[mythtv-users] Ways to improve TV Out quality

Ben Rometsch ben at solidstategroup.com
Sun Jul 25 13:21:45 EDT 2004

I've tried combinations of all of these, and it does not really help. 

Are there any kernel filters that I might try?

I meant to post my XF86Config in the previous post, but forgot, so here it

Section "Files"
 FontPath "unix/:7100"   # local font server
 # if the local font server has problems, we can fall back on these
 FontPath "/usr/lib/X11/fonts/Type1"
 FontPath "/usr/lib/X11/fonts/TrueType"
 FontPath "/usr/lib/X11/fonts/CID"
 FontPath "/usr/lib/X11/fonts/Speedo"
 FontPath "/usr/lib/X11/fonts/100dpi"
 FontPath "/usr/lib/X11/fonts/75dpi"
 FontPath "/usr/lib/X11/fonts/misc"

Section "Module"
 Load "GLcore"
 Load "bitmap"
 Load "dbe"
 Load "ddc"
 Load "dri"
 Load "extmod"
 Load "freetype"
 Load "glx"
 Load "int10"
 Load "record"
 Load "speedo"
 Load "type1"
 Load "vbe"

Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver  "keyboard"
 Option  "CoreKeyboard"
 Option  "XkbRules" "xfree86"
 Option  "XkbModel" "pc102"
 Option  "XkbLayout" "uk"

Section "InputDevice"
 Identifier      "MX500 Mouse"
 Driver          "mouse"
 Option          "CorePointer"
 Option          "Device"                "/dev/input/mice"
 Option          "Protocol"              "ExplorerPS/2"
 Option          "Emulate3Buttons"       "false"
 Option          "Buttons"               "8"
 Option          "ZAxisMapping"          "4 5"

Section "Device"
 Identifier "Radeon 8500"
 Driver  "radeon"
   BoardName    "R200 QL"
   Driver       "radeon"
   Screen       0
   Option       "Rotate" "off"
   VendorName   "ATI"
    Option "TVStandard" "PAL-I" 

Section "Monitor"
  Identifier "Television"
  HorizSync    30.0 - 50.0
  VertRefresh  60

  ModeLine "800x600x60" 39.7901  800 840 968 1056  600 601 605 628  
  Mode "720x576"
    DotClock 42.6
    HTimings 720 760 832 944
    VTimings 576 577 580 602
    Flags    "-HSync" "-VSync"

Section "Screen"
 Identifier "Default Screen"
 Device  "Radeon 8500"
 Monitor  "Television"
 DefaultDepth 24
 SubSection "Display"
  Depth  24
  Modes  "800x600x60" "720x576"
 #Option  "XaaNoSolidBresenhamLine" "true"

Section "ServerLayout"
 Identifier "Default Layout"
 Screen  "Default Screen"
 InputDevice "Generic Keyboard"
 InputDevice "MX500 Mouse"

Section "DRI"
 Mode 0666

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of J. Donavan Stanley
Sent: 25 July 2004 18:09
To: Discussion about mythtv
Subject: Re: [mythtv-users] Ways to improve TV Out quality

Ben Rometsch wrote:

>Hi There,
>Right, I finally have my myth setup working on my main TV downstairs. I 
>eventually used one of these to provide TV out capability:
>Now, I am in the UK (PAL-I I believe) and running off a Sony 32" 100Hz 
>wega TV, being driven by a Avermedia 771 DVB-T card. I'm not sure what 
>the best resolution or modeline is that I should be running in? Can 
>anyone provide any suggestions here?
>The picture on the whole is OK, but it suffers from two major problems:
>1 - It is not 100% smooth. It's hard to describe the effect that is 
>being generated, but it's as if it is only running 18 fps or so. The 
>image is not totally solid; basically it looks like it has gone through 
>a computer! I'm not sure if the XF86Config is correct for my setup, but 
>switching back to normal terrestrial analogue TV everything just looks 
>a lot more fluid and smooth.
>2 - Ghosting. Horizontal pans (especially with white on black) cause 
>huge ghosting issues. If I pause Live TV it generally shows 2 frames on 
>the screen, one slightly transparent.

Do you ahve any/all of the following turned on in Myth?
A/V Sync
Jitter reduction

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