Archives | June 2012

I finally spent the day and gathered up all the various patches I had kicking around for the HVR-950q. They can be found here: http://git.kernellabs.com/?p=dheitmueller/cx23885_fixes.git;a=shortlog;h=refs/heads/950q_fixes This includes the longstanding bug at startup that would cause the xc5000 to not properly bind on the digital side, a rather nasty case that hangs the analog video decoder in adverse signal conditions, and a case where sometimes digital tuning succeeds but doesn't ever return a transport stream to userland. It also resolves the confusion users see when the run tools like...

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Well, that was painful. After a full day working with the various cards, I managed to get all of them working. A couple of caveats: The analog tuner on the HVR-1250 isn't supported yet. The composite and s-video inputs are working but the mt2131 driver doesn't have the required support for tuning to analog stations. The analog tuner is supported though on the HVR-1255, 1800 (both retail and OEM), 1850, etc. (since it's a different chip) While ALSA audio when doing raw capture *is* working, it doesn't seem to work with tvtime for some reason (I added the original ALSA capture support...

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Ever wonder why it's so common for somebody to check in a change to make some new product work, causing a regression in the tuner that *you* have? Well, here's why: All these boards use the exact same driver, despite the fact that they have different core chips and only some of them have an onboard MPEG encoder. To make matters worse, look at all the different input types: Even getting all the equipment together to do the testing is a PITA. I spent twenty minutes digging through boxes for a RCA L/R audio to 1/8" audio converter. It's trivial to accidentally make a change which...

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Been doing some HVR-950q debugging for the last couple of weeks. Finally getting around to cleanup on some existing patches that haven't gotten upstream, as well as investigating some new reliability problems. Out of concern that one of my problems might be power related, I dug up some hardware I hacked together about four years ago. Q: What does this rig do? It lets you see how much power the device is consuming? In the second photo you can see the tuner is drawing 416 milliamps while tuning to an analog channel. Q: Why should I care? Power consumption is a good indicator...

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