Package: partman-efi Version: 47 Severity: important Tags: d-i Ad originally described in [1], but no bug was ever filed to match. #695048 is related, I think. Time to file a bug about this to help track work to fix it...
We have a machine with both UEFI and BIOS-mode boot available, with an existing BIOS-mode Windows installation (e.g. Windows 7 in this case) *but* the machine is set up to try and boot UEFI first and *then* fall back to BIOS (for some reason). The existing Windows installation boots via the fallback, and the user has no reason to ever investigate this. However, d-i will happily boot in UEFI mode. When we get to partitioning, there is no EFI System Partition (ESP), as Windows isn't using one. We then get to either of two potentially bad cases: (a) the user shuffles partitions around and makes an ESP, installs the system OK including grub-efi. They then have a machine that will boot via UEFI to grub, but maybe will not be able to boot Windows. I've not tested this directly yet, but I can see this happening. To get to their existing Windows installation, the user will have to switch boot mode in the firmware setup - bad. (b) the user does not make an ESP, installs a system but grub-efi fails to install properly for that reason. I'm seeing bug reports that suggest this path does *not* necessarily give a clear error to the user, maybe in some cases no error at all. They reboot their newly-installed system and find it immediately goes into Windows with no sign of their new Debian installation at all. [1] https://lists.debian.org/debian-boot/2014/02/msg00080.html -- System Information: Debian Release: 7.6 APT prefers stable APT policy: (500, 'stable'), (500, 'oldstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- To UNSUBSCRIBE, email to debian-boot-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20140928010253.8641.22037.reportbug@tack.local