As mentioned in a previous mail, I am having trouble with a
Rage 128 Pro PF chipset and a Samsung SyncMaster 170T flatpanel.
The problems arise when trying to drive the panel through the DVI output.
I am now of the opinion that the card itself is a Rage Fury Pro (it does
not say on the card, and the box was not purchased by myself) -- I had
originally been informed that it was an Xpert 2000.
Back on 7th May 2001 there was a post explaining how the card appears to lack
a flatpanel BIOS, which causes trouble in various places in r128_driver.c.
By using ProgramFPRegs and patching this file as suggested in that post
I have been able to obtain a display which is partially OK. I am working
on XFree86 4.1.99.1.
Having got that far I am determined to make the thing work properly :)
Upon starting X (with no clients) the display is fine at 1280x1024, with the
exception of a pair of vertical lines about 3/4 of the way across the screen,
and corruption of a few pixels at the bottom between the two vertical lines.
Attempting to start any clients at all causes strange effects -- the left-hand
half of the screen is fine but the right-hand half has corruption and some
mirroring from the left half.
I note that the one parameter which is read from the FP bios which cannot
be overridden is "PanelPwrDelay" (line 596 of r128_driver.c). This
will contain garbage on my system due to that line never being executed --
could someone enlighten me as to whether this is likely to cause display
corruption?
My main question is whether it is possible for me to lay my hands on
any ATI documentation which might help in sorting this out -- how does
the Rage Fury Pro DVI version work under Windows, for example? I presume
there must be some method of getting the required information from the
card, as the parameters themselves (panel width/height, etc) will depend
on the individual panel connected.
Any suggestions would be appreciated -- this is my first attempt at
hacking video drivers!
Mark
--
Mark Shinwell -- http://mrs30.quns.cam.ac.uk/ -- [EMAIL PROTECTED]
Theory and Semantics Group, University of Cambridge Computer Laboratory
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