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ATI TV-out not working.. scrambled tv image
http://forum.linhes.org/viewtopic.php?f=2&t=11142		 Page 1 of 1
Author:  zboy [ Sat Aug 12, 2006 9:48 am ]
Post subject:  ATI TV-out not working.. scrambled tv image
Ok,

So I got an old ATI RAGE Pro card from a friend with composite video output. It displays to the TV fine (well, clear picture, but not centered on the screen) during bootup, but once MythTV starts it gets all scrambled.
I've gone into the XF86Config-4 file and played with the settings a bit, but haven't gotten it to work.

Should I keep playing with this card? Or would I be better off dropping $50 on a new ATI or NVIDIA from COMPUSA?

here's what I have for the screen section right now:

Code:
Section "Monitor"
   Identifier   "MyTV"
#   Option   "DPMS"   "true"
#   HorizSync    28.0 - 78.0 # Warning: This may fry very old Monitors
#   HorizSync    28.0 - 96.0 # Warning: This may fry old Monitors
#   VertRefresh  50.0 - 75.0 # Very conservative. May flicker.
#   VertRefresh  50.0 - 62.0 # Extreme conservative. Will flicker. TFT default.
   HorizSync 30-50
   VertRefresh 60
   # 640x480 @ 60Hz (Industry standard) hsync: 31.5kHz
   ModeLine "640x480"    25.2  640  656  752  800    480  490  492  525 -hsync -vsync
   # 800x600 @ 60Hz (VESA) hsync: 37.9kHz
   ModeLine "800x600"    40.0  800  840  968 1056    600  601  605  628 +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      "ati"
   VendorName  "All"
   BoardName   "All"
#   BusID       "PCI:1:0:0"
EndSection

Section "Screen"
   Identifier "Screen0"
   Device     "Card0"
   Monitor    "MyTV"
   DefaultColorDepth 16
   SubSection "Display"
      Depth     16
#      Modes "800x600" "640x480"
      Modes "640x480"
   EndSubSection
EndSection
Author:  tjc [ Sat Aug 12, 2006 11:04 am ]
Post subject: 
I would recommend picking up a new Nvidia card with DVI and Svideo outputs. The FX5200 based ones are known to work well for AGP or PCI, the 6200 based ones for PCIe. The DVI part of the recommendation has to do with the fact that this seems to be linked to cards that have better line driver circuitry which produces more "in spec" voltage levels for TV output. This helps even if you have to use an S-Video to Composite adapter.

BTW - If you haven't seen the hardware section on the wiki, it's time for a visit. This is all covered there... http://www.knoppmythwiki.org/index.php?page=VideoCards
Author:  zboy [ Sat Aug 12, 2006 12:11 pm ]
Post subject: 
yeah.. I ran across that this morning.

If I do purchase a new card, will I have to re-install anything? or will drivers already be installed from my initial installation? or will an auto-update from the install CD install the drivers I need?

thanks
Author:  tjc [ Sat Aug 12, 2006 1:28 pm ]
Post subject: 
Most of the time it should autodetect the hardware change and install a driver. You may still need to reconfigure X via the /etc/X11/XF86Config-4 file, but there are several canned examples around that you can just drop into place.
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