I'm trying to install Ubuntu to my laptop, but I ran into similar problem as the one from this link:
No "Install Ubuntu" option when booting from USB drive
I tried the solution from that page but it didn't work. And I just can't seems to find a solution for this. My laptop is Asus a455l. Sorry for the repeated question and thanks for the help in advance.
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david
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Where are you expecting to see the option to install Ubuntu? It’s generally done from the live environment if you’re installing Ubuntu Desktop. This walk-through from Canonical has a pretty decent set of instructions to follow. – Dec 22 '20 at 11:58
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Yes, I'm following the steps provided by Canonical, but when I tried to boot my usb from bios setting, instead of showing the welcome window like the one from the walk-through, it instead shows the GNU Grub with the options like in the link I provided earlier. there is no option to install Ubuntu. I'm so confused. – david Dec 22 '20 at 12:08
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I finally got it to work. Here's what I did:
- When in BIOS settings I enabled CSM.
- Then I restart my laptop and open BIOS settings again.
- Now there are several new boot options:
- [UEFI] USB drive name
- ...
- USB drive name <------- I chose this, and ubuntu finally loaded
I hope my experience is any help for some people. Thanks.

david
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Glad you managed to work it out. Hopefully this helps other people who use an Asus A455L as well – Dec 22 '20 at 12:35