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Re: external crt on i855 laptop



Ship along your log from /var/log/XFree86.0.log

and your config.

Alan.


On Thu, Feb 05, 2004 at 02:49:44AM -0500, 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.  The laptop has a SXGA+ 1400x1050 
> lcd, but so I still cannot use that resolution.  I have still been unable to 
> get an acceptable display on an external monitor, and I hope someone here can 
> help.  Here is what I have tried so far.
> 
> 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.
> 
> 2) There is a tool called i810switch which writes to a location in /dev/mem.  
> This successfully activates the external crt when it is attached.  
> Unfortunately the display is out of focus and some monitors report the signal 
> as out of range.  The tool can turn off the monitor too, but cannot activate 
> the lcd on an i855.
> 
> 3) The asus_acpi project provides a kernel module and /proc interface.  
> Reading from /proc/asus/acpi/disp should give a number related the current 
> display state, and writing to the file should change the state.  Remarkably, 
> a simple read of the file will distort the lcd by putting the band of noise 
> at the top of the display.  Nothing I write to the file has any affect.
> 
> 4) I thought I might configure XF86 to drive the external display in the 
> config file, but the few things I tried failed.
> 
> Any ideas how to get this to work?  If #4 has a chance and you want to see my 
> config, just ask.  BTW, of course I suffer from the unavailability of 
> 1400x1050 in the BIOS, so I am using 1280x1024 for now.  I really would like 
> to solve that problem too.
> 
> Thank you very much,
> -- L
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