On Mon, 2021-02-08 at 11:46 +0000, Bernard McNeill wrote: > > On 07/02/2021 22:26, Lou Poppler wrote: > > On Sun, 2021-02-07 at 15:14 -0700, Lou Poppler wrote: > > > On Sun, 2021-02-07 at 20:44 +0000, Bernard McNeill wrote: > > > > [...] > > > > Trial-1. Reboot, no attempt to use F12. > > > > Boots directly into Windows. > > > > > > > > [...] > > > See install manual https://www.debian.org/releases/stable/installmanual > > > > > > Also worth asking: > > > . Is the machine booting in BIOS mode or UEFI mode, with or without > > > "Secure Boot"? Was the machine booting in that same mode during your > > > debian installation? > > > . Are the "disks" involved both/all partitioned in the same schema -- > > > i.e. GPT partitions or MBR partitions? > > > > I forgot when writing the above, but another important question is whether > > you > > have already disabled the Windows Fast Startup option in Windows 10. This > > is > > mandatory, and things will work differently depending on whether it is > > disabled > > already or not. See section 3.6.4 of the install manual. > > > > Fast startup was _not_ disabled - I thought (from install manual) only > applicable to Win-8, and this machine Win-10. > It is disabled now.
Good. This is updated in the new version of the install manual, thanks to Holger Wansing. (see https://www.debian.org/releases/testing/amd64/ch03s06.en.html ) > In the same spirit, found a 'Fastboot' option in BIOS: It was set to > 'Minimal', it is now set to 'Thorough'. > > UEFI mode, Secure Boot always set. > > Nothing much has changed, except that reboot now offers opportunity to > skip a disk check (not taken). > > I am nervous that not disabling 'Fast startup' might have messed up > process from beginning - I may repeat entire installation. Yes worth a re-do. Pay attention to section 6.3.7 of the install manual, about getting the grub boot loader installed (onto your removable disk). > +++ Are the "disks" involved both/all partitioned in the same schema -- > +++ i.e. GPT partitions or MBR partitions? > I have partitioned nothing on the laptop's SSD (and don't really want to > - the idea of the external USB HDD for Debian was to make that drive a > sandbox - no possible corruption of other work under Win-10). > The external USB HDD was partitioned by the debian_installer (Guided > total disk). This should be OK. You said above UEFI/Secure-boot always set, which implies that all the disks should be setup as GPT style. > > FWIW I sense that in some way the 'Debian' option in the boot list > points to Win-10 on the SSD, rather than the Debian on the external HDD. > If it pointed to rubbish surely the machine would simply hang. > > Best regards >
