I suspect there is a "standard" for 1080i, but I haven't been able to dig it up.Thanks for the replies, the problem is, I can't find specs beyond: supports 1920x1080i and 720x480 and vertical refresh of 59.94.
If I have this working modeline, can't I reverse the math the modeline generators do and find the specs?
Yes, but there's no guarantee that what "works" is correct.
Also, the EDID info from the TV (in Xorg.0.log) said the following: VertSync: 59 - 61 HorizSync: 15 - 34
There's more to a resolution than H and V frequencies. That's the most important part, but other parts include the sync duration, polarity, and front/back porch duration/location. The last one isn't quite as important since it'll just move the active picture around... at least the raster will be correct.
Many of the modelines I try say "VertSync out of range", then later say that that modeline is not found. If I turn off DDC, EDID, DPMS, the out of range error goes away, but the modeline still shows up as not found.
... and is defeating the safety checks of X. The whole point of putting HorizSync and VertRefresh in the xorg.conf file is so that it won't try to use modes that the "monitor" can't do. If you override that willy-nilly, you can quite possibly damage your "monitor." On some TV's, the EDID identifies itself improperly and will need to be disabled if connected directly digitally. In those cases, make sure that the settings you are using are correct.
issue "xrandr -s 1" from a terminal window and it switches to the good one.
... or us old-school folks will hit ctrl-alt-[+-] on the numerical keypad to switch between resolutions.
Do yourself (and your TV) a favor and find the *real* specs for the system. Just because a modeline works and drives the TV the way you like doesn't mean you aren't damaging it. I screwed up an old monitor driving it too fast, even though it appeared to work fine. I'd be quite pissed if it were a very expensive TV rather than a disposable ancient Apple monitor.Anyone have an idea as to whether I can use a different DVI-equipped Windows PC to test my modelines, or must it be with the videocard from the Mythbox?
-Cory
************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
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