[mythtv-users] Screen Flicker Issues. Frustrating!

[Christopher McEwan]

In your profiles make sure your resolution is set correctly, for
example in the UK its 720x576. There was a problem wherby the standard
resolution would cause screen flicker.


On Wed, 3 Nov 2004 22:40:35 -0500 (EST), David Bosiljevac
<dave at sanman.ca> wrote:
> Hi all,
> 
> I've been having a screen flicker issue with my Myth setup since I got it up and
> running a couple of months ago. The flicker happens whether I watch live TV or in
> recorded programs. It also exists in any exports that I make to DVD or SVCD. It's
> not persistent, but sometimes it gets worse and other times it's not to be seen.
> (And it's not part of the cable TV signal, as I can watch TV on a regular set with
> no flickering.)
> 
> I've tried so many different things, but nothing seems to work. It's just getting
> frustrating.
> 
> My setup is as follows:
> 
> Hardware
> - AMD XP 3200+
> - 1 GB memory
> - Asus A7V880 motherboard
> - Western Digital 120 GB UDMA hard drive (operating system drive)
> - 2 x 120 GB Western Digital S-ATA hard drives (striped, RAID-0)
> - Hauppauge PVR-250 video capture card
> - Asus Radeon 9200 video card
> 
> Software
> - Debian Linux - kernel version 2.4.27 custom compiled
> - Myth 0.16
> - ivtv 0.1.9
> - Hauppauge firmware 1.18.21.22168 (latest non-beta firmware)
> 
> Here's what I've tried so far to isolate the problem:
> 
> I tried setting ivtv up with the "No ghosting" option ---
> Get rid of double vision or image ghosting:
> no-ghost: test_ioctl --set-codec-params=dnr_mode=0,dnr_temporal=0)
> --- No luck!
> 
> Originally, I had the operating system and video capture data on the two striped
> serial-ATA drives. I went out and bought a regular UDMA drive and threw the
> operating system on it, and kept the S-ATA drives strictly for the video data.
> Again, no luck!
> 
> I downloaded the latest firmware for the Hauppauge card, loaded it, then reloaded my
> ivtv drivers. Still, no luck!
> 
> I tried moving the Hauppauge card into a different PCI slot in the system. Alas, you
> guessed it, no luck!
> 
> I'm at wits end trying to figure out what the problem could be.
> 
> I'll see if I can post an example screen capture or video clip of what the problem
> is. I can't guarantee it though.
> 
> Has anyone had any sorts of problems like this? I thought it might be hard drive
> performance, but I don't think that's it (although I'm not ruling it out).
> 
> Here's my hdparm results:
> 
> --> operating system drive
> krusty:~# hdparm -tT /dev/hda
> 
> /dev/hda:
> Timing cached reads: 1320 MB in 2.00 seconds = 660.00 MB/sec
> Timing buffered disk reads: 168 MB in 3.02 seconds = 55.63 MB/sec
> 
> --> raid drive (myth capture data)
> krusty:~# hdparm -tT /dev/md0
> 
> /dev/md0:
> Timing cached reads: 1380 MB in 2.00 seconds = 690.00 MB/sec
> Timing buffered disk reads: 238 MB in 3.00 seconds = 79.33 MB/sec
> krusty:~#
> 
> ANY help would be greatly appreciated.
> 
> Thanks in advance!
> 
> Dave
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> 


-- 
Regards,


~CM