I've let this slip off my radar since, and it's not gone away. I'm seeing this problem really obviously with live installations now, as I've just been testing them with Secure Boot.
Hoping to play with this more in the next few days... On Tue, Jul 25, 2017 at 11:33:36PM +0100, Steve McIntyre wrote: >Hey folks, > >Leif (in CC) pointed this out to me after he did a fresh Stretch >installation over the weekend. I've just verified the problem >myself. Our initial thought was that this might be specific to >installations onto NVME, but I've tested and it's not, it's generic. > >Right at the end of a simple installation to a single disk device, >when we run grub-installer, the generated grub.cfg is using >root=/dev/XXXX for the kernel command line rather than what it should >be (root=UUID=YYYY). This bug has managed to slip through our >installation testing as the resulting system will still boot fine for >simple single-disk cases... > >I've compared this to a jessie installation using the same setup, and >that did the right thing (i.e. the final grub.cfg used >root=UUID=YYYY). I've spent some time tracking down what's going on, >and I can see the *first* level of problem at least. > >In grub-mkconfig, it looks for entries in /dev/disk/by-uuid/ to match >the UUID for /. If it can't find one, it falls back to using the >direct /dev/ disk device for the rootfs. Checking back, I can see: > > * in jessie, the entries in /dev/disk/by-uuid/ are refreshed after > we're finished in partman > > * in stretch, they are not. You can see this most obviously - start > with a blank disk and the only entry that will show up in there > throughout the installation is for the installation medium > >Does anybody have any insights as to how this might have >changed/broken? I'm too tired to dig much further tonight, but I'll >carry on looking tomorrow. > >*Finally* - this is not a critical problem in the long run AFAICS. As >soon as people update their grub.cfg in their new system (so a new >kernel, or a new grub, or new versions of various other packages), >the installed system should generate a fixed UUID-style grub.cfg. > >-- >Steve McIntyre, Cambridge, UK. st...@einval.com >< Aardvark> I dislike C++ to start with. C++11 just seems to be > handing rope-creating factories for users to hang multiple > instances of themselves. -- Steve McIntyre, Cambridge, UK. st...@einval.com Welcome my son, welcome to the machine.
