Michael Krufky wrote:
On Mon, Aug 11, 2008 at 3:43 PM, Mark Paulus
<mark.paulus@xxxxxxxxxxxxxxxxxxx> wrote:
Michael Krufky wrote:
2008/8/11 Mark Paulus <mark.paulus@xxxxxxxxxxxxxxxxxxx>:
Redirecting to linux-dvb on suggestion from
Video4Linux user.
-------- Original Message --------
Subject: Help with recent DVB/QAM problem please.
Hi all,
Background:
I have a machine in my basement with:
Hauppauge PVR-150 (connected to DCT2524)
Air2PC ATSC/OTA card (connected to antenna in attic)
Avermedia A180 (connected to comcast cable)
Dvico FusionHDTV RT 5 Lite (connectec comcast cable)
Debian using 2.6.24-x64 kernel
Situation:
Up until a week ago, I was able to use azap to tune in
a bunch of mplexids, and get good locks on both the A180 and the Dvico
card.
However, starting on Monday,
I am not able to get locks on either of my DVB cards.
I have been able, and am still able to get good locks
on my air2pc OTA card.
Can anyone help me figure out why I can't seem to see
anything from my 2 QAM cards? I've tried running a
dvbscan and neither card can make a good lock. What
other debugging tools can I use to try to find any QAM
signals? I've also tried doing a VSB-8 scan on the cable
cards, and also don't get any locks.
Mark,
It's good that you've moved the thread to the correct mailing list.
However, I did already answer you and asked you some questions, to
which you have not yet responded....
Quoting myself:
What variables have changed in your test environment since last Monday?
If the answer is "nothing" , then the problem is more than likely due
to your cable company moving services around.
First, you should confirm that you still have clear QAM available...
assuming yes, then I recommend scanning for channels again, using each
card.
Regards,
Mike
As far as I know, no variables have changed. The only thing that might
have been of note is that there seemed to have been a wierd Power Blip, and
my linux machine was off when I was not expecting it.
After turning it on, I noticed the problem. However, it seems wierd
to me that a power blip would blow both QAM cards, and yet leave the ATSC
and the PVR-150 alone. (I also have a PVR-150 attached to a Motorola
DCT-2524 in that machine).
My biggest problem I have right now is determining if there is even
any clear QAM available. I did a dtvscan -q from both cards, and neither
card is able to lock anything. Before last week, I was
able to get locks on many multiplexes, even those populated completely with
encrypted PIDs. (I would do an azap in one window
to lock a multiplex, then I could do a dvbstream in another window, and run
tsreader on my winxp box to actually look at a stream. Encrypted streams
would show up as read w/nothing to look at.
Clear streams could be clicked, and would play in VLC, so I could
see what it is.)
I will run another dtvscan to make sure things aren't there, but is
there any other means of determining the state of things QAM? Somehow my
Motorola DCT-2524 seems to still see channels and
work fine, so if Comcast did change something, then they did
it so that it doesn't affect their STBs.
This is my point, exactly. Since your provider has provided your STB,
they also have an interface into the STB that allows them to update
software and / or encryption keys, etc.
It is more than likely that your provider has changed the
characteristics of the services on their cable.
You may want to contact your provider directly and ask them what has
changed with your service within the past two weeks.
I've heard similar complaints from other users of your service provider.
Good Luck,
Mike
Well, I just wanted to post the fact that I have a resolution, so that
others might see this. I know I've seen this solution before, at least
in the ivtv side, but wanted to reiterate once again.
Apparently the issue was caused by a failing power supply. I came home
on Friday to the machine being off, and not wanting to power on at all.
Put a Power Supply tester on the Power Supply, and it still didn't want
to fire up. So, I changed out the Antec 400W PSU with a spare Cooler
Master 500W PSU I have, and walla, everything is working again.
Apparently the tuners on these DVB cards really require lots of juice,
and a failing PSU just couldn't supply it. So, the lack of tuning was
the warning sign that the PSU was about to fail.
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