[mythtv-users] RE: Help!!! Garbled Video

Sat Oct 9 17:04:48 UTC 2004

This is exactly what I had been experiencing, with approximately the 
same setup.  I opted to rebuild the system with FC2 also.  I had 
previously been using CVS, but for the rebuild used the atrpms, hoping 
that the rpms were more stable.  When I was done, I had the same 
problem I had before I started, although it took a little time before 
it showed up again.

One of the symptoms was that commercial skip wasn't working right, and 
the hard drive was going nuts.  I asked on this list for suggestions, 
and one of the replies mentioned turning off commercial flagging made 
the poster's system "rock solid."

So, I turned off commercial flagging and the problem went away ...

If for nothing more than to test, try turning off commercial flagging 
and see if the system settles down.

By the way, Chris Pinkham, I'm more than willing to help debug this 
problem, but after last weekend, I'm taking some time off from working 
on the system.  It will take me some time to convert back over to CVS 
from atrpms, but when I do I'll compile with debug and try to trace 
some things for you.

What is curious is that three out of the four people that have 
mentioned this problem
have been using 2 PVR-250 cards.  I also only noticed the problem after 
setting recording options from the default of 480x480 to 720x480.  I 
know this isn't much help, but that's all I've got for right now.

-jm

On Oct 9, 2004, at 12:11 PM, Thomas Lea wrote:

