How To install Ubuntu 15.04 on laptop with Windows 8 and UEFI

Let's install Ubuntu 15.04 with KDE (Kubuntu) on laptop with UEFI (in my case it was ASUS N56JR):

STEP 0: Get Kubuntu ISO

• Go to http://www.kubuntu.org/getkubuntu/
• Download Kubuntu 15.04 iso
• Burn DVD with ISO

STEP 1: UEFI

• Open UEFI menu (in my case I did it by pressing F2 just after I pressed power button on my laptop) 

• Go to Security tab

• Select "Secure Boot menu" and disable it

• Save & Exit

• Put DVD with Kubuntu into your laptop 
• Open UEFI menu again
• Go to Boot tab
• Change boot priorities: select as boot option #1 "UEFI: DVD". If your have several options for DVD - select one with "UEFI" prefix 

• Save & Exit
• On next boot you should have Ubuntu menu from DVD - select first option "Start Kubuntu" and you will get Kubuntu Live

Step 2: Kubuntu installation

• Start Live Kubuntu from DVD
• At this step I got black screen for several minutes - just be patient and you will get your Kubuntu Live :)
• Kubuntu will ask you to try/install it just after loading. Select "Install Kubuntu"
  

• Connect to a network
  

• Mark checkboxes if you want to install updates or third-party software, click "Continue"
  

• Wait some time. In my case it took more then 10 minutes 
  

• Check "Manual" installation type 
  

• Click "Continue". You will have partition table. Make sure you have "efi" partition
  

• Select free space and press "Add..."
• Create swap partition 
  

• Again select free space and press "Add..."
• Create ext4 partition with "/" as mount point 
  

• Click " Install Now" (partition with "/" mount point should be selected)
  

• Agree to write changes
  

• Select your time zone
  

• Select your keyboard layout 
  

• Create your user 
  

• Wait 
  

• Click "Restart now" 
  

• My laptop hanged at this stage. Do not worry - we will fix it. Just turn off your laptop by pressing power button

Step 3: GRUB configuration + fix shutdown/restart

• Login into your new Kubuntu
• Open Konsole

~$ sudo nano /etc/default/grub

• Edit GRUB_CMDLINE_DEFAULT

GRUB_CMDLINE_LINUX_DEFAULT="nomodeset acpi=force apm=power_off"

• Press CTRL+X to save & exit
• Edit modules files

~$ sudo nano /etc/modules

• Add to the end of file line:

apm power_off=1

• Save & exit
• Update GRUB

~$ sudo update-grub

• Restart you Kubuntu

~$ sudo shutdown -r now

• After reset "shutdown" from KDE panel will work

Step 4: Subwoofer

My ASUS n56jr has subwoofer but it is not work in Kubuntu without additional configuration. To make subwoofer work:

• Unmute 
  

• Connect your subwoofer
• Install alsa-tools-gui and run hdajackretask

~$ sudo apt-get install alsa-tools-gui

• Run hdajackretask (do not run it with sudo)

~$ hdajackretask

• Check "Show unconnected pins"
  
  

• Select pin with id 0x16. Check "Override" 
  

• Select "Internal speaker (LFE)" 
  

• Press "Apply now" 
  

• Press "Close" on pop-up window but do not close hdajackretask main window
• Go to KDE multimedia settings 
  

• Select "Audio Hardware Setup" tab
  

• Select "Analog Surround 4.0 Output"
  

• Click "Apply" ant test your sound
• If everything ok - press "Install boot override" in hdajackretask 
• Restart your laptop