On Fri, 12 Mar 2010 14:36:07 -0500 (EST), Paul E Condon wrote:
> Wow! Thanks.
You're welcome. I'm glad I could help.
> But I need more help. See below.
> ...
> The log file that you examined was for the Squeeze installation, which
> had no file named /etc/X11/xorg.conf. So, at first, I was wondering
> what else must I put in the file? Surely something that identified a
> Device section, at least. Then I remembered that there was a file,
> /etc/X11/xorg.conf, in the Lenny installation. When I looked at it, I
> realized that it was a skeletal generic xorg.conf file that just
> introduced generic names for required sections.
>
> I put your "Option" line in that, and Lenny went from 1280x768 to the ideal
> 1366x768 !
>
> I copied that file into the Squeeze partition and it also worked there !!!
>
> And !!! we have your wonderful commentary on the /var/log/Xorg.0.log text,
> for study in how to solve X problems by reading the log.
>
> I wonder why there is no generic /etc/X11/xorg.conf installed by
> Squeeze.
X.Org has been working hard for a long time to produce a self-configuring
server. They finally succeeded. The Lenny version still requires manual
configuration of the keyboard and mouse. The Squeeze version is, for
the most part, self-configuring. But even the Squeeze version needs manual
configuration tweaking sometimes.
> And why there is not your magic line pre-configured in
> /etc/X11/xorg.conf in Lenny.
Here is an excerpt from the man page for the savage driver that explains
why UseBIOS defaults to yes.
----------
Option UseBIOS boolean
Enable or disable use of the video BIOS to change modes. Ordinarily,
the savage driver tries to use the video BIOS to do mode switches. This
generally produces the best results with the mobile chips (/MX and /IX),
since the BIOS knows how to handle the critical but unusual timing
requirements of the various LCD panels supported by the chip. To do this,
the driver searches through the BIOS mode list, looking for the mode
which most closely matches the xorg.conf mode line. Some purists find
this scheme objectionable. If you would rather have the savage driver
use your mode line timing exactly, turn off the UseBios option.
Note: Use of the BIOS is required for dualhead operation.
Default: on (use the BIOS).
----------
Since your chipset is not one of the /MX or /IX chipsets, and since
the modeline to use came directly from the monitor itself, I was confident
that we could safely bypass the BIOS and alter the VGA registers directly.
Here is a link to a web page that gives an xorg.conf file for Lenny.
http://www.wowway.com/~zlinuxman/tp600.htm#ConfigX
This is for use in an IBM ThinkPad 600. You can't copy it verbatim,
as it is tweaked for this specific laptop. But it may provide a
useful template for you.
--
.''`. Stephen Powell <zlinux...@wowway.com>
: :' :
`. `'`
`-
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