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Old 02-24-07, 02:09 AM   #1
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Join Date: Feb 2007
Posts: 2
Default Twin and different resolution for TV


I've been trying to get my TV connected to my Dell laptop (GeForce 7900S) using TwinView. My desktop resolution is at 1920x1200 and my TV is at 1024x768. The problem is no matter what I do I cannot seem to get the TV ton run at 1024x768 so the TV only displays a partial view of the screen.

The relevant section of my xorg.conf is:

Section "Monitor"
        Identifier   "Monitor0"
        HorizSync    28.0 - 96.0
        VertRefresh  50.0 - 75.0

Section "Device"
        Identifier  "Card0"
        Driver      "nvidia"
        VideoRam    262144
        VendorName  "All"
        BoardName   "All"
        Option      "RenderAccel" "true"
        Option      "CursorShadow" "on"
        Option      "TwinView"
        Option      "TwinViewOrientation" "DFP-0 RightOf TV-0"
        Option      "MetaModes" "1920x1200,1024x768"
        Option      "TVStandard" "PAL-G"
        Option      "TVOutFormat" "SVIDEO"
        Option      "TVOverScan" "0.6"
        Option      "ConnectedMonitor" "DFP-0, TV-0"
#       BusID       "PCI:1:0:0"

Section "Screen"
        Identifier      "Screen0"
        Device  "Card0"
        Monitor "Monitor0"
        DefaultDepth 24
        DefaultColorDepth 24
        SubSection "Display"
                Depth   24
                Modes "1920x1200" "1600x1200" "1024x768" "800x600" "640x480"
        SubSection "Display"
                Depth   32
                Modes "1920x1200" "1600x1200" "1024x768" "800x600" "640x480"
The relevant lines from Xorg.0.log are:

(II) Module glx: vendor="NVIDIA Corporation"
(II) Module nvidia: vendor="NVIDIA Corporation"
(II) NVIDIA dlloader X Driver  1.0-9746  Fri Dec 15 10:21:43 PST 2006
(II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
(--) Chipset NVIDIA GPU found
(**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(0): RGB weight 888
(==) NVIDIA(0): Default visual is TrueColor
(==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
(**) NVIDIA(0): Option "ConnectedMonitor" "DFP-0, TV-0"
(**) NVIDIA(0): Option "TVStandard" "PAL-G"
(**) NVIDIA(0): Option "TVOutFormat" "SVIDEO"
(**) NVIDIA(0): Option "RenderAccel" "true"
(**) NVIDIA(0): Option "CursorShadow" "on"
(**) NVIDIA(0): Option "TwinView"
(**) NVIDIA(0): Option "TwinViewOrientation" "DFP-0 RightOf TV-0"
(**) NVIDIA(0): Option "MetaModes" "1920x1200,1024x768"
(**) NVIDIA(0): Option "TVOverScan" "0.6"
(**) NVIDIA(0): Enabling RENDER acceleration
(**) NVIDIA(0): Forcing SVIDEO output
(**) NVIDIA(0): Enabling cursor shadow
(**) NVIDIA(0): TV Standard string: "PAL-G"
(**) NVIDIA(0): TwinView enabled
(**) NVIDIA(0): ConnectedMonitor string: "DFP-0, TV-0"
(II) NVIDIA(0): NVIDIA GPU GeForce Go 7900 GS at PCI:1:0:0 (GPU-0)
(--) NVIDIA(0): Memory: 262144 kBytes
(--) NVIDIA(0): VideoBIOS:
(II) NVIDIA(0): Detected PCI Express Link width: 16X
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(--) NVIDIA(0): Connected display device(s) on GeForce Go 7900 GS at
(--) NVIDIA(0):     PCI:1:0:0:
(--) NVIDIA(0):     NVIDIA TV Encoder (TV-0)
(--) NVIDIA(0):     Seiko (DFP-0)
(--) NVIDIA(0): NVIDIA TV Encoder (TV-0): 400.0 MHz maximum pixel clock
(--) NVIDIA(0): TV encoder: NVIDIA
(II) NVIDIA(0): Assigned Display Devices: DFP-0, TV-0
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0):     "1920x1200,1024x768"
(II) NVIDIA(0): Virtual screen size determined to be 2944 x 1200
(II) NVIDIA(0): Primary V_BIOS segment is: 0xc000
(--) NVIDIA(0): DPI set to (131, 132); computed from "UseEdidDpi" X config
(--) NVIDIA(0):     option
(II) NVIDIA(0): Setting mode "1920x1200,1024x768"
(II) NVIDIA(0): NVIDIA 3D Acceleration Architecture Initialized
(II) NVIDIA(0): Using the NVIDIA 2D acceleration architecture
(==) NVIDIA(0): Backing store disabled
(==) NVIDIA(0): Silken mouse enabled
I've been going back and forth with different configuration settings for hours now. Is there anything that I am missing? I am using KDE but do not yet have it compiled with xinerama support though from my understanding this shouldn't affect the screen resolution of the TV?

Any help would be very appreciated.

grantonstar is offline   Reply With Quote
Old 02-24-07, 03:31 AM   #2
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Join Date: Aug 2003
Posts: 1,026
Default Re: Twin and different resolution for TV

What would you expect to get instead of what you get now?

The virtual desktop is the smallest rectangle containing the 1920x1200 and the 1024x768 screen. *of course* this leaves an area that is unreachable. You can only avoid this when the two screens have the same height.
There are options to make the TV scroll through that area.
You can also setup two separate screens, each at the correct resolution, instead of twinview.
pe1chl is offline   Reply With Quote
Old 02-24-07, 03:52 AM   #3
Join Date: Jul 2002
Location: Netherlands, Europe
Posts: 2,105
Default Re: Twin and different resolution for TV

Xinerama support is very important. I guess you want to use the TV for movie playback. When you have xinerama support in and you press the 'maximize' button on a application window (a window on the TV) it will maximize to the full resolution of the TV. Various movie players and so also support this when using the fullscreen option.
Thunderbird is offline   Reply With Quote
Old 02-26-07, 10:51 PM   #4
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Join Date: Feb 2007
Posts: 2
Default Re: Twin and different resolution for TV

Thanks for both replies. Seems like I got myself confused because i did not have xinerama support built in to xorg and KDE. That has seemed to resolve almost all my issues except for video playback.

video playback using vlc, mplayer, kaffeine, xine etc. is a little choppy on the second screen (at least not as smooth as it is on Windows). Is there anything I am missing in my xorg.conf that could improve this?

Also, vlc maximises to DFP-0 and not TV-0 when I select fullscreen even though it has xinerama support compiled in.

grantonstar is offline   Reply With Quote

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