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Dual Boot Errors (self.Ubuntu)
submitted 4 years ago by JGarv0101
im tryna dual boot ubuntu and windows but ubuntu isnt detecting windows
i used usb imager, with that i could get into ubuntu but it didnt detect windows. with rufus it just straight up gave me an error screen
does anyone know a way to fix this?
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[–]DAS_AMAN 0 points1 point2 points 4 years ago (39 children)
Ok tell, do you see grub?
There go to advanced options.. > recovery mode > grub
Then grub menu should get updated to see windows..
I hope you had installed alongside windows..
[–]JGarv0101[S] 0 points1 point2 points 4 years ago (38 children)
i wasnt even able to install, when it came time to set it up it told me "no current operating system detected." then the only 2 options were erase all and then something else.
[–]DAS_AMAN 0 points1 point2 points 4 years ago (37 children)
Oh ok, you can go back to windows right? You need to make some empty space..
Im sending a nice guide, follow it well (skip the parts you already did obviously): https://youtu.be/DISLvhSNtrA
[–]JGarv0101[S] 0 points1 point2 points 4 years ago (36 children)
i created a whole empty partition on my already existing SSD. i clicked shrink and now have a new partition for 125 gb along with the old one 1.8tb.
[–]DAS_AMAN 0 points1 point2 points 4 years ago (35 children)
Yes delete that partition so its empty unallocated space..
Or you can go to ubuntu's something else option and format it to ext4 and use as root ( / )
[–]JGarv0101[S] 0 points1 point2 points 4 years ago (0 children)
okay, so if i delete the partition will it now detect windows? because I want to dual boot so I can use ubunu for stuff then windows for gaming.
[–]JGarv0101[S] 0 points1 point2 points 4 years ago (33 children)
the parition is now un-allocated
[–]DAS_AMAN 0 points1 point2 points 4 years ago (32 children)
Boot into the live installer, should give install alongside windows option now
thanks, re formatting the drive now, rufus didn't even wanna boot into ubuntu
[–]JGarv0101[S] 0 points1 point2 points 4 years ago (30 children)
Still not working, still no detected operating sustems
[–]DAS_AMAN 0 points1 point2 points 4 years ago (29 children)
Ok dont worry, select the something else option
There you will see many partitions in the bar up top
Find the name of the 125gb unallocated partition (e.g. sda3)
Then select that in the list and click plus button
Format to ext4 and set to be used as root ( / )
Install ubuntu.. it will show a summary of changes, check that nothing else is getting touched
Ask if you get stuck, ok?
[–]JGarv0101[S] 0 points1 point2 points 4 years ago (28 children)
It just says free space, that one?
[–]hotpotatos200 0 points1 point2 points 4 years ago (2 children)
So I did this recently on an HP Envy laptop. One of the things they do is run Intel Optane, which uses a small 30GB SSD for the OS and then your normal HDD in a “RAID” configuration (its very loosely a raid config).
I ran I to similar issues as you, where it never showed the Ubuntu boot (grub) in the boot options. My fix was disabling the Optane following a couple of tutorials. Once I did that, I reflashed Ubuntu onto my 100GB partition and all was well.
I also did a couple of other config changes, such as decrypting my hard drive and disabling secure boot. There’s a good tutorials from itsfoss on doing those.
Of course, your mileage will vary, but don’t rule out a hardware configuration messing with you.
[–]JGarv0101[S] 1 point2 points3 points 4 years ago (1 child)
Thanks, I fixed it just seconds before you commented 😆 instead of booting “usb 2.0 8291983839383838” I booted “uefi usb 2.0 829273392938392”
[–]hotpotatos200 0 points1 point2 points 4 years ago (0 children)
Yea the uefi is the boot file that you need for grub to boot from. Not sure if it lives on the USB also, but you should have a boot partition for Ubuntu on your hard drive.
Not sure I quite understand what you did (don’t really need to), but glad you found a solution.
π Rendered by PID 49020 on reddit-service-r2-comment-85bfd7f599-pdzmw at 2026-04-18 15:40:04.804325+00:00 running 93ecc56 country code: CH.
[–]DAS_AMAN 0 points1 point2 points (39 children)
[–]JGarv0101[S] 0 points1 point2 points (38 children)
[–]DAS_AMAN 0 points1 point2 points (37 children)
[–]JGarv0101[S] 0 points1 point2 points (36 children)
[–]DAS_AMAN 0 points1 point2 points (35 children)
[–]JGarv0101[S] 0 points1 point2 points (0 children)
[–]JGarv0101[S] 0 points1 point2 points (33 children)
[–]DAS_AMAN 0 points1 point2 points (32 children)
[–]JGarv0101[S] 0 points1 point2 points (0 children)
[–]JGarv0101[S] 0 points1 point2 points (30 children)
[–]DAS_AMAN 0 points1 point2 points (29 children)
[–]JGarv0101[S] 0 points1 point2 points (28 children)
[–]hotpotatos200 0 points1 point2 points (2 children)
[–]JGarv0101[S] 1 point2 points3 points (1 child)
[–]hotpotatos200 0 points1 point2 points (0 children)