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TV on vga through adapter gives twice top of screen [workabl
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hika
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PostPosted: Fri Sep 13, 2013 7:34 pm    Post subject: TV on vga through adapter gives twice top of screen [workabl Reply with quote

I've made an adapter to connect a TV to VGA (see: http://www.nexusuk.org/projects/vga2scart/). It seems to work, only I get twice the top half of the output on the screen.
The videocard is a Geforce3 NV20. I also tried a Geforce2 (no output) and a RIVA (same result)
I tried both the nouveau, the nv and the vesa drivers. nv refuses to interlace and vesa also won't accept the screendefenition.
This is my xorg.conf
Code:
Section "ServerLayout"
   Identifier     "Default Layout"
#   Screen      0 "Screen-IVTV"       0 0
#   Screen      0 "Screen-Medion"    0 0
   Screen      0 "Screen-TV"       0 0
   Option        "Xinerama"      "On"
EndSection

Section "Module"
   load    "v4l"
   load   "ivtv"
EndSection

Section "Device"
   Identifier   "Card-Nouveau"
   Driver      "Nouveau"
#   Driver      "vesa"
   VendorName   "NVIDIA Corporation"
   BoardName   "GeForce3 TI 200 NV20"
   BusID      "PCI:1:0:0"
   Screen       0
   Option      "ZaphodHeads"      "VGA-1"
   Option      "RenderAccel"       "On"
   Option      "OpenGLOverlay"       "On"
   Option      "Monitor-VGA-1"      "Mon-TV"
   Option      "TVDACLoadDetect"   "On"
   Option      "TVStandard"      "ntsc"
   Option      "IgnoreEDID"
EndSection

Section "Screen"
   Identifier      "Screen-TV"
   Monitor      "Mon-TV"
   Device      "Card-Nouveau"
   DefaultDepth    24
   DefaultFbBpp    32
   SubSection   "Display"
      Depth    24
      FbBpp    32
      Modes   "720x576pali"
   EndSubSection
EndSection

Section "Monitor"
   Identifier      "Mon-TV"
   VendorName   "Philips"
   ModelName   "TV"
   HorizSync       10-45 #kHz
   VertRefresh    25-120 #Hz
   Modeline "800x576pali"   15.38  800 823 895 984  576 580 583 625 -hsync -vsync interlace
   Modeline "768x576pali"   14.76  768 789 858 944  576 580 583 625 -hsync -vsync interlace
   Modeline "720x576pali"   13.88  720 742 808 888  576 580 583 625 -hsync -vsync interlace
   Modeline "704x576pali"   13.50  704 722 786 864  576 580 583 625 -hsync -vsync interlace
   Modeline "650x576pali"   12.50  650 669 728 800  576 580 583 625 -hsync -vsync interlace
   Modeline "800x480ntsci"   15.10  800 808 879 960  480 484 487 525 -hsync -vsync interlace
   Modeline "720x480ntsci"   13.59  720 727 791 864  480 484 487 525 -hsync -vsync interlace
   Modeline "704x480ntsci"   13.34  704 714 776 848  480 484 487 525 -hsync -vsync interlace
   Modeline "657x480ntsci"   12.50  657 667 725 792  480 484 487 525 -hsync -vsync interlace
   Modeline "640x480ntsci"   11.32  640 646 703 786  480 484 487 525 -hsync -vsync interlace
   DisplaySize    580   328
   Option      "dpms"   "Off"
   Option      "Enabled"
EndSection

Section "Device"
   Identifier   "Card-WinTV"
   Driver      "ivtv"
   VendorName   "Hauppage Corporation"
   BoardName   "WinTV pvr-350"
   BusID      "PCI:0:9:0"
   Option      "fbdev"         "/dev/fb1"
   Option      "VideoOverlay"      "On"
   Option      "XVideo"      "1"
EndSection


section "Screen"
   Identifier   "Screen-IVTV"
   Monitor      "Mon-IVTV"
   Device      "Card-WinTV"
   DefaultDepth    24
   DefaultFbBpp    32
   SubSection   "Display"
      Depth    24
      FbBpp    32
#      Modes   "640x400"
      Modes   "720x480"
   EndSubSection
EndSection

Section "Monitor"
   Identifier   "Mon-IVTV"
   VendorName   "Philips"
   ModelName   "TV"
#   HorizSync    10-68 #kHz
#   VertRefresh    25-120 #Hz
   DisplaySize    580   328
# NTSC
# D: 34.563 MHz, H: 37.244 kHz, V 73.897 Hz
   Mode "720x480"
      DotClock    34.564
      HTimings    720 752 840 928
      VTimings    480 484 488 504
      Flags      "-HSync" "-VSync"
   EndMode
# Default
# D: 23.83 MHz, H: 29.8 kHz, V 59.8 Hz
   Mode "640x480"
      DotClock    23.832
      HTimings    640 735 759 800
      VTimings    480 494 496 497
      Flags      "-HSync" "-VSync" "-CSync"
   EndMode
   Mode "640x400"
      DotClock    23.832
      HTimings    640 735 759 800
      VTimings    400 454 456 497
      Flags      "-HSync" "-VSync"
   EndMode
   Mode "720x480"
      DotClock    23.832
      HTimings    720 775 799 800
      VTimings    480 494 496 497
      Flags      "-HSync" "-VSync"
   EndMode
# PAL
   Mode "720x576"
      DotClock    42.6
      HTimings    720 760 832 944
      VTimings    576 577 580 602
      Flags      "-HSync" "-VSync"
   EndMode
   Mode "640x480"
      DotClock    23.721
      HTimings    640 735 759 800
      VTimings    480 542 544 593
      Flags      "-HSync" "-VSync"
   EndMode
   Mode "720x576"
      DotClock    23.721
      HTimings    720 775 799 800
      VTimings    576 590 592 593
      Flags      "-HSync" "-VSync"
   EndMode
   Option      "dpms"   "Off"
   Option      "Enabled"
EndSection


As you see there is also a configuration for the ivtv-out and that works OK. I got all the modelines from internet.
If I look at the dotclock and the missing interlace it seems to be non interlaced.
I tried those ivtv modelines with the vga-to tv, but then I only get an out of sync signal. The difference of cause is that the ivtv-out is S-video.

Has anybody some hints on settings to adapt. Or should I try a non nvidia card. I might have a very old one lying around.

Hika


Last edited by hika on Sat Sep 14, 2013 1:20 am; edited 1 time in total
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hika
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Joined: 13 Mar 2009
Posts: 224
Location: Utrecht

PostPosted: Fri Sep 13, 2013 7:46 pm    Post subject: Reply with quote

I'm suddenly thinking: Could it help if I put a signal on pin 8 from the scart?

The definition says:
Code:
 0      to  +2V:   Default TV mode
+5      to  +8V:   AV 16:9 mode
+9.5V   to +12V:   AV  4:3 mode


Hika
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hika
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Posts: 224
Location: Utrecht

PostPosted: Sat Sep 14, 2013 1:19 am    Post subject: Reply with quote

Ok With the Riva card the NV driver wants to display interlaced.
I read on several places that the nouveau driver has a lot of issues with interlaced and I have only nvidia agp4 cards lying around.
And the older nvidia-drivers I would need don't install against a 3.8.13 kernel.
I have to play still with the modeline, for the displayed screen is falling outside visibility, but I can tell you the display is 500% better than s-video.
I'm now displaying them both and switching between the two, the ivtv-s-video display is bleak and less stable.

Hika
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