Ok, I have my LCD which is 1600 x 1200 set up... However, On the very left edge of the screen, the left 25 pixels to be exact... have random white lines that flash all the time... along the entire height of the screen. The rest of it is fine, EXCEPT for if I drag a window so that it is partially off of the screen. I am NOT using a virtual desktop... I have a Dell Inspiron 8000 with an nVidia GeForce2 Go (16 MB).

Here's the appropriate sections from my XF86Config file. I'm using Slackware 9.1 with KDE 3.1. I actually now have 3.1.94, but the problem existed with 3.1.4 also, and is the same in the new KDE...

How do I fix it??


# **********************************************************************
# Monitor section
# **********************************************************************

# Any number of monitor sections may be present

Section "Monitor"
Identifier "Dell1600x1200"
HorizSync 30-100
VertRefresh 60
# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
# HorizSync 30-64 # multisync
# HorizSync 31.5, 35.2 # multiple fixed sync frequencies
# HorizSync 15-25, 30-50 # multiple ranges of sync frequencies

# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

# vendorname "[My Monitor]"
# modelname "[My Monitor]"
# ModeLine "1600x1200" 65 1024 1032 1176 1344 768 771 777 806 -HSync -VSync
vendorname "Dell1600x1200"
modelname "Dell1600x1200"
ModeLine "1600x1200/60Hz" 162 1600 1664 1856 2160 1200 1201 1204 1250 +HSync +VSync
ModeLine "1280x1024/61Hz" 110 1280 1328 1512 1712 1024 1025 1028 1054
EndSection


# **********************************************************************
# Graphics device section
# **********************************************************************

# Any number of graphics device sections may be present

Section "Device"
Identifier "nVidia GeForce2 Go"
Driver "nv"
#VideoRam 16384
# Insert Clocks lines here if appropriate
vendorname "NVidia"
boardname "NV11"
EndSection

# **********************************************************************
# Screen sections
# **********************************************************************

# Any number of screen sections may be present. Each describes
# the configuration of a single screen. A single specific screen section
# may be specified from the X server command line with the "-screen"
# option.

Section "Screen"
Identifier "Default Screen"
Device "nVidia GeForce2 Go"
Monitor "Dell1600x1200"
DefaultDepth 24
Option "ignoreEDID" "1"
# Option "ShadowFB" "on"


SubSection "Display"
Depth 1
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
SubSection "Display"
Depth 4
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
SubSection "Display"
Depth 8
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
SubSection "Display"
Depth 15
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
SubSection "Display"
Depth 16
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
SubSection "Display"
Depth 24
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
SubSection "Display"
Depth 32
Modes
"1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
Virtual 0 0
EndSubSection
EndSection

I also have a Dell I8K, UXGA screen, with Geforce2go. I'm experiencing the same problem you are. The strange thing is I've had some form of Linux on this system for the past ~2.5 years, and I know I didn't used to have this problem.

I'm not sure what is causing this to happen, but I've come up with a temporary solution that works for me. It seems that these horizontal lines (on the left, just like yours) appears if the screen has previously been blanked and it is being activated again. I usually blank the screen when I walk away from the system with Fn-D. When I come back and move the mouse is when the lines appear. If I switch back to a virtual desktop from X (cntl-alt-F1), then switch back to X from there (cntl-alt-F7), the lines go away. They stay away until I blank the screen again.

I have no idea why this happens. I had the LCD replaced about 6 months ago when it died on me -- so maybe that's what made this start happening? I really don't remember exactly when this began.

Anyway -- that doesn't really answer your question, but hopefully it helps. If you (or anyone else) has any more ideas on what's causing this I'd love to hear them.

Guess what!!? I fixed it... I simply installed the nVidia drivers.... worked like a charm. It's taken me this long to get to this because I could never get the nVidia installers to work... then I found instructions on getting to work with the 2.6 Kernel which I am using at www.minion.de. There's a link on there to prepatched installers as well... Hope this helps!