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Custom Refresh Rate

post #1 of 7
11/26/08 at 8:50pm
Thread Starter 
I have a chinese LCD which has an incorrect EDID data for its native resolution. It reports 64 hz for 1280x768 when it really is 60Hz. Is there anyway to force this refresh rate in Ubuntu Hardy "a la" powerstrip. ATI control panel shows both refresh rates but it reverts back to 64 every time I select 60, same with ubuntu set resolution utility. Thanks
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post #2 of 7
11/26/08 at 10:47pm
Option "UseEDIDFreqs" "FALSE"
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post #3 of 7
11/27/08 at 4:41am
Thread Starter 
I have read about that line but I've always seen it used with nvidia cards. Does it works with Ati cards as well?
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post #4 of 7
11/27/08 at 1:22pm
Quote:
Originally Posted by Mojonba View Post

I have read about that line but I've always seen it used with nvidia cards. Does it works with Ati cards as well?

Oh, you must be correct. I'm really not sure. I only have nvidia cards.
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post #5 of 7
11/29/08 at 6:26am
not to hijack his thread but I am also wondering how to set custom display settings for ati. In the Powerstrip for Sony setup thread it says for linux set:

Linux modeline parameters:
"1224x688" 79.393 1224 1328 1456 1664 688 733 738 796 -hsync +vsync

how do I do this? I am assuming I need to use aticonfig just don't know how.
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post #6 of 7
11/29/08 at 7:51am
Quote:
Originally Posted by bthessel View Post

not to hijack his thread but I am also wondering how to set custom display settings for ati. In the Powerstrip for Sony setup thread it says for linux set:

Linux modeline parameters:
"1224x688" 79.393 1224 1328 1456 1664 688 733 738 796 -hsync +vsync

how do I do this? I am assuming I need to use aticonfig just don't know how.

While I'll refrain from berating the choice of a Sony display (which nearly ALWAYS have PC connection issues regardless of OS), it shouldn't be anything more than copying/pasting the modeline into the "Monitor" section of /etc/X11/xorg.conf per

http://ubuntuforums.org/archive/inde.../t-614093.html

assuming the ati driver supports those parameters...
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post #7 of 7
11/29/08 at 8:38am
Thread Starter 
rgb:

I have the powerstrip modeline in my xorg.conf but what is happening is that the video card is still outputting to the edid default of 1280x720 but the display area is set to the modeline resolution 1280x768 creating a scrolling desktop. Any idea how to fix this. I would image that the ignoreEDIDfreqs option would work but that's definitely for nvidia cards only.


bthessel:

here's a tutorial i found useful
wilsonet.com/mythtv/mythhd.php
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