Have you ever wondered, what is happening when your media keys keep flashing?
This means your kernel has some sort of panic 
This happend to me with some sort of strange combination of wlan-access-point and ubuntu-kernel. Whenever i got a new dhcp-lease from this one access-point, my kernel paniced and the last log message was that i got a new IP.
See google for more information on kernel panic reasons!
After the last kernel update, my wlan-led is blinking on traffic, what is quite annoying! And i’m not the only one, as you can see at this bug ticket:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/250211
And although studying computer science i don’t really want to edit and recompile the driver myself. So i was looking for an alternative, and guess what, there is already one, posted at this blog.
Today i found a solution to use both my notebooks display [1440x800] (Dell Vostro 1510 with NVidia 8400M GS) and my flatpanel tft [1280x1024] under Ubuntu 8.04.
This is what my xorg.conf looks like (only the important parts!)
Section “Screen”
Identifier “Default Screen”
Device “nVidia Corporation G80 [GeForce 8400M GS]”
Monitor “Generic Monitor”
DefaultDepth 24
Option “TwinView”
Option “MetaModes” “1440×900 1280×1024″
Option “TwinViewOrientation” “LeftOf”
SubSection “Display”
Modes “1440×1440″
EndSubSection
EndSectionSection “Screen”
# Removed Option “metamodes” “CRT: nvidia-auto-select +1440+0, DFP: nvidia-auto-select +0+0″
Identifier “Screen0″
Device “Videocard0″
Monitor “Monitor0″
DefaultDepth 24
Option “TwinView” “1″
Option “TwinViewXineramaInfoOrder” “DFP-0″
Option “metamodes” “CRT: 1280×1024 +1440+0, DFP: nvidia-auto-select +0+0″
EndSection
This config was partially done using: nvidia-settings (apt-get install nvidia-settings)
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