Hi all,
I'm getting a bit stuck installing Kubuntu 20.04.1 LTS on my laptop with Secure Boot / dual booting with Win10.
I can complete the installation process but Windows always boots.
I can see that the ESP partition has the EFI/ubuntu/*.efi files (while I'm live-booted using the linux disk) and efibootmgr shows what appears to be correct entries for the bootup definitions for the ubuntu's .efi files. I've had conflicting advice when searching online as to where to install the bootloader - some say on the start of the disk (where MBR used to be) and some say at the Linux root partition. I've done the latter.
I have booted off the CD immediately after the install to enrol using the MOK manager which comes up automaticall.
The Acer UEFI "Security" menu doesn't show any files in the ubuntu folder to choose them as trusted components for boot. The Microsoft folder has entries, and also importantly the . and .. directory entries. I have already fsck.vfat the partition, initially showed incorrect free clusters but that was correct before another reinstall.
Anyone have some advice please on anything I may have missed?
Thanks kindly, Srdjan
On Mon, 24 Aug 2020 at 21:22, Huge huge@huge.org.uk wrote:
FWIW I gave up with dual booting years ago and now just run other O/S's in a VM. I use VirtualBox, but other Hypervisors are available.
I know, I didn't really want to scrub Windows this time a-round (been Windows-less at home since 2004).
In the end, the main culprit seems to be Intel Optane [*1], their SSD / NVME RAID thing (maybe I should have chosen a Ryzen laptop :-D ). No wonder I was getting weird corruption on the EFI system partition, as Windows was reporting on chkdsk and UEFI / BIOS was reporting strange filenames in the ubuntu directory. My guess is that it's not really possible to directly write to that partition (Linux or Windows) if it's being RAIDed by Optane. Even that hypothesis doesn't make much sense to my little grey cells.
Linux boots up now. Only trouble is that I have to press F12 at boot time to get access to the boot menu otherwise Windows loads as default. I suspect this is more a grub / efi conundrum and might be fixable by setting Grub as the main bootloader. Investigation for another day.
[*1] - https://discourse.ubuntu.com/t/ubuntu-installation-on-computers-with-intel-r...
Thanks, Srdjan
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Huge -
Srdjan Todorovic