[ltp] R51 display resolution

[Takis Diakoumis]

Hi

i'm trying to configure my display resolution at something greater than
1024x768. i have a R51 2887 running debian. the display chip is the
intel 855GM. 

i have checked the ibm website and have found drivers for windows that
supports upto 2048x1536 and same for the lcd - info is at:
(http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-58208&velxr-layout=printLenovo)

so that confirms (??) that it can be done. problem is that X only gives
me upto 1024x768. even when i add the relevant lines to XF86Config-4 for
1280x1024 they seem to be ignored. indeed, using the 855resolution
utility it reports that the chip can do upto 1920x1440. i figure i must
have something incorrectly configured.

has anyone been able to achieve a resolution greater than 1024x768 for
an r51 (or close relative) with the intel 855 chip???

relevant sections from my XF86Config-4 are below.

any suggestions would be appreciated.
thanks

Takis

/etc/X11/XF86Config-4

Section "Device"
	Identifier	"i855GM"
	Driver		"i810"
	BusID		"PCI:0:2:0"
EndSection

Section "Monitor"
	Identifier	"Generic Monitor"
	HorizSync	30-60
	VertRefresh	50-60
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"i855GM"
	Monitor		"Generic Monitor"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
	EndSubSection
EndSection