[linux-dvb] tzap output concerns

Chun Chung LO cclo at astri.org
Mon Sep 24 07:37:13 CEST 2007


Yes, a cold boot may be needed to reload the firmware as the old
firmware is still in the Demod chip's NVRAM if the card's power not

As a warm boot, which is not a power cycle. Then as the driver may check
the Demod chip's firmware status. If the system is not power cycled but
a warm boot, the driver may "wrongly" recognized the old firmware is
loaded. But not the new one (which the firmware you expected). 

A re-load of firmware should only occurred when power is OFF, then ON.

Hope these helps. Thanks.

Best regards,
Lo Chun Chung (Chung)

-----Original Message-----
From: linux-dvb-bounces at linuxtv.org
[mailto:linux-dvb-bounces at linuxtv.org] On Behalf Of Dan Harper
Sent: Monday, 24 September, 2007 1:09 PM
To: linux-dvb
Subject: Re: [linux-dvb] tzap output concerns

On 24/09/2007, at 2:41 PM, Chun Chung LO wrote:
> Hi,
> But I noticed the UNC is not zero compared to the result in your first

> mail. As far as I know, BER is high but UNC is zero, the signal should

> be better than BER is low but UNC is NOT zero.
> Am I right ?

I would think so too, but the card was actually in a hung state with  
the original values I was reporting.  I couldn't actually lock onto a  
signal (I just didn't realise at the time as tzap was reporting a  
channel lock).

What is really strange is that I attempted kernel 2.6.22-2 (debian  
sid), firmware v 1.10 and the latest HG drivers, but then I lost one  
channel.  So I rolled back to 2.6.22-1, firmware v 3-beta1 and HG  
drivers from 2007-8-26.  Now I did get back to the original  
performance.  Until i cold booted to fix this hang, and now I've lost  
my channel again (the same as after the upgrade).

These are some really strange bugs... and I'm having trouble  
narrowing it down.

Can anyone please help with the process I should take to find where  
the problem is originating from?  What is the best way to eliminate  
possible problems?


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