I know this is a forum about Linux Mint, but I wish to share my experience installing Ubuntu 12.04 LTS on the ASUS. You can see me full review on Amazon here: http://www.amazon.com/review/R2IMBERYH2FEJB/ref=cm_cr_pr_perm?ie=UTF8&ASIN=B00B7K11QE&linkCode=&nodeID=&tag=
I finally installed Linux (Ubuntu 12.04 LTS) on the X55C. I am very satisfied with the laptops usability now. It goes out of hibernation relatively quickly and it connects to the internet with no issues. The control pad also works well. However, this was no easy task, since this model is equipped with secure boot UEFI. To install Ubuntu, follow these steps:
1. Shut down. Take battery out. Start. Press <F2>. You're in BIOS.Go to "Security" tab. "Disable" Secure Boot Control. Now go to "Boot" tab. "Disable" Fast Boot. "Enable" Launch CSM. Now appears submenu. "Enable" Launch PXe Oprom. Now you can select in Boot Option Properties "P2 ...DVDROM" to boot first in sequence.
2.Burn yourself a Ubuntu 12.04 (or equivalent) image installation DVD. Boot with this DVD.
3. You now see "Install" Ubuntu prompt. Choose "Install" and follow instructions. At "Installation Type," choose "Something Else." I had to partition the disk myself for this to work. SO you need around (?) 5 MB for "Reserved Bios Area"- the other stuff is your choice- I got this up and running with /root 3 GB, / 20 gb, / home 20 gb, swap 4 gb. Now install
4. When system restarts, you will see a screen saying "no connection to drive." No worries. Boot from start dvd. This time "Try Ubuntu"..Now install Boot Repair. This is a program you install in the "Try Ubuntu" area. Follow online documentation. Shut down.
5. GO into Bios. Select "Ubuntu" as first boot option. For some reason "Atheros Boot Agent" was installed before I used Boot Repair program. You can still use W8 in Grub by selecting "Windows UEFI" option
I hope this helps.