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Old 11-21-06, 10:43 AM   #1
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Join Date: Nov 2006
Posts: 1
Default Cannot get 1080i on RPTV

I have a Toshiba 46H83 with a native resolution of 1080i connected to a 6150 (integrated) via DVI. During the mode validation sequence, the nVidia drivers discard all of the 1080 modes and defaults to a 720 mode. I have tried specifying 1080i modelines and using various modevalidation override options, all to no avail.
I have been lurking on this site an many others for about a month now (the 720p still looks good so it has been a low priority) looking for a solution, but no luck yet. It is entirely possible that I am doing something wrong :-)

Attached is my nvidia bug report log.

Thank you for any help,
Attached Files
File Type: gz nvidia-bug-report.log.gz (36.2 KB, 110 views)
gharris is offline   Reply With Quote
Old 11-21-06, 11:08 AM   #2
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Join Date: Dec 2004
Posts: 8,763
Default Re: Cannot get 1080i on RPTV

The problem is here:
(II) NVIDIA(0): Validating Mode "1920x1080":
(II) NVIDIA(0): 1920 x 540 @ 60 Hz
(II) NVIDIA(0): For use as DFP backend.
(II) NVIDIA(0): Mode Source: EDID
(II) NVIDIA(0): Pixel Clock : 74.25 MHz
(II) NVIDIA(0): HRes, HSyncStart : 1920, 2008
(II) NVIDIA(0): HSyncEnd, HTotal : 2052, 2200
(II) NVIDIA(0): VRes, VSyncStart : 540, 542
(II) NVIDIA(0): VSyncEnd, VTotal : 547, 562
(II) NVIDIA(0): H/V Polarity : +/+
(II) NVIDIA(0): Extra : Interlace
(WW) NVIDIA(0): Mode is rejected: VertRefresh (120.1 Hz) out of range
(WW) NVIDIA(0): (59.000-61.000 Hz).

It seems that the EDID has internal conflicts. You can attempt to workaround this with the following option in xorg.conf:

Option "ModeValidation" "NoVertRefreshCheck"

See the driver README for more information.

netllama is offline   Reply With Quote
Old 11-21-06, 12:13 PM   #3
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Posts: 33
Default Re: Cannot get 1080i on RPTV

The driver is misinterpreting the EDID data. See this thread started by another fellow and then continued by me where we were first misunderstood and subsequently ignored. Fortunately, we found a workaround without any help from Nvidia.

Either that or you are just the 97th person to have an RPTV that just 'happens' to send the wrong 1080i EDID data to the driver...

I have my tv working at 1080i now using a ridiculous modeline that shouldn't work in a million years, but somehow does because I was able to find enough switches to make the driver ignore the fact that it's twice the frequency any 1080i tv should accept.
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