[mythtv-users] Kernel 4.18 regression with some tuners

[Adam Stylinski]

On Mon, Sep 10, 2018 at 11:22:04AM -0400, Devin Heitmueller wrote:
> Hi Adam,
> 
> On Mon, Sep 10, 2018 at 10:18 AM, Adam Stylinski
> <kungfujesus06 at gmail.com> wrote:
> > On Sat, Sep 08, 2018 at 07:23:02PM -0400, Devin Heitmueller wrote:
> >> > I recently upgraded from kernel 4.17.1 to 4.18.6 and found out that I could no longer tune to any channels.  The channel scan in the mythtv-setup program would give me a non-sense error when trying
> > Hmm, I emailed them but haven't seen much of a response yet:
> > https://www.mail-archive.com/linux-media@vger.kernel.org/msg134848.html
> >
> > Admittedly, the email had a couple of typos (I sent it while rushing out of the house).  Still, oddly silent.
> 
> Not too odd, unfortunately.  The cx88 is a pretty old card.  The last
> time I did any work on it I had to dig around quite a bit to even find
> a PC that still had a PCI slot for testing/debug.
> 
> It would be very useful to know if you see any difference in behavior
> with the stock command line DVB tools.  Does azap report different
> results between the two kernels?
> 
> My guess is that either the DVBv3 API got broken through some subtle
> change in error handling, or it's something specific to that hardware
> design (i.e. cx88 with the lgdt3303).
> 
> Devin
> 
> -- 
> Devin J. Heitmueller - Kernel Labs
> http://www.kernellabs.com
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I tried to run azap but found I didn't have a channels.conf file and the wiki article I was working from had a dead link for it.  If you can give me a bit of instruction, I can probably get to trying it out this week with the known bad kernel. I know that dvb-fe-tool -m -v would just continuously report back "SYNC (0xb)".  That code return code may be wrong, I'm going by memory on that one.

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