> Mike,
>
> I am experiencing the same thing and it started about the same time 
> (shortly
> after I upgraded to 0.16).  My system has been running flawlessly for
> exactly one year and has been the only way my wife and 3 kids can 
> watch TV
> in my house (in other words, it's been heavily used).
>
> For the past year I had been running on my own LFS 5.0 system with 
> various
> builds of MythTV.  A few weeks ago I upgraded to 0.16.  Shortly 
> thereafter I
> started seeing exactly the same video problems you have (I viewed your 
> video
> clip).  At that point I was a bit tired of my LFS system and decided to
> install FC2 and the ATRPMs for Myth 0.16 to get up quickly.  This 
> involved
> new ivtv drivers as well.  Since everything was changing (except Myth
> version) I expected my problem to magically disappear since nobody 
> else was
> reporting this video problem that I had noticed.  Unfortunately the 
> same
> problem existed on my new system.
>
> My hardware:  Dell 400sc with two WinTV PVR-250s, 2.4Ghz P4, 512MB 
> RAM.  I'm
> using analog cable, so they are doing the tuning.
>
> It would seem that the common denominator is MythTV 0.16.
>
> FYI, I followed Jarod's guide a couple of days ago for the install.
>
> Regards,
> Thomas
>
> -----Original Message-----
> Date: Sat, 9 Oct 2004 02:28:41 -0500
> From: Mike Green <mikey at linuxwiz.org>
> Subject: [mythtv-users] Help!!! Garbled Video
> To: mythtv-users at mythtv.org
> Message-ID: <200410090228.41727.mikey at linuxwiz.org>
> Content-Type: text/plain;  charset="us-ascii"
>
> I have just about exhausted trying everything I know to try.  I am at 
> my
> wit's
> end!  About three weeks ago, the recordings and livetv on my mythbox 
> started
>
> getting garbled, almost as though the channels are not tuning in quite
> right.
> The weird thing is that certain channels do not seem to be affected, in
> particular msnbc.  The rest of the channels, either recorded or livetv,
> garble,
> like I am trying to watch a cable channel that I didn't pay for.
>
> I am running a gentoo box kernel 2.6.8 (-gentoo-r7) with nptl, with 
> dual
> pentium II 400Mhz processors, 256MB ram, a pvr 250, mythtv 0.16, ivtv 
> 0.1.9
> (0.1.10pre2-ck71d obtained from gentoo portage ivtv-0.1.9-r4), xorg 
> X11,
> nvidia
> 4363 running off of the TV-Out on my GeForce2 MX 400.
>
> I recently upgraded to gentoo and thought maybe something was going on 
> so I
> booted back to my old reliable 2.4.22/linux from scratch box and see 
> the
> same
> results.  I have tried several different versions of the ivtv driver
> (pre2-ck100z, pre2-ck114f, pre2-ck114q), tried turning preemption 
> on/off in
> the kernel, tried a 2.6.7 kernel, yadda yadda yadda.  Nothing seems to 
> make
> a
> difference.  This box has been running great for months,
>
> Here is some relevant dmesg output:
>
> Linux video capture interface: v1.00
> ivtv: version 0.1.9 (0.1.10pre2-ck71d) loading
> ivtv: Autodetecting cardtype for card #0
> ivtv: Autodetecting cardtype for card #1
> ivtv: Autodetecting cardtype for card #2
> ivtv: Autodetecting cardtype for card #3
> ivtv: Autodetecting cardtype for card #4
> ivtv: Autodetecting cardtype for card #5
> ivtv: Autodetecting cardtype for card #6
> ivtv: Autodetecting cardtype for card #7
> ivtv: Autodetecting cardtype for card #8
> ivtv: Found an iTVC15 based chip
> ivtv (i2c)= 0xd09bfd40
> msp34xx: init: chip=MSP3445G-B8, has NICAM support, simple (D) mode, 
> simpler
> (G) no-thread mode
> msp34xx: $Id$ compiled on: Oct  9 2004 01:29:24
> saa7114.c: starting probe for adapter ivtv i2c driver #0 (0x10005)
> saa7114.c: detecting saa7114 client on address 0x42
> saa7115.c: writing init values
> status: (1E) 0x09, (1F) 0xc0
> tuner: chip found at addr 0xc2 i2c-bus ivtv i2c driver #0
> tuner: type set to 2 (Philips NTSC (FI1236,FM1236 and compatibles)) by
> insmod option
> tuner: The type=<n> insmod option will go away soon.
> tuner: Please use the tuner=<n> option provided by
> tuner: tv aard core driver (bttv, saa7134, ...) instead.
> ivtv: Encoder revision: 0x02040024
> ivtv: Decoder revision: 0x02020023
> ivtv: Registered v4l2 device, minor 0
> ivtv: Registered v4l2 device, minor 32
> ivtv: Registered v4l2 device, minor 224
> ivtv: Registered v4l2 device, minor 24
> ivtv: Creating Stream 0 size 180
> ivtv: Creating Stream 1 size 120
> ivtv: Creating Stream 2 size 64
> ivtv: Creating Stream 3 size 100
> ivtv: loaded
> saa7115[0]: decoder set norm NTSC
> saa7115[0] set audio: 0x02
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set picture bright=127 contrast=63 saturation=63 
> hue=0
> saa7115[0]: decoder set size
> Hpsc: 0x00001, Hfsc: 0x00480
> Setting full NTSC height
> msp34xx: VIDIOCSAUDIO setting va->volume to 58950
> msp34xx: VIDIOCSAUDIO setting va->volume to 58950
> msp34xx: VIDIOCSAUDIO setting va->balance to 32768
> msp34xx: VIDIOCSAUDIO setting va->flags to 30
> msp34xx: VIDIOCSAUDIO setting msp->left to 58950
> msp34xx: VIDIOCSAUDIO setting msp->right to 58950
> msp34xx: VIDIOCSAUDIO setting msp->bass to 32768
> msp34xx: VIDIOCSAUDIO setting msp->treble to 32768
> msp34xx: VIDIOCSAUDIO setting msp->mode to 0
>
> Here are my modules settings:
> alias char-major-81     videodev
> alias char-major-81-0   ivtv
> options ivtv ivtv_debug=1 mpg_buffers=90
> options tuner type=2
> #options msp3400 once=1 simple=1
> add below ivtv msp3400 saa7115 tuner
> post-install ivtv /usr/bin/ivtvctl -d /dev/video0 -u 0x3000
> #post-install ivtv /usr/bin/test_ioctl -d /dev/video0 -u 0x3000
>
> lspci output:
> 0000:00:00.0 Host bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host
> bridge (rev 03)
> 0000:00:01.0 PCI bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP 
> bridge
> (rev 03)
> 0000:00:07.0 ISA bridge: Intel Corp. 82371AB/EB/MB PIIX4 ISA (rev 02)
> 0000:00:07.1 IDE interface: Intel Corp. 82371AB/EB/MB PIIX4 IDE (rev 
> 01)
> 0000:00:07.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev 
> 01)
> 0000:00:07.3 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ACPI (rev 02)
> 0000:00:0d.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX
> [Cyclone] (rev 30)
> 0000:00:10.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] 
> (rev
> 06)
> 0000:00:14.0 Multimedia video controller: Internext Compression Inc 
> iTVC15
> MPEG-2 Encoder (rev 01)
> 0000:01:00.0 VGA compatible controller: nVidia Corporation NV11 
> [GeForce2
> MX/MX 400] (rev b2)
>
> My input is comcast digital cable, I have a splitter and can only 
> record
> analog
> channels.
>
> Examples of good/bad recordings:
> http://home.comcast.net/~anon6969/good.mpg
> http://home.comcast.net/~anon6969/bad.mpg
>
> Any help would be greatly appreciated.  If more information is needed I
> would
> be glad to provide.  I can't live without my mythtv!!!
>
> I have tried booting back into my old box, tweaks with hdparm, 
> installing it
>
> all on a different box (P4 1.7GHz) in a different room/cable, tried
> mythtv 0.15.1, endless tweaks with modprobe.conf (albeit wild guesses),
> power
> cycling, recompiling my entire box with nptl, screaming at my dog, 
> pissing
> off
> my wife, and praying.  None of it has helped :)
>
>
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