[mythtv-users] Video sync not working in TV out

[Owen B. Mehegan]

OK, I found another symptom of my problem. I think this is the root of  
it. My /var/log/Xorg.log.0 has the following:

(--) NVIDIA(0): Connected display device(s) on GeForce FX 5200 at PCI: 
1:0:0:
(--) NVIDIA(0):     SONY TV (DFP-0)
(--) NVIDIA(0): SONY TV (DFP-0): 135.0 MHz maximum pixel clock
(--) NVIDIA(0): SONY TV (DFP-0): Internal Single Link TMDS
(II) NVIDIA(0): Mode Validation Overrides for SONY TV (DFP-0):
(II) NVIDIA(0):     NoEdidModes
(II) NVIDIA(0): Assigned Display Device: DFP-0
(WW) NVIDIA(0): No valid modes for "720p"; removing.
(WW) NVIDIA(0):
(WW) NVIDIA(0): Unable to validate any modes; falling back to the  
default mode
(WW) NVIDIA(0):     "nvidia-auto-select".
(WW) NVIDIA(0):
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0):     "nvidia-auto-select"
(II) NVIDIA(0): Virtual screen size determined to be 640 x 480
(WW) NVIDIA(0): SONY TV (DFP-0)'s EDID does not contain a maximum  
image size;
(WW) NVIDIA(0):     cannot compute DPI from SONY TV (DFP-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

That seems to indicate that, for some reason X doesn't like my custom  
modeline (quoted below). As I mentioned earlier, this exact config DID  
work with this card and monitor, up until I upgraded my system with a  
new Debian, Xorg, and Nvidia drivers. So, why is my formerly-good  
modeline not acceptable anymore?

On May 18, 2008, at 8:27 PM, Owen B. Mehegan wrote:

> That doesn't seem to be it. Force Full GPU Scaling is not checked,
> checking it changed nothing. Neither did changing the GPU Scaling
> Method to either of the other two options.
>
> I notice that the nvidia-settings tool sees that the screen resolution
> is set to 640x480, and it seems to know that my TV is widescreen (if
> that's the meaning of the grey box that surrounds the smaller box
> labeled 640x480). But I can't set a different/higher resolution
> anywhere in the tool or elsewhere in the system settings.
>
> When I set up X on this TV before, I had to do a lot of digging online
> before I found some modeline settings that someone else worked out,
> which worked for my TV. I'm not sure if nowadays there's an easier way
> to do this. I think this TV is fairly "dumb," not like the LCD and
> plasma displays that are basically just big computer monitors. This is
> the relevant section of my xorg.conf:
>
> Section "Monitor"
>     Identifier     "Monitor0"
>     VendorName     "Sony"
>     ModelName      "HDTV"
>     HorizSync       33.8 - 33.8
>     VertRefresh     59.9 - 59.9
>     Mode "720p"
>     DotClock 37.26
>     HTimings 960 976 1008 1104
>     VTimings 540 542 548 563
>     Flags "+HSync" "+VSync"
>     EndMode
> EndSection
>
> I think I just need to get X to run the right resolution. But these
> settings used to work!
>
> On May 18, 2008, at 5:25 PM, James M. MacLaren wrote:
>
>> I had something similar after upgrading to mythbuntu 0.84.
>> I found that running nvidia-setting I had under the GPU 0 settings
>>
>> flat panel scaling
>> force full gpu scaling checked, unchecking that fixed the problem
>> I also checked gpu scaling method centered.
>>
>> Hope this helps
>>
>>
>> James
>>
>>
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