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From: terry@cs.weber.edu (A Wizard of Earth C)
Subject: Re: patchkit-0.2.2 kernel re-build too big!?
Message-ID: <1993Mar29.232415.25961@fcom.cc.utah.edu>
Sender: news@fcom.cc.utah.edu
Organization: Weber State University (Ogden, UT)
References: <C4GAGv.JxF@sleeper.uucp> <C4GB2M.K0H@sleeper.uucp>
Date: Mon, 29 Mar 93 23:24:15 GMT
Lines: 52
In article <C4GB2M.K0H@sleeper.uucp> quentin@sleeper.uucp (Quentin Conner) writes:
>
>ONE MORE QUESTION (along another line):
>I am using the stock pccons driver and X386 1.2.
>When I exit X, my display is hosed up.
>It works, but looks like the Character Font is overwritten
>and each character is a collection of vertical lines. I
>also can't run my car in 800x600 mode. 630x480 works. It
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>is an older ATI VGA wonder 512K I think. Under dos it will
>display 800x600x256. xinit before editing Xconfig said it
>was a V5 card...
Buy a Porsche Carerra or BMW 325i; they run fine in 800x600 mode. 8-). 8-).
Seriosly, it's likely that DOS uses a special driver or BIOS call to set
dot clocks to other than the default value. Failure to do this will result
in your dot clocks being high enough frequency to support the resoloution,
but not matching the monitor frequency at the same time.
To get higher resoloutions requires the monitorr to be driven at a
frequency that can support the resoloution that also matches one of the dot
clocks. This is why the default Dell video and Dell monitors shipped with
most Dell systems support high resoloutions in DOS but not in Dell UNIX.
Soloutions:
1) Different monitor with freqs to match the video card.
2) Diferent video card with default freqs to match the monitor.
3) Software callable by XFree86 that sets the dot clocks to the
desired values (requires support of manufacturer to directly
access hardware registers and know what you are doing).
4) Don't run HiRes.
The character set screw-up is one I've seen with ATI cards before. ATI
will replace the card (they did for me) if it's not surface-mount
components (ie: it's an older, slower card)... it's a well-known memory
speed problem with ancient ATI cards.
Terry Lambert
terry@icarus.weber.edu
terry_lambert@novell.com
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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