On Wednesday, 18 September 2019 17:26:25 BST Peter Humphrey wrote: > On Wednesday, 18 September 2019 14:20:11 BST Mick wrote:
> > I think --label can only be specified when you --create a new entry in the > > UEFI boot menu. If there is an entry already present, I think you cannot > > modify it. When I get things wrong at menu entry creation time, I delete > > the whole entry and reconstitute it afresh. > > Ah, now why would the man page not say this? Indeed. I could be wrong how the 'efibootmgr --bootnum' is meant to work, but I share your experience with it, namely it doesn't seem to work with '-- label', but works with '--delete-bootnum'. > > Hmm ... I wonder what bootctl reads to populate its "title:" field. Would > > you care to share the output of: > > > > efibootmgr -v > > Taken just now, at 16:25 GMT: > > # efibootmgr -v > BootCurrent: 0000 > Timeout: 1 seconds > BootOrder: 0000,0001,0002 > Boot0000* EFI Stub HD(1,GPT,95b0a3f6-eae2-445c- > b098-3c8174588948,0x800,0x7f800)/File(\EFI\BOOT\BOOTX64.EFI) Boot0000 above is the first menu entry. "EFI Stub" is the label of this entry. Thereafter you can see the path of the bootable entry: HD - it is a hard drive 1 - on the first partition GTP - using a GPT partitioning schema 95b0a3f6-* - the UUID of the partition (not the fs) 0x800,0x7f800 - start-end of the partition in hex File - the filesystem path of the bootable image. > Boot0001* CD/DVD Drive BBS(CDROM,,0x0)..GO..NO........o.T.S.S.T.c.o.r.p. > .C.D.D.V.D.W. .S.N.-. > 2.0.8.F.B....................A...........................>..Gd-.;.A..MQ..L. > 1.S.3.2.Y.6.G.B.0.C.B.0.G.K. . . . . . ........BO Boot0001 is the second boot entry and is a CD/DVD drive. It seems you have a CD in it, without it you would probably see something like this: Boot0001* UEFI:CD/DVD Drive BBS(129,,0x0) > Boot0002* Hard Drive BBS(HD,,0x0)..GO..NO........o.C.T.1.0.0.0.B.X. > 1.0.0.S.S.D. > 1....................A...........................>..Gd-.;.A..MQ..L. > 5.1.4.0.0.F.2.0.8.3.4.6. . . . . . . . ........BO..NO........o.C.T. > 1.0.0.0.B.X.1.0.0.S.S.D. > 1....................A...........................>..Gd-.;.A..MQ..L. > 5.1.4.0.0.F.2.0.8.3.F.8. . . . . . . . > ........BO..NO..........S.A.M.S.U.N.G. .M.Z.V.P.V.2.5.6.H.D.G.L.-. > 0.0.0.0.0....................A.......................................J..Gd-. > ;.A..MQ..L.S.A.M.S.U.N.G. .M.Z.V.P.V.2.5.6.H.D.G.L.-.0.0.0.0.0........BO Boot0002 is the final entry by the looks of it refers to a Samsung SSD. > Is that the sort of thing you were expecting? I can't say it means much to > me. Yes, from what I see above there is only one label, "EFI Stub", corresponding to the first bootable entry of the menu. You can contact me off-list if you want help stringing the efibootmgr syntax, to create/delete entries in your boot menu. It may help future recovery exercises of your ESP in the future, without having to recreate partition tables, partitions and filesystems. -- Regards, Mick
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