I need some clarification information on modelines in the /etc/X11/XF86Config-4 file.

How does KnoppMyth select the output resolution when there are multiple resolution listings in the Config-4 file?
I see that there are 3 screen resolutions currently listed for each bit depth of the LCD monitor that I've been testing the setup with:



I found a webpage of "standard" HDTV modelines and I'm going to try a couple of the 1920x1080 interlaced modelines:
http://www.linuxis.us/linux/media/howto ... ation.html

If I add a modeline to the Config-4 file for a "ATSC-1080-59.94i" output, and then add a resolution reference called "ATSC-1080-59.94i" to the SCREEN section of the Config-4 file, how will KnoppMyth know which screen resolution to pick?

For example:


After I safely understand modelines and how to select output resolutions, I want to send the 1080i signal out the VGA connector to a Sony 1270Q projector. I currently feed that same projector with an RCA DTC-100 HDTV receiver and it works fine. The 1080i signal frequencies from the DTC-100 are 33.6 kHz horizontal and 59.9 Hz vertical.

Eric

_________________
KnoppMyth R5.5, Asus A8N-VM CSM (nvidia 6150 onboard video), AMD Athlon 64 dual-core 4200+, two 1GB sticks DDR 400, HD-3000 HDTV card, PVR-150 card, Iguanaworks RS-232 IR receiver/transmitter, Pioneer DVR-110 DVD burner

It will use the first resolution listed if possible, and fall back to the others if it can't use the first one for some reason.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

How will KnoppMyth know if it can't use your #1 resolution choice and need to fall back to #2 or #3? Does it get this feedback from the monitor?

Can a person change the output resolution of KnoppMyth while you are using it?

Does changing the theme/look in KnoppMyth (to the widescreen 16x9 theme, for example) change the output resolution of KnoppMyth?

Eric

_________________
KnoppMyth R5.5, Asus A8N-VM CSM (nvidia 6150 onboard video), AMD Athlon 64 dual-core 4200+, two 1GB sticks DDR 400, HD-3000 HDTV card, PVR-150 card, Iguanaworks RS-232 IR receiver/transmitter, Pioneer DVR-110 DVD burner

X runs some checks to see if anything is out of range it will tell you in the X log.

not with a menu command or anything, but you can use xrandr to change the resolution, and there are some settings for this in mythtv settings.

no

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

Holy smokes, the picture out of the projector is BIG and beautiful!
Live HDTV looks good and so does HDTV playback.

I tried both of these modelines and both worked with no editing!

ModeLine "ATSC-1080-59.94i" 74.176 1920 1960 2016 2200 1080 1082 1088 1125 Interlace -hsync -vsync
ModeLine "ATSC-1080-60i" 74.25 1920 1960 2016 2200 1080 1082 1088 1125 Interlace -hsync -vsync

I tested with a Samsung 19 inch crt computer monitor first - both worked.
Then I tested with a Mitsubishi HC3000U DLP projector - both worked, but had some motion artifacts. I'll see if I can find the PERFECT modeline.

Thanks for the modefile info!
Eric

_________________
KnoppMyth R5.5, Asus A8N-VM CSM (nvidia 6150 onboard video), AMD Athlon 64 dual-core 4200+, two 1GB sticks DDR 400, HD-3000 HDTV card, PVR-150 card, Iguanaworks RS-232 IR receiver/transmitter, Pioneer DVR-110 DVD burner

I did a lot of experimenting for the perfect modeline for the Mitsubishi HC3000u projector. This one seems perfect - with all pixels displayed and full framerate video with no jerking and no scaling artifacts:



The native resolution of the DLP image chip in this is 1280x768 so the 720p modelines weren't perfect and the 1080i modelines weren't perfect either. Both had motion artifacts (framerate problems).

I used the following website to play with pixel clock rates, and resolutions to achieve all the image pixels up on the screen while maintaining a verticle scan rate of 59.94 Hz.
http://www.tkk.fi/Misc/Electronics/faq/ ... /calc.html

Enjoy!
Eric

_________________
KnoppMyth R5.5, Asus A8N-VM CSM (nvidia 6150 onboard video), AMD Athlon 64 dual-core 4200+, two 1GB sticks DDR 400, HD-3000 HDTV card, PVR-150 card, Iguanaworks RS-232 IR receiver/transmitter, Pioneer DVR-110 DVD burner