[Openchrome-users] HD resolution problem (EN12000, VT1625)

[Crax]

Hi

I am running a diskless minimyth installation on a VIA EN12000 board. It has output for Component via a YCbCr connection. 

I have been trying to make X display in HD quality (mainly 720p), and with some success, but not 100% (yet).

To use the resolution stated in via_vt162x.h, I had to make a minor change in the header-file, to make X accept the resolution:

 { "1280x720", 1270, 720, TVTYPE_720P, 0, 0,

around line 842 was changed to

 { "1280x720", 1280, 720, TVTYPE_720P, 0, 0,

I don't know if it was intended that it said 1270 or a bug, but at least after a recompile X accepted 1280x720 as a valid 720p resolution.

But my TV screen didn't like it... The image is shown every 2 or 3 seconds and disappears very quick again (no signal). Furthermore the image i shown far too much to the left. When the picture is on, the TV correctly reports it as being 720p!
I suppose it is a timing problem or something similar, but my knowledge in HD is very small.

I have managed to get working ModeLine using PowerStrip, if that can be of any help:

Picture too large for the TV:
"1280x720" 74,453 1280 1304 1352 1648 720 720 736 750 -hsync -vsync

Picture fits perfectly on TV:
"640x480" 25,056 640 1048 1128 1200 480 481 487 545 -hsync -vsync

(The TV is a plasma screen, with a native resolution of 1024x768, but with "support" for 720p and 1080i)

I can compile and test new changes at almost any time, so if any one can help me solve this, I would be very happy!

/Thomas

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://wiki.openchrome.org/pipermail/openchrome-users/attachments/20060913/9dbc6d63/attachment.html