On 08/28/2015 06:40 PM, Chris Murphy wrote: > Due to many things, including UEFI, and GRUB being overly complicated, > and each distro forking GRUB, and also not always keeping it up to > date with upstream, there are many variations in GRUB behavior > possible. So it's not necessarily the case a given grub.cfg contains > menu entries for all kernels/distros on the system. It might contain > only entries for a particular distribution. well, I know when I installed fedora, grub had entries for windows 10 and 3 fedora kernels. when I installed ubuntu after that, ubuntu became the default, and grub had 3 entries for fedora, plus windows 10, plus ubuntu. when I rebooted into fedora, and installed the latest kernel, THEN I had issues with grub, because I didn't know how to update the grub that was installed, and I didn't know how to update the fedora grub & have the system use that to boot from. > > In my view, the concept of grub.cfg containing entries for other > distros is fraught with peril, not least of which is that the wrong > /etc/grub/default is read to create the entries for other distros. > Also, kernel upgrades only cause one grub.cfg to get updated. So I > really wish this whole automatic creation of other distro menu entries > would go away and instead create a forwarding entry to all other > grub.cfg's. That way the proper menu entry for a particular > kernel+distro is always used. every time you boot into a specific distro, update the system, and install a new kernel, well, then grub needs to be updated. MY problem is, I want to keep ubuntu updated, but I always want fedora grub to be the default.. I don't think they thought about all these situations when they created grub... > > And this explanation is courtesy of how overly complicated it is. How > it actually works at a code level, just look at grub.cfg - it reads > like a bash script. It's not just a boot configuration file anymore. > It's simultaneously impressive and annoying. yes, I've edited the grub when I boot, to change an entry to a newer kernel that grub didn't know about. It isn't fun. > >>> >> >>> >> UEFI loads and runs shim.efi, which is identified in the UEFI boot >>> >> list. shim.efi loads and runs grubx64.efi. grubx64.efi loads its >>> >> configuration file, then loads and runs a Linux kernel (or Windows). >>> >> The kernel runs /sbin/init on its root filesystem. >>> >> >>>> >>> , whatever they are.. except there >>>> >>> is no shimx64.efi ... >>>> >>> >>>> >>> -rwx------ 1 root root 1293304 Feb 17 2015 shim.efi >>>> >>> -rwx------ 1 root root 1287032 Feb 17 2015 shim-fedora.efi >>> >> >>> >> The full path relative to the system partition is >>> >> "\EFI\ubuntu\shimx64.efi". It's in a different directory than the >>> >> Fedora-installed shim.efi. >> > I just mounted my ubuntu "/" partition and.... /boot/efi was... empty. >> > I'm pretty sure it was there when I booted ubuntu.. oh wait... /boot/efi >> > is a separate partition.. but it is already mounted, and it is fedora, >> > not ubuntu... arg.... > Yet another absurdity is this OCD on Linux with persistently mounting > shit that doesn't need to be mounted. No other OS does this with the > EFI System partition. In my opinion it's sloppiness+laziness that we > do this instead of mounting it dynamically on demand only when it's > necessary and then promptly umount it - which should be rather rare. this is beyond my ...current knowledge:) > > In a previous email some information you posted indicated the EFI > System partition was sda8, which makes me wonder if there's more than > one ESP on this drive. On an out of the box Windows 8.1 system I had, > it was sda2 and Fedora reused that rather than making a new ESP. More > than one ESP can also be confusing for the user, and might trigger > bugs even though it's permitted in the UEFI spec. I thought I had my partitions written down, so I would know what I had where... but this /boot/efi and /EFI/fedora & /EFI/ubuntu has totally screwed my mind up. I am running fedora, but I mounted my ubuntu partition to look at the EFI/ubuntu folder but.... it wasn't there. -- Paul Cartwright Registered Linux User #367800 and new counter #561587 -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
