From: "Timothy D. Lenz" <tlenz@vorgon.com>
To: linux-media@vger.kernel.org
Subject: Re: cx5000 default auto sleep mode
Date: Mon, 10 May 2010 18:45:29 -0700 [thread overview]
Message-ID: <4BE8B6B9.1070605@vorgon.com> (raw)
In-Reply-To: <h2h829197381004142139q35705f60q61dd04b05f509af6@mail.gmail.com>
On 4/14/2010 9:39 PM, Devin Heitmueller wrote:
> On Wed, Apr 14, 2010 at 11:44 PM, Andy Walls<awalls@md.metrocast.net> wrote:
>> On Wed, 2010-04-14 at 13:40 -0400, Devin Heitmueller wrote:
>>> On Wed, Apr 14, 2010 at 1:29 PM, Timothy D. Lenz<tlenz@vorgon.com> wrote:
>>>> Thanks to Andy Walls, found out why I kept loosing 1 tuner on a FusionHD7
>>>> Dual express. Didn't know linux supported an auto sleep mode on the tuner
>>>> chips and that it defaulted to on. Seems like it would be better to default
>>>> to off.
>>>
>>> Regarding the general assertion that the power management should be
>>> disabled by default, I disagree. The power savings is considerable,
>>> the time to bring the tuner out of sleep is negligible, and it's
>>> generally good policy.
>>>
>>> Andy, do you have any actual details regarding the nature of the problem?
>>
>> Not really. DViCo Fusion dual digital tv card. One side of the card
>> would yield "black video screen" when starting a digital capture
>> sometime after (?) the VDR ATSC EPG plugin tried to suck off data. I'm
>> not sure there was a causal relationship.
>>
>> I hypothesized that one side of the dual-tuner was going stupid or one
>> of the two channels used in the cx23885 was getting confused. I was
>> looking at how to narrow the problem down to cx23885 chip or xc5000
>> tuner, or s5h14xx demod when I noted the power managment module option
>> for the xc5000. I suggested Tim try it.
>>
>> It was dumb luck that my guess actually made his symptoms go away.
>>
>> That's all I know.
>
> We did have a similar issue with the PCTV 800i. Basically, the GPIO
> definition was improperly defined for the xc5000 reset callback. As a
> result, it was strobing the reset on both the xc5000 *and* the
> s5h1411, which would then cause the s5h1411's hardware state to not
> match the driver state.
>
> After multiple round trips with the hardware engineer at PCTV, I
> finally concluded that there actually wasn't a way to strobe the reset
> without screwing up the demodulator, which prompted me to disable the
> xc5000 reset callback (see cx88-cards:2944).
>
> My guess is that the reset GPIO definition for that board is wrong (a
> problem exposed by this change), or that it's resetting the s5h1411 as
> well.
>
> Devin
>
I replaced the single tuner with the other FusionHD7 Dual Express I had
so there was two of the same cards. Within a few hours Both tuners where
down on the original card and even restarting drivers wouldn't bring it
back. So I moved the new card to it's slot and put the single back in in
case the old card was defective. I removed the no power off switch and
went out for awhile. When I came back vdr had crashed which often
happens when it tried to tune and there is no signal as in when a tuner
goes down. For some reason vdr/xine/xorg/vdpau combo is very unstable
when signal is poor or missing. I wish we could dump xine as it seems to
be the cause. I never had a problem with vdr crashing when it rained
knocking out signal when the nexus card was providing video.
next prev parent reply other threads:[~2010-05-11 1:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-14 17:29 cx5000 default auto sleep mode Timothy D. Lenz
2010-04-14 17:40 ` Devin Heitmueller
2010-04-15 3:44 ` Andy Walls
2010-04-15 4:39 ` Devin Heitmueller
2010-04-21 22:26 ` Timothy D. Lenz
2010-05-11 1:45 ` Timothy D. Lenz [this message]
2010-09-27 18:37 ` Timothy D. Lenz
2010-06-20 21:04 ` Timothy D. Lenz
2010-04-18 19:19 ` Timothy D. Lenz
2010-04-20 0:14 ` Timothy D. Lenz
2010-04-20 17:17 ` Timothy D. Lenz
2010-04-21 2:10 ` Timothy D. Lenz
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