Re: pctv452e

[Antti Palosaari <crope@iki.fi>]

Hi guys,
I was able to got that device, just because of you, and I cannot 
reproduce that error. I ran it many hours against signal from modulator 
yesterday and it didn't hang. I used szap && mplayer. Also I ran w_scan. 
Only problem I saw was these I2C errors printed.

So you make tests, likely using szap, and say how I can make it hang?

regards
Antti



On 07/02/2012 07:33 PM, Steve Hill wrote:
>
> I've been using a Technotrend TT 3600 USB DVB-S2 receiver for a couple
> of years, which has (largely) been working fine under the S2-liplianin
> pctv452e driver.  I've been aware of a lot of documented problems with
> running this receiver under the 3.x kernel, so I've stuck with the 2.6
> series kernels.
>
> Unfortunately I've now had to upgrade to the 3.2.0 kernel for other
> unrelated reasons, and it seems that the device is more or less unusable
> under this kernel.  With the stock 3.2.0 kernel, the driver produces
> numerous I2C errors and is quite unreliable.  The I2C errors seem to be
> produced exclusively as a result of stb_6100_read_reg() reading register
> F, and notably all calls to stb6100_read_regs() seem to succeed, so I've
> replaced the stb_6100_read_reg() function with a call to
> stb6100_read_regs(), so it reads all the registers and then returns the
> requested one, rather than reading just the requested register.  This
> seems to make the I2C errors disappear.
>
> However, the card is still very unreliable - after about 5 minutes of
> receiving a channel (using MythTV), it breaks.  No errors logged in
> dmesg, but MythTV logs:
>
> DevRdB(/dev/dvb/adapter0/frontend0) Error: Poll giving up
> DVBSH(/dev/dvb/adapter0/frontend0) Error: Device error detected
> DVBRec(7:/dev/dvb/adapter0/frontend0) Error: Stream handler died
> unexpectedly.
>
>
> Can anyone give me any pointers that might help?  I've searched and
> searched and all I can see if people saying that it won't work since the
> DVB-S2 code was integrated into the kernel tree, but I've not seen
> anyone try to figure out _why_ it won't work.
>
> Thanks.
>


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