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Old 08-28-09, 09:10 PM   #1
farmerdave
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Join Date: Aug 2009
Posts: 3
Default Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

I have a 1080P Sharp LCD as my monitor, and i am using Slackware 12.2 with the vanilla kernel. This computer is only used for MythTV, but i cannot get 1080p from the GPU. A reboot gives only 1080i @ 50Hz.

Playback appears quite good for scenes which have no movement, but very jittery for any action. This doesn't happen for live broadcasts (not going through pc, direct to LCD).

I tried to find a modeline to correct this using an online calculator, but log files give
Quote:
Error while parsing panning domain in mode description
(WW) NVIDIA(0): "1920x1080@50test+0+0"
Any help greatly appreciated. Attached is nvidia-bug-report.log
Attached Files
File Type: log nvidia-bug-report.log (123.1 KB, 90 views)
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Old 08-29-09, 03:27 AM   #2
Sky777
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Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

please read this useful document
[LINUX] HOW-TO setup XBMC and Linux with correct resolution (xorg.conf)
http://xbmc.org/forum/showthread.php?t=54685

and try this xorg.conf

Code:
Section "ServerLayout"

    Identifier     "Default Layout"

    Screen         "Default Screen" 0 0

    InputDevice    "Generic Keyboard"

    InputDevice    "Configured Mouse"

EndSection



Section "Module"

    Load           "glx"

    Load           "v4l"

EndSection



# To prevent tearing with VDPAU

Section "Extensions"

    Option         "Composite" "Disable"

EndSection



Section "InputDevice"

    Identifier     "Generic Keyboard"

    Driver         "kbd"

#    Option         "CoreKeyboard"

#    Option         "XkbRules" "xorg"

#    Option         "XkbModel" "pc105"

#    Option         "XkbLayout" "us"

EndSection



Section "InputDevice"

    Identifier     "Configured Mouse"

    Driver         "mouse"

    Option         "CorePointer"

    Option         "Device" "/dev/input/mice"

    Option         "Protocol" "ImPS/2"

    Option         "ZAxisMapping" "4 5"

    Option         "Emulate3Buttons" "true"

EndSection



Section "Monitor"

    Identifier     "Philips 9703PFL"

    HorizSync       15.0 - 70.0

    VertRefresh     48.0 - 62.0

    Option         "DPMS"


# 1920x1080p @ 50Hz (EIA/CEA-861B)

    ModeLine "1920x1080@50p" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync

    Option         "ExactModeTimingsDVI" "True"

    Option         "Use EDIDFreqs" "False"

#   Option          "ModeValidation" "NoDFPNativeResolutionCheck"
    Option          "ModeValidation" "NoEdidModes"

EndSection


Section "Device"

    Identifier     "GeForce 8400 PCI "

    Driver         "nvidia"

#    Option         "Coolbits" "1"
     Option         "ModeDebug" "yes"
EndSection



Section "Screen"

    Identifier     "Default Screen"

    Device         "GeForce 8400 PCI"

    Monitor        "Philips 9703PFL"

    DefaultDepth    24

    Option         "UseEvents" "True"

    Option         "TripleBuffer" "True"

    Option         "AllowGLXWithComposite" "True"

    Option         "AddARGBVisuals" "True"

    Option         "AddARGBGLXVisuals" "True"

    Option         "NoLogo" "False"

    Option         "RenderAccel" "True"

    Option         "DPI" "100 x 100"

    Option   "DynamicTwinView" "False"

    SubSection     "Display"

        Depth       24

        Modes       "1920x1080@50p"

    EndSubSection

EndSection
__________________
PCI Sparkle GeForce 8400 GPU G98 A2 512 MB + AMD Sempron(tm) Processor 2800+ + svn Mplayer + xine-vdpau rev. 279 + vdr 1.7.9 & Nvidia 190.25 + XBMC

Last edited by Sky777; 08-29-09 at 03:32 AM. Reason: add
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Old 08-29-09, 06:31 AM   #3
farmerdave
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Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

Thanks for the reply.

I have followed the HOW-TO, and attach the output text file. Every 1920x1080 mode is rejected, and it defaults to 1366768, with tiny fonts.

I have used the xorg.conf you supplied, and tried the modeline it came with. This has given 1080p, according to LCD Display. However, when watching any recording or live tv, it appears like a 70's film clip, with and strobing/ghosting effect on anything that moves. Also, i cannot change the resolutions with nvidia-settings. The X Server Display Configuration says
Quote:
Unable to load X Server Display Configuration page:

Dynamic TwinView is disabled on screen 0.
The desktop and fonts look great with this xorg though!
Attached Files
File Type: bz2 xlog.txt.bz2 (13.1 KB, 89 views)
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Old 08-29-09, 07:57 AM   #4
ercoppa
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Posts: 20
Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

Same problem here with an external monitor LG M227W and Nvidia 9400M. Until 185.14.29 no problems, after every release give me max 1360x1060. I use TwinView.

Distro: ArchLinux (2.6.30) && Ubuntu Jaunty (2.6.29)
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Old 08-29-09, 06:02 PM   #5
farmerdave
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Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

One thing, i did not compile mythtv with VDPAU built in. However, my processor is AMD 4850e which i believe should be more than sufficient to produce high definition playback. But I will ask opinions, would VDPAU make all the difference?
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Old 08-30-09, 06:39 AM   #6
P.Kosunen
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Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

Code:
Section "Screen"
     Option         "FlatPanelProperties" "Scaling = Native"
EndSection
Try to add that FlatPanelProperties option in xorg.conf, after this 1080p might be default mode.

With AMD 4850e you need multi threaded video decoding or VDPAU for smooth playback.
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Old 08-30-09, 12:25 PM   #7
Sky777
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Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

where's it possible to read more details about that option for xorg ?

how does this option work ?
__________________
PCI Sparkle GeForce 8400 GPU G98 A2 512 MB + AMD Sempron(tm) Processor 2800+ + svn Mplayer + xine-vdpau rev. 279 + vdr 1.7.9 & Nvidia 190.25 + XBMC
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Old 08-30-09, 01:46 PM   #8
P.Kosunen
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Default Re: Cannot achieve 1080P on Sharp LC-42D77X with NVIDIA GeForce 8600 GT

Nvidia-settings

It's same as switching off "Force Full GPU Scaling" option in nvidia-settings and open more modes at least with my tv (Panasonic). It's in readme.
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