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Just installed 18.04 from a live usb. Windows 10 is on sdb2, Ubuntu is on sdb3, sdb is a 256G SSD. sda is a 1TB hard drive. After the install I rebooted and it booted straight to Windows. I booted back to the usb and ran boot-repair with 'install on all disks'. Rebooted, now it only boots Ubuntu, no grub menu. The bios boot option for usb includes the word UEFI. boot-repair returned http://paste.ubuntu.com/p/2prwjfBwYZ/

I can probably find a howto on installing grub manually but am unsure on a couple of points. Have seen posts about UEFI being an issue. Dont even know what this means. Which drive should I install grub to? This is my first SSD, does this create any issues?

Im not committed to the install yet so can start with a fresh install from scratch if thats easier.

Any help appreciated.

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  • While you have a new UEFI based system, you have both Windows & Ubuntu installed in the now 35 year old BIOS/MBR configuration. You cannot mix UEFI installs with BIOS installs, but should be able to dual boot. Is Windows hibernated? askubuntu.com/questions/843153/… & askubuntu.com/questions/145902/… Better to keep Windows boot loader in sdb's MBR, and have grub only in sda's MBR. If Windows is hibernated or needs repairs, then you can boot sdb from UEFI/BIOS to fix it. – oldfred Mar 9 '20 at 2:56
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Thank you oldfred for your comment. Yes, Windows was hibernated. I was able to use ntfs-3g to remove the hiber-file. I then booted into Windows from Grub and turned off fast-boot. Hardly notice the difference in boot speed with the ssd.

Everything works fine now.

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