I have installed Ubuntu 12.04 on Sony VAIO with preloaded Windows8. I allocated a space of 16gb seperately without creating a new volume and then put the Ubuntu installation disc.I had to Boot in UEFI for using Windows,and Legacy Boot mode for using Ubuntu. Everything was fine until a few days, then the issue starts : Both the OS became too slow and the partition editor shows that Ubuntu was loaded in the partition of windows itself.. Now i formatted that allocated space of Ubuntu partition from Windows itself (normal NTFS format) inorder to reinstall Ubuntu. Even though after the format,i get a prompt to chose The OS at Boot time. I dont exactly understand the problem... Please help me out.
I recently successfully dual boot Ubuntu 12.04 LTS / Windows 8 on a pre-loaded Toshiba Satellite C55-A5310 laptop. Following are some suggestions base on community feedback.
- Both Ubuntu and Windows can be dual booted in UEFI mode. This is the preferred method.
- Know your hardware. Example CPU, Graphic Card, etc. This will greatly benefit the process.
- Create Windows 8 Recovery disk. (Cannot emphasis this any more)
Following are the summary of the steps I followed. For more detail refer to the referances below. They were a good source.
- Create Recovery Media - Cannot emphasis the importance.
- Using windows disk manage shrink windows partition
- Create boot-able drive with Ubuntu (I created a DVD, you can use USB too)
- Turn off fast boot and disable secure boot
- Run the Ubuntu installer
- Partition the empty space ( Created after shirking the Windows partition)
- Install Ubuntu
- Reboot into the Ubuntu 12.04 LTS
- Install and Run the boot repair (I chose the following: Boot Repair => Buggy-kernel detected => Yes)
- Install Grub in PBR
As mentioned the above steps are described in greater detail in the following reference article.