Hi there! On Tue, 31 Dec 2013 15:50:39 +0100, Antoine Beaupré wrote: > On 2013-12-31 05:45:01, Andreas Cadhalpun wrote: >> Installing on UEFI firmware is supported, but is a little bit tricky, >> see for example [1]. Particularly you need a GPT partitioned hard disk >> with two additional partitions, one EFI partition marked with the 'boot' >> flag in gparted and a partition for grub marked as 'bios_grub' in >> gparted.
Wrong, with UEFI you do not need any 'bios_grub' partition at all: <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=691046#36> > Yeah... I struggled with that before, and I *was* able to make it work, > but since it wasn't obvious this was necessary *during* the installer, I > did a normal MBR-based partitionning. When the boot loader failed to > install, I didn't want to go back and redo everything, especially since > this is a dual-boot system and I was happy to have been able to resize > the NTFS partition at all... ;) Sorry, but there is something strange here. In the first email you reported that "when I rebooted, grub was not installed in the MBR and I was brought back into windows", which means that partman used the partition table already present. This can be checked with a simple `fdisk -l /dev/sda`: if there is no GPT mention, then the partition table is plain old MBR. BTW, Windows 7 does not mandate GPT nor UEFI, but can use both. >> Then the installer has to support installing on UEFI, which the >> default installer does, but I don't know about the one you created. > > I was able to dig out more information about the image since then: > > $ less .disk/info > Debian GNU/Linux 7.0.0 "Wheezy" - Official Snapshot amd64 LIVE/INSTALL Binary > 20130505-18:46 > $ less .disk/udeb_include > netcfg > ethdetect > pcmciautils-udeb > live-installer > > From what I understand, debian-installer supports installing on > UEFI/GPT, but partman doesn't support *creating* GPT partitions, do I > get this right? Wrong, partman creates GPT partitions with no problem, but by default only for disk bigger than 2TB. > Shouldn't we create GPT partitions all the time now anyways? Why? IMHO if there is no need for it (because BIOS is used) plain old MBR is easier. >> Last but not least, you have to select the UEFI:USB in the firmware >> and not BIOS:USB, which every firmware has a different marking scheme >> for, but disabling legacy-bios (or equivalent option) in the UEFI >> BIOS, should always disable the BIOS:USB option. (It can be enabled >> again after installation.) > > Right, I guess this is the tricky bit. It seems that in any case, the > user needs to go fiddle in the BIOS, which is annoying. In my case, I > was able to install by *disabling* UEFI in the BIOS, but the reverse > might be the case for others. No need to fiddle in the BIOS if you simply use UEFI (d-i supports it). Thx, bye, Gismo / Luca
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