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I am using Windows 8.1 with UEFI Boot Mode and secure boot is on. I read somewhere that you should turn off secure boot to install Ubuntu properly. I had installed Ubuntu on my different laptop and it is working fine with Windows 10 along with Ubuntu on UEFI boot and secure boot OFF.Now i want to install Ubuntu on my laptop with windows 8.1 previously installed.So,the question is that,is there any problem to install Ubuntu on it with secure boot ON,or i have to change secure boot to OFF?

Weirdoooo
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  • Depends on whether your laptop manufacturer does follow Microsoft's guidelines, or they decided to be sloppy. If they do follow MS's guidelines, you shouldn't have to. – muru Oct 27 '16 at 15:39
  • How can i check that my laptop follows Microsoft's guidelines or not?I am using Sony Vaio. – Weirdoooo Oct 27 '16 at 15:42
  • Only way to find out? Try installing Ubuntu with Secure Boot on. :( – muru Oct 27 '16 at 15:43
  • With Secure Boot on, you can only boot from UEFI boot menu, not from grub. Also Sony has issues. It has violated UEFI standard that says NOT to use description as part of boot. And of course only valid description is "Windows Boot Manager". But there are work arounds, primarily if dual booting using the fallback or /EFI/Boot/bootx64.efi which you create as a copy of shimx64.efi. http://askubuntu.com/questions/486752/dual-boot-win-8-ubuntu-loads-only-win/486789#486789 and: http://askubuntu.com/questions/150174/sony-vaio-with-insyde-h2o-efi-bios-will-not-boot-into-grub-efi or use rEFInd. – oldfred Oct 27 '16 at 16:06

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I would say turn Secure Boot OFF. It depends on the laptop, but I don't see a reason to leave Secure Boot ON.

I have a UEFI system, and I turned: Fast Boot, Fast Startup and Secure boot OFF.

OctaVIve
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  • Is there any problem if i install Ubuntu on secure boot ON? – Weirdoooo Oct 27 '16 at 15:40
  • @YKSingh There is a high probability that you will not have a successful installation with secure boot on. In addition, even if it is successful, there may be several issues with trying to run programs that require virtualization. As per OctaVive's (lack of an) answer, Secure Boot checks hardware-dependent code to see that it follows Microsoft's guidelines. Leaving it on is fine for Windows, but problematic for Linux. – negusp Oct 27 '16 at 16:45
  • Thanks @PatrickNegus,your answer will help me a lot. I Googling to convert secure boot ON to OFF,and i watched some steps with the help of Windows disk.Is that are correct method?The link is given where i read that stuff.

    http://www.howtogeek.com/175641/how-to-boot-and-install-linux-on-a-uefi-pc-with-secure-boot/

    It will be helpful for me if tell me that ,or if there is any other correct way to convert secure boot ON to OFF then please tell me.Help will be appreciated.

     – Weirdoooo Oct 27 '16 at 18:07