one column of pixels missing

[Lei Kong <lei.kong@gmail.com>]

Hi all,

I have sarge running on a dell inspiron 8200.
In kde, I noticed something really weird:
About 1/3 screen width from the right, there 
is one (maybe more) column of pixels missing. 
Whenever I move a window there, I can see contents 
missing in that column, no matter it is text or graphics.
For example, letter "l" appears to be ".", a squre across
that column looks not-so-square, narrower than it is supposed to be.

When it boots into windows, I don't see such a thing,
so it is not a hardware defect, or windows knows how
to handle it by default.

Anyone met similar problems before?

My video card is a Nvidia Gefore2, and the stock nv driver
is used for X11.

The following is my /etc/X11/XF86Config-4:

Section "Files"
	FontPath	"unix/:7100"			# local font server
	# if the local font server has problems, we can fall back on these
	FontPath	"/usr/lib/X11/fonts/misc"
	FontPath	"/usr/lib/X11/fonts/cyrillic"
	FontPath	"/usr/lib/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/Type1"
	FontPath	"/usr/lib/X11/fonts/CID"
	FontPath	"/usr/lib/X11/fonts/Speedo"
	FontPath	"/usr/lib/X11/fonts/100dpi"
	FontPath	"/usr/lib/X11/fonts/75dpi"
EndSection

Section "Module"
	Load	"GLcore"
	Load	"bitmap"
	Load	"dbe"
	Load	"ddc"
	Load	"dri"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"record"
	Load	"speedo"
	Load	"type1"
	Load	"vbe"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"keyboard"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xfree86"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection
Section "InputDevice"
	Identifier	"Generic Mouse"
	Driver		"mouse"
	Option		"SendCoreEvents"	"true"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection

Section "Device"
	Identifier	"Generic Video Card"
	Driver		"nv"
EndSection

Section "Monitor"
	Identifier	"Generic Monitor"
	HorizSync	30-75
	VertRefresh	50-85
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"Generic Video Card"
	Monitor		"Generic Monitor"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1600x1200"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1600x1200"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1600x1200"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1600x1200"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1600x1200"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1600x1200"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	InputDevice	"Generic Mouse"
EndSection

Section "DRI"
	Mode	0666
EndSection