I am not able to boot into ubuntu (turning the PC on goes straight into Win10).
I am working on a ThinkStation P410.
When I enter the bios boot options (F12), I do see "UEFI: Windows boot manager" but not ubuntu-like entries.
SecureBoot and quick boot are both disabled; boot mode says "uefi only".
boot-repair and it did not work, also updated bootmgr in Win10 with path \EFI\Ubuntu\shimx64.efi without improvement.
I am posting from ubuntu liveCD, though I need to modify the grub option including
acpi=off, otherwise it stalls.
My ubuntu is installed in separate partitions for root (/) and home. I also created an empty 1GB partition for bootloader(s) only, at the beginning of the disk, but I haven't used it yet as I need a bit more understanding of what's going on.
I have backup of my data, and I am keen to try things to fix this. I actually re-installed ubuntu, and it did not work either. Since I do have a limited knowledge/understanding of Linux, I would really appreciate if someone can illustrate me a bit of boot/existence of two OSs on a drive, one of them being ubuntu. For example, something I do not get yet is: grub can boot (any?) linux & Win OS but the windows one cannot? If so, could I get rid of the Win one and deal with a single bootloader installed onto the drive, perhaps within its own partition?
I would also appreciate if someone can illustrate me how to "clean" the bootloader(s) from unnecessary stuff.
Also, this problem came up when ubuntu wanted to update and then requested me to reboot, which I generally don't. So the problem might have been there for a while already or not, I just don't know. That's also why I would like to get a bit of better understanding of the entire boot/grub process and setup.
Thanks in advance folks. Cheers
edit: additional info
sudo fdisk -l /dev/nvme0n1 Device Start End Sectors Size Type /dev/nvme0n1p1 2099200 3020799 921600 450M Microsoft basic data /dev/nvme0n1p2 3020800 3225599 204800 100M EFI System /dev/nvme0n1p3 3225600 385814527 382588928 182.4G Microsoft basic data /dev/nvme0n1p4 385814528 804902911 419088384 199.9G Windows recovery environmen /dev/nvme0n1p5 804902912 1000214527 195311616 93.1G Windows recovery environmen /dev/nvme0n1p6 2048 2099199 2097152 1G BIOS boot Partition table entries are not in disk order.
p4/5 are the linux partitions that I am trying to save.