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Widescreen Aspect Ratio
http://forums.linhes.org/viewtopic.php?f=6&t=15987		 Page 1 of 1
Author:  nicom [ Fri Jul 27, 2007 9:17 pm ]
Post subject:  Widescreen Aspect Ratio
I have my Dragon2 machine working but have been trying for days to get full screen 16:9 aspect ratio on my 42" Plasma (1024x1024 pixels) screen. Both the OSD and TV playback appear as 4:3 and are truncated on the sides replaced with black strips. I have trawled through this forum, the wiki and the mythtv site but cannot find the solution.

I tried forcing the aspect ratio to 16:9 in Setup>Playback but that produced a 16:9 image the same width as before but with a reduced height. When I run the nVidia setup from menu on the Knoppmyth desktop it indicates the resolution is set to 1024x768 (4:3). When I try to force it to a resolution of 1024x576 I am unable to save the settings because the window is too large and the save button is off-screen.

I have modified the xorg.conf to specify the DisplaySize and have input my own Modeline for a 1024x576 resolution. The last bit of my xorg.conf file is as follows.
Code:
Section "Monitor"
   Identifier   "Monitor0"
   Option   "DPMS"   "FALSE"
   Option    "UseEdidDpi" "FALSE"
   Option    "DPI" "100 x 100"
   VendorName   "Fujitsu"
   DisplaySize   260 146
   ModelName   "P42HH"
   HorizSync   30-81 # from table in manual
   VertRefresh   50-86 # from table in manual
   # Modelines
   # 1024x768, 60.0Hz; hfreq=48.61, vfreq=60.24
   #Modeline "1024x768@60" 64.56 1024 1056 1296 1328 768 783 791 807
   # 1024x576, 60 Hz; hfreq=36.47, vfreq=60.29
   Modeline "1024x576@60" 45.81 1024 1056 1224 1256 576 587 593 605
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      "nvidia"
   VendorName  "All"
   BoardName   "All"
#   BusID       "PCI:1:0:0"
EndSection

Section "Screen"
   Identifier "Screen0"
   Device     "Card0"
   Monitor    "Monitor0"
   DefaultColorDepth 24
   SubSection "Display"
      Depth     1
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth     4
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth     8
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth     15
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth     16
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth     24
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth     32
      Modes "1024x768" "800x600" "640x480"
   EndSubSection
EndSection

Section "DRI"
   Mode 0666
EndSection


I have tried adding "1024x576" mode to the "Screen" section of xorg.conf but no change.

I am probably missing something obvious. Can anyone help?
Author:  nicom [ Sat Jul 28, 2007 6:19 pm ]
Post subject: 
A further development. I have discovered that the problem lies in my TV.

I have been connecting from my KM box to the TV by DVI-I cable. My TV (Fujitsu 42HH) does not have the Wide2 screen setting required for this input. When I try connecting by component cables the aspect ratio is fine but the colour is mauve. More research needed.
Author:  nicom [ Sat Jul 28, 2007 8:18 pm ]
Post subject: 
Colour problem solved by incorporating

Option "TVStandard" "HD1080i"

into the Screen section of the xorg.conf
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