Public bug reported:
I am trying to create Packer autoinstall images with EFI boot using the
new autoinstaller. With EFI boot mode, I noticed a kernel parameter
handling issue.
Starting with a Ubuntu Server 20.04.1 ISO, I can boot the kernel of the ISO by
providing the following command line parameter in *BIOS* boot mode:
"boot_wait": "5s",
"boot_command": [
"<enter><enter><f6><esc><wait> ",
"autoinstall ds=nocloud-net;seedfrom=http://{{ .HTTPIP }}:{{ .HTTPPort
}}/",
"<wait>"
]
However, the same approach fails in *EFI* boot mode:
"boot_wait": "3s",
"boot_command": [
"<esc><wait>",
"<esc><wait>",
"linux /casper/vmlinuz --- autoinstall
ds=nocloud-net;seedfrom=http://{{ .HTTPIP }}:{{ .HTTPPort }}/<enter><wait>",
"initrd /casper/initrd<enter><wait>"
]
Checking /proc/cmdline, I noticed that in this case it is "...
autoinstall ds=nocloud-net". The part after the semicolon is cut off.
Fix is to use quotes (") for ds="...". Then, the cmdline of the booted kernel
will be correct:
"boot_command": [
"<esc><wait>",
"<esc><wait>",
"linux /casper/vmlinuz --- autoinstall
ds=\"nocloud-net;seedfrom=http://{{ .HTTPIP }}:{{ .HTTPPort }}/\"<enter><wait>",
"initrd /casper/initrd<enter><wait>"
]
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: grub-efi-amd64-bin 2.04-1ubuntu26.2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Thu Aug 20 15:10:56 2020
InstallationDate: Installed on 2020-01-21 (212 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200117.1)
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: grub
Importance: Undecided
Status: New
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
** Also affects: grub
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1892365
Title:
Kernel parameter handling issue in EFI boot mode + work-around
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