Initial ramdisk as second parameter is left out

Hi there,

multiboot with Ubuntu, Windows and Manjaro worked fine for some time. However, os-prober doesn't take care of Manjaros initial ramdisk any more. This is an example of how it's now on my system from file /boot/grub/grub.cfg:

menuentry 'Manjaro Linux (20.0.3) (auf /dev/nvme0n1p5)' --class manjarolinux --class gnu-linux --class gnu --class os $menuentry_id_option '
osprober-gnulinux-simple-52768e35-66bf-4dd6-ab95-64fd30abb67e' {
 savedefault
 insmod part_msdos
 insmod ext2
 if [ x$feature_platform_search_hint = xy ]; then
   search --no-floppy --fs-uuid --set=root 52768e35-66bf-4dd6-ab95-64fd30abb67e
 else
   search --no-floppy --fs-uuid --set=root 52768e35-66bf-4dd6-ab95-64fd30abb67e
 fi
 linux /boot/vmlinuz-5.8-x86_64 root=UUID=52768e35-66bf-4dd6-ab95-64fd30abb67e rw quiet apparmor=1 security=apparmor udev.log_priorit
y=3
 initrd /boot/amd-ucode.img

Comparing this to the output from Manjaro:

menuentry 'Manjaro Linux' --class manjaro --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-52768e35-66bf-4dd6-
ab95-64fd30abb67e' {
 savedefault
 load_video
 set gfxpayload=keep
 insmod gzio
 insmod part_msdos
 insmod ext2
 if [ x$feature_platform_search_hint = xy ]; then
   search --no-floppy --fs-uuid --set=root 52768e35-66bf-4dd6-ab95-64fd30abb67e
 else
   search --no-floppy --fs-uuid --set=root 52768e35-66bf-4dd6-ab95-64fd30abb67e
 fi
 linux /boot/vmlinuz-5.8-x86_64 root=UUID=52768e35-66bf-4dd6-ab95-64fd30abb67e rw quiet apparmor=1 security=apparmor udev.log_prio
rity=3
 initrd /boot/amd-ucode.img /boot/initramfs-5.8-x86_64.img

Is there a workaround until fixed?

Kind regards

Stefan

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: os-prober 1.74ubuntu2
Uname: Linux 5.8.5-050805-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Aug 29 23:30:06 2020
InstallationDate: Installed on 2019-05-02 (484 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: os-prober
UpgradeStatus: No upgrade log present (probably fresh install)