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Dualhead (screen spanning) on ATI radeon 9200 Apple iBook G4
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rhale314159
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Joined: 14 Dec 2003
Posts: 41
Location: East US

PostPosted: Thu Mar 11, 2004 2:17 am    Post subject: Dualhead (screen spanning) on ATI radeon 9200 Apple iBook G4 Reply with quote

Hi!
Has anyone been able to get the dualhead mode (Xinerama, external
monitor) working on a iBook G4 (which uses a radeon mobility 9200)?

I have had partial success. I am able to get a picture on the external
monitor but there are horizontal lines streaking across the right hand side of the laptop screen and the screen colors appear to be garbled.

I know the hardware is capable of supporting a desktop extended across
2 screens since dualhead mode works well under Mac OSX (see
http://rutemoeller.com/mp/ibook/forum/). This includes accelerated 2D
and 3D.
I am using X 4.3.99.902.

Thanx!! :)
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homar
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Joined: 28 Jun 2002
Posts: 94

PostPosted: Thu Mar 11, 2004 4:59 pm    Post subject: Reply with quote

I've hacked together various patches to get dualhead and clone mode working on an ibook g3. The patch is against 4.3.99.902.

http://homepage.ntlworld.com/super_ice/files/ppc/radeon_ibook_dual.diff

and the XF86Config:

http://homepage.ntlworld.com/super_ice/files/ppc/XF86Config-4
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the_accidental
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Joined: 29 Dec 2003
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PostPosted: Thu Mar 11, 2004 5:55 pm    Post subject: Reply with quote

If you try this let me know how you get on, i'm interested in getting this going aswell.
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rhale314159
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Joined: 14 Dec 2003
Posts: 41
Location: East US

PostPosted: Fri Mar 12, 2004 4:42 pm    Post subject: dualhead on radeon 9200 Reply with quote

Hi!
Thank you very much for your suggestion. It works well upto a point. I am
able to get good pictures on both monitors in color now.
However, if I return to one of the text mode terminals or exit X
then the screen is garbled and I have to reboot. If I return to X or
restart X, without rebooting, then I get uniform, 1cm wide, vertical bars
across both monitors.

I''ll double check the code patches tonight. And play around some more.

Thank you
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