Samsung N145PLUS NP-N145-JP03UK
The OEM hidden partitions for boot and system recovery make it nigh on impossible to dual boot Win7 and Ubuntu 11.04. There is a way round it. Boot a copy of Gparted Live and shrink a Windows partition. Create 3 partitions for Ubuntu, one for /, one for swap and one for /home. Close down.
Boot a copy of Ubuntu 11.04 live and install into the three partitions you created for the task. Towards the beginning of the install, at the bit where you allocate disk space, select "Something Else" to bring up the disk partitioner. Change each of the partitions you created to meet the needs of the Ubuntu install (ie EXT4, reformat for /, a swap partition and EXT4, reformat for /home. Before you continue, look at drop down where you tell install where you want to put Grub. Select the Ubuntu root partition. Finish the install.
When you reboot, Win 7 will appear, no grub menu. Download a free copy of EasyBCD and install it. Add Ubuntu to it and apply. Then when you reboot, you get the Windows boot manager giving a choice of Win7 or Ubuntu. Select Ubuntu and the Grub menu appears. Select Ubuntu and you get Ubuntu. If you can't live with having two menus like that, simply configure Grub2 to have a timeout of 0, then you won't see the Grub menu!
I did all of that, liked Samsung Tools (more about that later) and I then reinstalled Ubuntu 11.04, but clearing the disk of all partitions (So Win7 & the pesky OEM hidden partitions became a thing of the past.
To get Voria Samsung Tools installed & working start Terminal and enter each of the lines below, finishing each line with a press on the Enter key:-
sudo add-apt-repository ppa:voria/ppa
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install samsung-tools samsung-backlight
When the computer reboots, start Terminal again and enter the line below:-
The last line makes certain all is up to date and may well satisfy some dependencies.
Reboot and you'll have a new entry in the System-->Preferences menu, "Samsung Tools Preferences", which is nice. You will also find everything works fine, WiFi, Function keys, audio up/down, screen brightness up/down,internal mic, external mics, USB, USB headsets, SDHC cards recognised in the SD card slot. Install Cheese and you'll find Fn+F3 toggles the webcam on and off. Toggle on before starting cheese.
Without doubt, Voria Samsung Tools makes this the best netbook/Ubuntu combo ever.
You'll love it.