Some months ago I enterd a question about the impossibility to activate
DPMS on flat panels with radeon VE.
Unfortunately no definite answer was given to the question.
Now, I received by mail an interesting suggestion from Prof. Jaijeet
Roychowdhury.
His suggestion, as you'll read, requires a little modification of the
source code of Xfree.
Now I do nomore have xfree tree on my machine, and no time at all. If
someone of you is able to verify it, it would be a wonderful thing.
Here it is:
I found a post by you on the Xpert mailing list about DPMS not
working with a Radeon card and flat panel displays. I had a similar
problem
that I was able to fix by a small change to the XFree86 4.2.0 source
code.
(For me, DPMS stopped working on the CRT when I connected the Svideo
output
of my Radeon VE to a TV).
The file to change is:
xc/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c in the
XFree86
4.2.0 code. I changed line 2869 to:
if ((info->DisplayType == MT_CRT) || (info->UseCRT))
from the original:
if (info->DisplayType == MT_CRT)
The original code seems to initialize DPMS only if the first display it
detects is a CRT. If you want DPMS on a flat panel or LCD, I suspect
something
like
if ((info->DisplayType == MT_CRT) || (info->DisplayType ==
MT_DFP)
|| (info->DisplayType == MT_LCD))
will work.
Compiling these changes will only affect radeon_drv.o, which can then be
copied to /usr/X11R6/lib/modules/drivers/.
Please feel free to post this on the Xpert mailing list if it works.
Best wishes,
Jaijeet Roychowdhury
--
Saluti - Marco Coli
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