> On Wed, 29 Jan 2003, hy0 wrote:
>
> > > I've tried everything I can find to get my laptop to shut the LCD
> > > screen and use ONLY the external CRT at 1280x1024. My T30 has a
> > > 1024x768 LCD screen, and this updated radeon driver won't drive the
> > > external CRT greater than 1024x768... This worked fine in XFree86
> > > 4.2.1 w/the "CrtScreen" option. I've tried a multitude of options of
> > > the new Clone... options and the paneloff.
> >
> > There is a small bug in the current CVS code affecting your case. If you
> > have the latest CVS code, you can try to apply attached patch. If you
don't
> > have the source, you can try to change the Modes from
> > Modes "1280x1024"
> > to
> > Modes "1280x1024" "1024x768"
> > in your HomeScreen screen section.
> >
> > Hui
> >
>
> Thanks for the look. However, no joy. With the latest CVS driver
> (1.84) I still get nothing > 1024x768. However, I've come across a
> case where I can get >1024x768, with a different monitor.  The one I
> was first working with was my office monitor, a Sun 20", and this is
> the one that fails. I tried a different monitor at home (an older HP
> A4331D) and it works @ 1280x1024 with that monitor.
>
> I've attached the XF86Config-4 file and the XFree86 log from both
> monitors.
>
> The log with -SUN is the output when attempting to run on the SUN
> monitor; and the other is on the HP monitor. Both used the same
> XF86Config-4 file.
>
> XFree86 4.2.1 radeon driver did work at 1280x1024 on this same Sun
> 20".

Please do both of following things in your config file:
1. Uncomment your CloneHSync, CloneVRefresh lines.
The DDC on your HP monitor worked fine, but it failed on your SUN monitor
somehow.
2. Use Modes "1280x1024" "1024x768" instead of Modes "1600x1200" "1280x1024"
You shouldn't need this if you have the patch I sent to you. Without that
patch you have to make sure you have 1024x768 (your panel's native mode) in
your Modes line.

In v4.2.1, both heads are driven by the same CRTC. That way, while you can
get the external CRT working, it can cause problems on the LCD (lots of
people have complained about it). To get only the external CRT working with
LCD disabled, current driver may appear a little awkward, but it's safer.
There is a better approach to this which has been implemented, but because
we are running out of time testing it for v4.3, it won't appear until after
v4.3.

Hui

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