Hi all,
this is my first post here, please be patient! I can't figure out to solve my problem:

I've an Ubuntu Feisty Fawn with an ATI Radeon 9700 pro AIW that is hooked to an Epson Tw-600 projector via HDMI cable.
I'm not able to get 50Hz output (i'm from Europe so i need to support PAL standard!)
There must be something wrong with my EDID data because i'm only able to choose between 1280x720 and 640x480 resolutions both of them at 60Hz and nothing more.

I tried to put an Option "IgnoreEDID" "true" but i'm not able to create a working Modeline . I tried using xtiming script
and tried to wirte modeline by myself reading EDID data from Xorg.0.log
but desktop comes all messed up (bad cursos, messed wallpaper,...)


Please give me an hint ...
TIA

PS I tried to attach xorg.conf and Xorg.0.log but this forum is complaining about spam and URL links ...

can someone hint me?
I've to reach 5 posts to posto you my logs ... if you need more information please ask me.
thanks

Unfortunately, I'm afraid I can't really help you. I'm surprised that you can get any output at all, since all modern ATI video cards have poor (or none) support in Linux. Does your 9700 Pro support 50Hz (under Windows)? The basic problem is to get Linux drivers (3rd party) installed under Ubuntu Feisty.

I'm assuming that your Linux box is running at 50Hz, as is your TW-600.

I hope some of our EU experts will read your thread and jump in to help. You might try the Ubuntu forums, or the MythTV forums (assuming you are running MythTV).

Thanks for your help,
I'm only getting 60Hz output but not 50Hz.
I'm using open source drivers and not ATI's proprietary one. I'd like to keep open source drivers to use 3d-desktop effects (using AIGLX extension instead of XGL).

Yes windows supports 50Hz output

thanks again

By the way, your 2 posts on almost identical subjects is very confusing. I wasn't aware that the ATI AIW 9700Pro had open-source drivers. That's good news.

Now you have my curiosity aroused. If your PC runs at 50Hz, I don't see why you can't get your ATI card to output at 50Hz (especially if you can get 50Hz operation in Windows). It almost sounds like the card is re-clocking the signal to 60Hz.

There should be a setting in the open-source driver for 50Hz operation. I think you need to look into that aspect of the driver code.

Yes there are opensource dirvers called 'radeon' or 'ati' they are included into xorg. They work quite well but still under hard development.

I think my problem is that my projector send incorrect EDID data to my radeon. This means that my card knows only few modeline available and all of them are 60Hz output based modeline.

i tried to disable EDID and create my own modeline using this script:
http://xtiming.sourceforge.net/cgi-bin/xtiming.pl
but it mess up my desktop ...

i think i should work on modelines to achieve 50hz output but i need suggestions

thanks

Have you tried xvidtune ?

http://www.xfree86.org/current/xvidtune.1.html
http://howto-pages.org/ModeLines/

With xvidtune you can try different parameters to find the right one and then copy it to the Monitor section of xorg.conf.

It's not possible to tune vertical refresh directly, but you can get 50Hz by attempts, varying other parameters.

This calculator may be useful:
http://www.tkk.fi/Misc/Electronics/faq/vga2rgb/calc.html

Michele

Thanks Mike5
I did the trick with xvidtune but i had to switch from DVI to RGB-HV (vga analog output) to get 50Hz output, now, IT'S SMOOTH...

PS: Sorry for my delayed answer, quite busy this period