[Bug 1792564] Re: new version of shim refuses to chainload windows in dualboot

[Mathieu Trudel-Lapierre]

We rolled back shim; this would now be regression-proposed.

** Changed in: shim-signed (Ubuntu)
       Status: New => Triaged

** Changed in: shim-signed (Ubuntu)
   Importance: Undecided => Critical

** Changed in: shim-signed (Ubuntu)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Tags removed: regression-update
** Tags added: regression-proposed

** Also affects: grub2 (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: grub2 (Ubuntu)
       Status: New => Triaged

** Changed in: grub2 (Ubuntu)
   Importance: Undecided => Critical

** Changed in: grub2 (Ubuntu)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

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https://bugs.launchpad.net/bugs/1792564

Title:
  new version of shim refuses to chainload windows in dualboot

Status in grub2 package in Ubuntu:
  Triaged
Status in shim-signed package in Ubuntu:
  Triaged

Bug description:
  package: shim-signed, shim

  release:  Ubuntu 18.04.1 LTS

  version: shim-signed:amd64 1.37~18.04.1+15+1533136590.3beb971-0ubuntu1
   shim:amd64 15+1533136590.3beb971-0ubuntu1

  expected: grub menu loading xubuntu and windows in dualboot

  happened: loading xubuntu works, loading windows failes (no error - black screen - no hard disc light flashing)
  I uninstalled shim, shim-signed, disabled 'bionic-updates' and installed old versions 
  shim-signed:amd64 1.34.9.2+13-0ubuntu2
  shim:amd64 13-0ubuntu2
  and boot works well like before.

  I enabled 'bionic-updates' and installed the newer versions without
  error and again chainloading of windows fails.

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