntu box. > As a long shot I pulled out the Promise Tech Ultra133 TX2 / ATA card I > am using for the backup drive. With this card removed the sync issue > went away, when I put the card back in the issue returned. Now this > card was in the slot right next to the PVR-150 card. I moved the > controller card as far away as I could get from the PVR-150 and the > sync issue was gone. > > So it would appear that the Promise Tech card was causing some EM > interference with the PVR-150 card. I will keep an eye on this to make > sure that this was indeed the issue. > > Does it seem reasonable that this card would kick out interference like this? Having worked at a lab that did EMI compliance testing, I can definitely tell some stories of cases far stranger than that. But yeah, if the card works in a different slot, then it's unlikely any sort of PCI bus congestion issue but rather an EMI problem. Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com