[mythtv-users] Getting no video in xawtv with correctly installed
BTTV....any ideas? * lots of info provided*
Mike Miller
miller44 at optonline.net
Mon Jun 30 00:35:01 EDT 2003
Heres what I got
debian:~# more /proc/interrupts
CPU0
0: 724109 XT-PIC timer
1: 2779 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 627 XT-PIC eth0
8: 3 XT-PIC rtc
11: 2037 XT-PIC bttv
12: 37569 XT-PIC PS/2 Mouse
14: 8735 XT-PIC ide0
15: 0 XT-PIC ide1
NMI: 0
LOC: 724088
ERR: 65
MIS: 0
Doesn't appear to be any conflict...
-----Original Message-----
From: mythtv-users-bounces at snowman.net
[mailto:mythtv-users-bounces at snowman.net] On Behalf Of Ray Olszewski
Sent: Sunday, June 29, 2003 11:05 PM
To: 'Discussion about mythtv'
Subject: Re: [mythtv-users] Getting no video in xawtv with correctly
installed BTTV....any ideas? * lots of info provided*
This report looks to me more like a hardware problem than an xawtv
problem.
It just happens to turn up with xawtv because that's the video app you
are
using in your tests.
The important part is here (I think):
bttv0: irq: SCERR risc_count=1f512008
This says that the bttv driver is reporting an error that comes from the
irq handler. SCERR just means System Call ERRor, not deeply informative.
But I did find one report on the v4l list that associated this behavior
with IRQ sharing (in particular, sharing with another very active
device,
the sound card). So look into that possibility. IRQ sharing itself is
legal
in Linux, but it can still be a bad idea if two very active devices try
to
use the same interrupt.
1. "more /proc/interrupts" will show you what devices have actively been
using IRQs. Run it after a failed attempt to use xawtv. See what else is
on
IRQ 11.
2. If it looks like there is a conflict, the solution depends on your
hardware and BIOS. You may need to move cards from slot to slot to
change
the IRQ arrangement, or your BIOS might let you do it. Try to get the
bttv
card on an irq not used by anything else.
At 09:39 PM 6/29/2003 -0400, Mike Miller wrote:
>I know I said I was quitting but I couldn't quite give up yet. Ive
done
>some more poking around,
[...]
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