I think i've got a solution which can resolve several problems without edit any files. (Ubuntu 10.10)
So if you have problems with backlight settings, usb power (like usb mouse disconnections every 5 seconds) or issues to wake up your netbook after sleep mode (not hibernate mode), please read this.
I have found a solution on the french ubuntu forums for sleep mode issues. ( http://forum.ubuntu-fr.org/viewtopic.php?id=422616&p=1
- nicolas06600 - #20)
But i have tested this solution for other problems (backlight) and it works with samsung-tools. Moreover, it seems to fix issues with USB power.
You have to download 2.6.34 Linux Kernel and use it instead of Voria modified Kernel. You can keep Samsung-tools. (Old stable Kernel used with Ubuntu 10.04 Lucid Lynx)
You have to know that i've undone all the modifications on several files before testing the kernel. (these file modifications : viewtopic.php?f=3&t=625&p=4747#p4747
So if you want to test 2.6.34 kernel (32 bit), download and install these files in this order :http://kernel.ubuntu.com/~kernel-ppa/mainline/v18.104.22.168-maverick/linux-headers-2.6.34-02063407_2.6.34-02063407.201009140905_all.debhttp://kernel.ubuntu.com/~kernel-ppa/mainline/v22.214.171.124-maverick/linux-image-2.6.34-02063407-generic_2.6.34-02063407.201009140905_i386.debhttp://kernel.ubuntu.com/~kernel-ppa/mainline/v126.96.36.199-maverick/linux-headers-2.6.34-02063407-generic_2.6.34-02063407.201009140905_i386.deb
If you have Ubuntu 64 bit : http://kernel.ubuntu.com/~kernel-ppa/mainline/v188.8.131.52-maverick/
(Take "amd64" (both) and "all" )
You may need to edit grub to make 2.6.34 kernel as your default kernel at computer start.https://help.ubuntu.com/community/Grub2#Configuring%20GRUB%202
sudo gedit /etc/default/grub
At this line :
replace 0 with the right number (position of 2.6.34 kernel in your Grub start menu.)
If you test this, please report in this topic, thank you