linux-kernel - Re: Regression 2.6.31: xc5000 no longer works with Myth-0.21-fixes branch

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Message-ID: <829197380907191859n64582aa1pb95dd524e292512b@mail.gmail.com>
Date:	Sun, 19 Jul 2009 21:59:45 -0400
From:	Devin Heitmueller <dheitmueller@...nellabs.com>
To:	Mark Lord <lkml@....ca>
Cc:	Steven Toth <stoth@...uxtv.org>, linux-media@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Regression 2.6.31: xc5000 no longer works with Myth-0.21-fixes 
	branch

On Sun, Jul 19, 2009 at 9:57 PM, Mark Lord<lkml@....ca> wrote:
> Devin Heitmueller wrote:
>>
>> 2.  You hit the known analog audio issue that is preventing people
>> from using analog with MythTV.  I guess you can look at the analog
>> support as a work in progress - it works with most apps, but there is
>> something going on specific to MythTV that I haven't isolated yet.
>> Note this issue is completely related to the 950q analog project and
>> has nothing to do with the xc5000 tuner improvements.
>
> ..
>
> One additional thing I noticed here, is that when tuning analog
> for the first time, the firmware is reloaded yet again.. even though
> it has already been loaded once for "digital" operation.
>
> Perhaps the extra 6-7second delay here is contributing to Myth's problems.

That theory would be very easy to check.  Just modprobe xc5000 with
no_poweroff=1, load up under digital mode, and then try analog mode
and see if you hit the segfault.

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com
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