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jpratik
July 31st, 2016, 12:34 AM
im using a sony vaio e series with windows 8 pre installed. i am trying to dual boot.
Secure Boot is disabled and it is set to boot UEFI
http://paste.ubuntu.com/21574297/

jpratik
July 31st, 2016, 01:56 AM
http://paste.ubuntu.com/21583026/

Bucky Ball
July 31st, 2016, 02:40 AM
And what exactly is happening when you try to boot? You haven't given us much to work with bar the bootinfo ...

What I can say is that you now have two EFI partitions. Did you create one during install by using the 'Something Else' option?

See this at the bottom of your second bootinfo:


Please do not forget to make your BIOS boot on sda3/EFI/ubuntu/shimx64.efi file!

If your computer reboots directly into Windows, try to change the boot order in your BIOS.
If your BIOS does not allow to change the boot order, change the default boot entry of the Windows bootloader.
For example you can boot into Windows, then type the following command in an admin command prompt:
bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi

I could add other possibilities as to what might be going wrong but I'd be guessing as don't know what happening when you boot the machine.

jpratik
July 31st, 2016, 03:13 AM
when i boot to EFI\ubuntu\grubx64.efi or shimx64.efi i get a blank screen

oldfred
July 31st, 2016, 05:11 AM
One Sony user, dual booting, and boot hard drive UEFI entry, not ubuntu

The trick was to manually copy the ubuntu Boot directory in place of the \EFI\Boot Directory, and rename shimx64.efi to \EFI\Boot\bootx64.efi (not \EFI\Microsoft\Boot\bootmgfw.efi )
Dual booting with Windows 8 on a Sony Vaio
http://ubuntuforums.org/showthread.php?t=2153589

But black screen is most often a video driver issues. What video card/chip do you have?

At grub menu you can use e for edit, scroll to linux line and replace quiet splash with nomodeset.
How to set NOMODESET and other kernel boot options in grub2 - both BIOS liveCD & grub first boot ( also UEFI with grub)
http://ubuntuforums.org/showthread.php?t=1613132


# Usually nVidia or AMD work with this:
nomodeset
# Usually Intel works with one of these:
i915.modeset=0
i915.i915_enable_rc6=1
video=1280x1024-24@60 # but change to your monitor size not 1280x1024
video=VGA-1:1280x1024-24@60 # but change to your monitor size
i915.preliminary_hw_support=1 #Skylake some versions of Ubuntu -For linux kernels older than 4.3.x, i915.preliminary_hw_support=1 must be added to your boot parameters for the driver to work on the new Intel Skylake (6th gen.) GPUs. On a fully updated system running kernel 4.3.x and up, this step is unneccesary.

If you do not get grub menu, then press escape Key(perhaps more than once) right after BIOS/UEFI screen. Or if BIOS press and hold shift key.

gordintoronto
July 31st, 2016, 11:10 PM
When you power on and lean on the shift key, still no grub?

jpratik
August 1st, 2016, 06:37 AM
when i power on it shows the vaio logo then goes straight to a blank screen, pressing shift doesn't do anything.

deadflowr
August 1st, 2016, 07:16 AM
I think if set to UEFI then it's the ESC key, instead of the shift key to access the grub-boot menu.

Oh, yeah.
oldfred mentioned as much at the end of his last post...

jpratik
August 2nd, 2016, 01:13 AM
ESC doesn't do anything either

oldfred
August 2nd, 2016, 04:31 AM
Sony normally defaults to boot Windows unless you have done one of the required work arounds already.
So is blank screen really from Windows?
Escape key should work if booting into grub, unless you have fast boot on in UEFI. Then you do not have time to press any keys.