From: Gianluca Gennari <gennarone@gmail.com>
To: Jim Darby <uberscubajim@gmail.com>,
linux-media@vger.kernel.org,
Mauro Carvalho Chehab <mchehab@redhat.com>
Subject: Re: Possible regression in 3.2 kernel with PCTV Nanostick T2 (em28xx, cxd2820r and tda18271)
Date: Thu, 12 Jan 2012 18:34:23 +0100 [thread overview]
Message-ID: <4F0F199F.8080804@gmail.com> (raw)
In-Reply-To: <4F0F0BEF.8040002@gmail.com>
Il 12/01/2012 17:35, Jim Darby ha scritto:
> On 12/01/12 16:22, Gianluca Gennari wrote:
>> Hi Jim,
>> you spotted a regression in the latest media_build release from
>> 11/01/2012.
>> I had the same problem here:
>>
>> "dvb_frontend_ioctl_legacy: doesn't know how to handle a DVBv3 call to
>> delivery system 0"
>>
>> with 3 totally different sticks (em28xx, dvb-usb, as102).
>>
>> Everything was working fine with media_build drivers from 08/01/2011, so
>> the problem originates from a patch committed in the last few days.
>>
>> In fact, I reverted this patch:
>>
>> http://patchwork.linuxtv.org/patch/9443/
>>
>> and Kaffeine started working again with all my DVB-T sticks.
>>
>> Best regards,
>> Gianluca
>
> I think that we need to be careful about two different problems here.
>
> The first is the regression that I originally reported. In this case the
> device stops sending data after a variable period of time and we get to
> miss the end of the programme that we're watching.
>
> The second, which is the one that Gianluca has spotted as well, is that
> there seems to be some form of API change in the latest linux-media
> which is causing kaffeine to stop working.
>
> I'm still unsure about the first. It might be a 32/64-bit problem (based
> on evidence from Simon Jones), it might be flaky hardware or it might be
> a real problem. I'm planning to build the 3.2.0 kernel (minus the
> linux-media patches) for 64-bit on different hardware and see what happens.
Yes, of course reverting that patch is not going to affect your first issue.
> As for the second I suspect it might be a kaffeine problem. It might
> just need recompiling with the new headers or it might need some work on
> it. I'll investigate that after I've solved the first regression.
>
> Pedant mode: the kaffeine problem isn't really a regression as such.
> It's more of a API versioning issue. More on this later.
>
> Hope this helps,
>
> Jim.
>
I don't think the intention of that patch was to broke support for DVBv3
applications when using a tuner with a single delivery system.
That would be quite a big API change.
Best regards,
Gianluca
next prev parent reply other threads:[~2012-01-12 17:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-10 13:28 Possible regression in 3.2 kernel with PCTV Nanostick T2 (em28xx, cxd2820r and tda18271) Jim Darby
2012-01-10 13:54 ` Steven Toth
2012-01-10 23:22 ` Jim Darby
2012-01-11 0:01 ` Steven Toth
2012-01-11 0:34 ` Andy Walls
2012-01-11 1:05 ` Antti Palosaari
2012-01-11 11:30 ` Jim Darby
2012-01-11 19:19 ` Jim Darby
2012-01-12 16:22 ` Gianluca Gennari
2012-01-12 16:35 ` Jim Darby
2012-01-12 17:13 ` Simon Jones
2012-01-12 17:34 ` Gianluca Gennari [this message]
2012-01-13 11:21 ` Mauro Carvalho Chehab
2012-01-13 11:45 ` Gianluca Gennari
2012-01-13 13:50 ` [PATCH] [media] dvb-core: preserve the delivery system at cache clear Mauro Carvalho Chehab
2012-01-13 16:04 ` Gianluca Gennari
2012-01-14 0:00 ` Jim Darby
2012-01-14 14:51 ` Mauro Carvalho Chehab
2012-01-13 13:09 ` Possible regression in 3.2 kernel with PCTV Nanostick T2 (em28xx, cxd2820r and tda18271) Jim Darby
2012-01-13 14:24 ` Gianluca Gennari
2012-01-12 14:29 ` Simon Jones
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