Forcing the vesa driver, how?
Gene Heskett
gene.heskett at gmail.com
Thu Sep 9 21:22:17 PDT 2010
Greetings all;
I have now installed ubuntu-10.04 LTS on my old box that runs my milling
machine, and its a disaster in terms of speed compared to 6.06.
One thing that is a given is that I must use the vesa driver because all
the others, including the radeon driver from the 10.04 install, do not seem
to share interrupts well, or some such, causing 'unexpected realtime
delays' of as much as 2 milliseconds, intolerable in a system driving
stepper motors step by step.
This application uses the RTAI facilities to run the machine in real time,
and that works. However my screen updates are at about 1.5 second
intervals, and the position shown for the machines cutting tool is often as
much as 5 seconds behind the machine.
The vesa driver (its an ATI-9200SE card) will actually be considerably
faster in this application. Its 'realtime delays' are about 1/5th those of
the radeon driver.
So, since there is not an /etc/X11/xorg.conf file now, how do I force x to
use the vesa driver at its optimum settings?
Thanks.
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Luck, that's when preparation and opportunity meet.
-- P.E. Trudeau
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Bus error -- driver executed.
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If he had only learnt a little less, how infinitely better he might have
taught much more!
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