[mythtv-users] Sharp LC-42D64U and xorg

[Tim Shannon]

The first thing I would try is commenting out this line in your xorg

Option         "ExactModeTimingsDVI" "True"

I've heard some people can't get their display working with that on.

On Mon, Sep 15, 2008 at 10:40 AM, Erik Sejr <esejr at wildroseinternet.ca>wrote:

> Hi,
> I have had MythTV up and running at 1080p on the older sharp 42" LCD but I
> recently moved and purchased a new LC-42D64U since I liked my old unit.
> When I first booted up my Myth machine connected to this new TV it seemed
> to just lock up. Upon closer inspection I found I was able to boot into
> text mode ok, the problem only seemed to happen when the system tried to
> start the X server. It seems when X tries to initialize the display it just
> locks up. If I try to start X at 1920x1080 I get a black screen on the
> display and the system doesn't appear to load X. Control-Alt-Backspace does
> not get me back to the prompt - I have to reboot. If I start it at a lower
> resolution (say 640x480) I get the same thing on the screen (nothing) but I
> CAN use control-alt-backspace to kill X and return to the prompt. Also,
> based on the hard disk activity and messages after killing the server, X
> appears to load normally at this resolution but the display remains black.
>
> I read the EDID information from the using monitor-edid (This machine is
> running Fedora 7):
>
> Name: SHARP HDMI
> EISA ID: SHP0ffb
> Screen size: 82.0 cm x 46.0 cm (37.02 inches, aspect ratio 16/9 = 1.78)
> Gamma: 2.2
> Digital signal
> Max video bandwidth: 170 MHz
>
>        HorizSync 15-75
>        VertRefresh 55-76
>
>        # Monitor preferred modeline (60.0 Hz vsync, 67.5 kHz hsync, ratio
> 16/9)
>        ModeLine "1920x1080" 148.5 1920 2008 2052 2200 1080 1084 1089 1125
> +hsync +vsync
>
>        # Monitor preferred modeline (60.0 Hz vsync, 47.7 kHz hsync, ratio
> 16/9)
>        ModeLine "1360x768" 85.5 1360 1424 1536 1792 768 771 777 795 +hsync
> +vsync
>
> Here's the pertinent sections of xorg.conf:
>
> Section "Screen"
>
>    Identifier     "Screen0"
>    Device         "Videocard0"
>    Monitor        "Monitor1"
>    DefaultDepth    24
>    Option         "Connected Monitor" "DFP"
>    Option         "ExactModeTimingsDVI" "True"
>    SubSection     "Display"
>        Viewport    0 0
>        Depth       24
>        Modes      "1920x1080"
>    EndSubSection
> EndSection
>
> Section "Monitor"
>    Identifier     "Monitor1"
>    VendorName     "Sharp"
>    ModelName      "42 Inch 1080p LCD HDTV"
>    HorizSync       15.0 - 75.0
>    VertRefresh     55.0 - 76.0
>    ModeLine       "1920x1080" 148.5 1920 2008 2052 2200 1080 1084 1089
> 1125 +hsync +vsync
>    Option         "DPMS" "True"
> EndSection
>
> Section "Device"
>    Identifier     "Videocard0"
>    Driver         "nvidia"
>    VendorName     "Videocard vendor"
>    BoardName      "nVidia Corporation C51 PCI Express Bridge"
> EndSection
>
> The video card is a Geforce 6150, Nvidia driver is version 173.14.05. The
> monitor is connected via a DVI->HDMI cable. I ran startx -- -verbose 5
> -logging 5. The log is too big to post and will make a mess of this
> message, but here are the interesting parts that I believe may be the cause
> of this problem:
>
> (II) NVIDIA(GPU-0): No display devices connected; falling back to: CRT-0
> (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
> (II) NVIDIA(0): NVIDIA GPU GeForce 6150 (C51) at PCI:0:5:0 (GPU-0)
> (--) NVIDIA(0): Memory: 262144 kBytes
> (--) NVIDIA(0): VideoBIOS: 05.51.22.33.07
> (--) NVIDIA(0): Interlaced video modes are supported on this GPU
> (--) NVIDIA(0): Connected display device(s) on GeForce 6150 at PCI:0:5:0:
> (--) NVIDIA(0):     CRT-0
> (--) NVIDIA(0): CRT-0: 350.0 MHz maximum pixel clock
> (II) NVIDIA(0): Assigned Display Device: CRT-0
> (II) NVIDIA(0): Validated modes:
> (II) NVIDIA(0):     "800x600"
> (II) NVIDIA(0): Virtual screen size determined to be 800 x 600
> (WW) NVIDIA(0): Unable to get display device CRT-0's EDID; cannot compute
> DPI
> (WW) NVIDIA(0):     from CRT-0's EDID.
> (==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
> (==) NVIDIA(0): Enabling 32-bit ARGB GLX visuals.
> (--) Depth 24 pixmap format is 32 bpp
>
> Why can't it seem to find the display even when it is plugged in and
> operating in text mode? Any thoughts on how to get around this? Has anyone
> got Myth working on this TV? If so I'd love to have a look at your
> xorg.conf.
>
> Your help is greatly appreciated.
>
> Regards,
> Erik
>
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