I haven't used Windows for many years, so sorry if some of my question/description doesn't make sense. Recently I got a brand new Dell XPS13 9380 with pre-installed Windows 10. I want to replace the whole system with Ubuntu. When I tried to install from two bootable USBs, one with 16.04 and the other with 18.04. Neither saw the SSD, the only harddrive in the laptop, and ended up asking me how do I wish to partition/install in the thumbdrive-only space. I checked from Win10 and found the SSD has a few partitions, OS, WINRETOOLS, image, EFI, ..., and they are all NTFS and combine to occupy the whole SSD. I resized the OS partition to minimal, left the new space nonallocated (the only format choices are NTFS & exFAT), and repeated and found the SSD space was still not seen. "fdisk -l" showed /dev/loop0~7 and sda1 & 2, which are the thumbdrive itself. All the workaround I found require at least getting the NTFS seen from Ubuntu side, so I can resize/remove it, which I can't do now.
There are a few other things also worried me. The only way I found to boot into BIOS/UEFI interface is through Win10. I need to first boot into Windows and then choose to reboot into UEFI from "advanced startup options," and UEFI doesn't memorize the boot sequence and automatically change it back to Windows first. I am not sure in this case if it's safe to simply wipe the whole SSD clean. Also to boot from USB-contained Ubuntu, the laptop complained about not finding mmx64.efi, which I was able to get around by simply renaming grubx64.efi to mmx64.efi. Finally, I think the SSD is BitLocker encrypted. I don't know much about it, but it seems creating formatting complexity/problem from other articles.
Finally, I thought about taking out the SSD and formating it by other laptops, but it's really not preferred, because this laptop is really new and I don't want to lose warranty this early by opening it myself.
Thanks!
- Yen-Yung