I have tried to find solution to my problem at the forum, but I cannot fix it myself.
First of all I want to say, that monitor output works fine. But I want to use S-Video output integrated with Epia mainboard, connected to TV.
TV-output displays text mode BIOS information, then usual static bootsplash Image, But when it comes to display MythTV main menu window - I only get blue window output (it probably means that TV is loosing synchronisation), It suprised me, becouse previousely I've entered 'tv' at the splashscreeen, and change the refresh rate in XF86Config-4 (refresh values comes from "The Pamphlet of KnoppMyth").
I have test TV-out under another Linux PVR distro - Freepia - and TV works fine all the time.
After reading Forum posts I've entered all necessary changes to XF86Config-4 from XF86Config-4.epia.tvout.sample.
Result is unfortunately the same.
I'm also using 17" Siemens CRT Monitor.
It would be greatly appreciated if anyone can suggest how to fix this problem.

The main part of actual XF86Config-4 looks like this:

Section "Module"
Load "ddc" # ddc probing of monitor
# Load "GLcore"
Load "dbe"
Load "dri"
Load "drm"
Load "extmod"
# Load "glx"
Load "bitmap" # bitmap-fonts
Load "speedo"
Load "type1"
Load "freetype"
Load "record"
EndSection

# Auto-generated by KNOPPIX mkxf86config
Section "Monitor"
Identifier "Monitor0"
Option "DPMS" "false"
VendorName "SIE"
ModelName "SIE0100"
HorizSync 30 - 50 # DDC-probed
VertRefresh 60 # DDC-probed
# Default modes distilled from
# "VESA and Industry Standards and Guide for Computer Display Monitor
# Timing", version 1.0, revision 0.8, adopted September 17, 1998.
# $XFree86: xc/programs/Xserver/hw/xfree86/etc/vesamodes,v 1.4 1999/11/18 16:52:17 tsi Exp $
# 640x350 @ 85Hz (VESA) hsync: 37.9kHz
ModeLine "640x350" 31.5 640 672 736 832 350 382 385 445 +hsync -vsync
# 640x400 @ 85Hz (VESA) hsync: 37.9kHz
ModeLine "640x400" 31.5 640 672 736 832 400 401 404 445 -hsync +vsync
# 720x400 @ 85Hz (VESA) hsync: 37.9kHz
ModeLine "720x400" 35.5 720 756 828 936 400 401 404 446 -hsync +vsync
# 640x480 @ 60Hz (Industry standard) hsync: 31.5kHz
ModeLine "640x480" 25.2 640 656 752 800 480 490 492 525 -hsync -vsync
# 640x480 @ 72Hz (VESA) hsync: 37.9kHz
ModeLine "640x480" 31.5 640 664 704 832 480 489 491 520 -hsync -vsync
# 640x480 @ 75Hz (VESA) hsync: 37.5kHz
ModeLine "640x480" 31.5 640 656 720 840 480 481 484 500 -hsync -vsync
# 640x480 @ 85Hz (VESA) hsync: 43.3kHz
ModeLine "640x480" 36.0 640 696 752 832 480 481 484 509 -hsync -vsync
# 800x600 @ 56Hz (VESA) hsync: 35.2kHz
ModeLine "800x600" 36.0 800 824 896 1024 600 601 603 625 +hsync +vsync
# 800x600 @ 60Hz (VESA) hsync: 37.9kHz
ModeLine "800x600" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
# 800x600 @ 72Hz (VESA) hsync: 48.1kHz
ModeLine "800x600" 50.0 800 856 976 1040 600 637 643 666 +hsync +vsync
# 800x600 @ 75Hz (VESA) hsync: 46.9kHz
ModeLine "800x600" 49.5 800 816 896 1056 600 601 604 625 +hsync +vsync
# 800x600 @ 85Hz (VESA) hsync: 53.7kHz
ModeLine "800x600" 56.3 800 832 896 1048 600 601 604 631 +hsync +vsync

[ and so on ...]

# 1600x1200 @ 100.00 Hz (GTF) hsync: 127.10 kHz; pclk: 280.64 MHz
ModeLine "1600x1200" 280.64 1600 1728 1904 2208 1200 1201 1204 1271 -HSync +Vsync
EndSection

Section "Device"
### Available Driver options are:-
# sw_cursor is needed for some ati and radeon cards
#Option "sw_cursor"
#Option "hw_cursor"
#Option "NoAccel"
#Option "ShowCache"
#Option "ShadowFB"
#Option "UseFBDev"
#Option "Rotate"
Identifier "Card0"
# The following line is auto-generated by KNOPPIX mkxf86config
Driver "via"
VendorName "All"
BoardName "All"
# BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultColorDepth 16
SubSection "Display"
Depth 1
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "800x600" "640x480"
EndSubSection
EndSection

Section "DRI"
Mode 0666
EndSection

seems like you are probably missing some tvout options in your device section. I am not familiar with the via options, but I know I've seen them on the forum before. Also it would be good to look at /var/log/XFree86.0.log (it's something close to that) and see if there are any errors.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

Yes, I think you're definitely missing some important modelines. Try the screen sections from this chap's X config file, they worked fine with my M10000. Although I use Composite output. Make sure you pick the S-Video section (Identifier "MonitorTvRGB")

Thanks a lot!
It works !!!
I think it was MonitorTV section in
lordsnooty's post (attached config file).

Another problem is to force Leadtek WinFast 2000XP Expert to work for me, about it in other post ...