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