Bug#864200: Problem solved with cold reboot!
After several days of extensive testing of both the sound hardware
(with a reliable source of analog sound) and software, I discovered
that a cold reboot (where computer and analog TV card were both
completely powered down before the boot) solved this issue.
My mental model of what has gone on here is the system upgrade of
either/both the bttv and snd_bt87x kernel modules put my WINTV-GO card
in a peculiar hardware state where the video still worked but lineout
(the analog sound output from that card) did not work. And the warm
reboot I normally do after any kernel upgrade did not correct that
issue. Only power cycling that card with a cold reboot got it out of
that peculiar hardware state. I feel cold reboots are something of a
last resort so I doubt you would want to advise all Debian users to do
a cold reboot after every kernel upgrade. But that tactic was
effective this time.
This peculiar state has never happened before for something like a
decade of Debian experience with this card. However, I doubt there is
anything you can do to fix the above modules to avoid such rare
peculiar results during system upgrades so feel free to close this bug
report.
Alan
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Alan W. Irwin
Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).
Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
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Linux-powered Science
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