Re: external crt on i855 laptop

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On Thursday 05 February 2004 08:49, L. Jensen wrote:
> I want to be able to use an external monitor with an Asus M3N laptop with
> i855 chipset and integrated 64MB Intel graphics.
[snip]
> 1) The FnF8 key is supposed to toggle between lcd, lcd+crt, crt.  For me it
> switches between lcd-only and crt-only but is never usable (even switching
> back: lcd->crt->lcd).  In the best case the desktop is displayed below a
> band of noise at the top of the screen and with its bottom cut off.  Other
> times the whole display is a mess. Switching to another vt and back will
> restore the display to good condition on the lcd.

I am getting the same effect running XFree86 4.3.99.302 compiled from source 
on Gentoo Linux. The hardware is a Dell Inspiron 1100 laptop with an Intel 
i845GL graphics controller. I am using Christian Zietz's "845patch" program 
(http://www.chzsoft.com.ar/855patch.html) to allocate 32 MB of main memory 
for graphics purposes.

When I use the Fn-F8 key combination to switch between the on-board LCD and 
the external monitor on the VGA port, the entire display moves down by about 
50 pixels, and the upper band of the screen is filled with garbage. The mouse 
cursor doesn't move with the screen contents, leaving it out of vertical 
sync. Switching to a text console (Ctrl-Alt-F1) and back (Alt-F7) restores 
the display to normal.

-- 
Lieven Buts
Department of Ultrastructure
Vrije Universiteit Brussel

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