Ubuntu
linux-signed-hwe-5.15 package

Kernel 5.15 hangs at "Loading initial ramdisk"

Bug #1981590 reported by David
40
This bug affects 7 people
Affects Status Importance Assigned to Milestone
linux-signed-hwe-5.13 (Ubuntu)
Confirmed
Undecided
Unassigned
linux-signed-hwe-5.15 (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

Updated from kernel 5.13 to 5.15 today. After rebooting the system hangs at "Loading ramdisk". I reverted to 5.13 and it started properly.

More detail on the way.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.13.0-52-generic 5.13.0-52.59~20.04.1
ProcVersionSignature: Ubuntu 5.13.0-52.59~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-52-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 13 14:48:42 2022
InstallationDate: Installed on 2021-01-06 (553 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: linux-signed-hwe-5.13
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
David (lofidevops) wrote :
Revision history for this message
David (lofidevops) wrote :

Result of dpkg -l | grep '^ii linux':

```
ii linux-base 4.5ubuntu3.7 all Linux image base package
ii linux-firmware 1.187.32 all Firmware for Linux kernel drivers
ii linux-generic-hwe-20.04 5.15.0.41.44~20.04.13 amd64 Complete Generic Linux kernel and headers
ii linux-headers-5.13.0-52-generic 5.13.0-52.59~20.04.1 amd64 Linux kernel headers for version 5.13.0 on 64 bit x86 SMP
ii linux-headers-5.15.0-41-generic 5.15.0-41.44~20.04.1 amd64 Linux kernel headers for version 5.15.0 on 64 bit x86 SMP
ii linux-headers-generic-hwe-20.04 5.15.0.41.44~20.04.13 amd64 Generic Linux kernel headers
ii linux-hwe-5.13-headers-5.13.0-52 5.13.0-52.59~20.04.1 all Header files related to Linux kernel version 5.13.0
ii linux-hwe-5.15-headers-5.15.0-41 5.15.0-41.44~20.04.1 all Header files related to Linux kernel version 5.15.0
ii linux-image-5.13.0-52-generic 5.13.0-52.59~20.04.1 amd64 Signed kernel image generic
ii linux-image-5.15.0-41-generic 5.15.0-41.44~20.04.1 amd64 Signed kernel image generic
ii linux-image-generic-hwe-20.04 5.15.0.41.44~20.04.13 amd64 Generic Linux kernel image
ii linux-libc-dev:amd64 5.4.0-122.138 amd64 Linux Kernel Headers for development
ii linux-modules-5.13.0-52-generic 5.13.0-52.59~20.04.1 amd64 Linux kernel extra modules for version 5.13.0 on 64 bit x86 SMP
ii linux-modules-5.15.0-41-generic 5.15.0-41.44~20.04.1 amd64 Linux kernel extra modules for version 5.15.0 on 64 bit x86 SMP
ii linux-modules-extra-5.13.0-52-generic 5.13.0-52.59~20.04.1 amd64 Linux kernel extra modules for version 5.13.0 on 64 bit x86 SMP
ii linux-modules-extra-5.15.0-41-generic 5.15.0-41.44~20.04.1 amd64 Linux kernel extra modules for version 5.15.0 on 64 bit x86 SMP
ii linux-sound-base 1.0.25+dfsg-0ubuntu5 all base package for ALSA and OSS sound systems
```

Revision history for this message
David (lofidevops) wrote :

No extra info available, once I get the following message, no keys respond (e.g. NumLock cannot switch state). The same happens for the "recovery mode" option.

Loading Linux 5.15.0-41-generic ...
Loading initial ramdisk ...
_

David (lofidevops)
summary: - Computer hangs at boot
+ Kernel 5.15 hangs at "Loading initial ramdisk"
Revision history for this message
David (lofidevops) wrote :

Tried removing modifying /etc/default/grub by setting GRUB_CMDLINE_LINUX_DEFAULT to "" (was "quiet splash")

Results:

- 5.13: spews lots of logs, no splash screen when prompted for disk encryption passphrase

- 5.15: still hangs at the same place, no logs

Revision history for this message
David (lofidevops) wrote :

$ ls -lh /boot/initrd*

lrwxrwxrwx 1 root root 28 Jul 13 07:55 /boot/initrd.img -> initrd.img-5.15.0-41-generic
-rw-r--r-- 1 root root 108M Jul 13 07:54 /boot/initrd.img-5.13.0-52-generic
-rw-r--r-- 1 root root 117M Jul 13 07:55 /boot/initrd.img-5.15.0-41-generic
lrwxrwxrwx 1 root root 28 Jul 13 07:55 /boot/initrd.img.old -> initrd.img-5.13.0-52-generic

$ df -h /boot

Filesystem Size Used Avail Use% Mounted on
/dev/nvme0n1p2 705M 267M 387M 41% /boot

Revision history for this message
David (lofidevops) wrote :
Download full text (200.2 KiB)

$ lsinitramfs /boot/initrd.img-5.15*

.
kernel
kernel/x86
kernel/x86/microcode
kernel/x86/microcode/AuthenticAMD.bin
kernel
kernel/x86
kernel/x86/microcode
kernel/x86/microcode/.enuineIntel.align.0123456789abc
kernel/x86/microcode/GenuineIntel.bin
.
bin
conf
conf/arch.conf
conf/conf.d
conf/conf.d/zz-resume-auto
conf/initramfs.conf
cryptroot
cryptroot/crypttab
etc
etc/console-setup
etc/console-setup/Uni2-Fixed16.psf.gz
etc/console-setup/cached_UTF-8_del.kmap.gz
etc/default
etc/default/console-setup
etc/default/keyboard
etc/dhcp
etc/dhcp/dhclient-enter-hooks.d
etc/dhcp/dhclient-enter-hooks.d/config
etc/dhcp/dhclient.conf
etc/fonts
etc/fonts/conf.d
etc/fonts/conf.d/60-latin.conf
etc/fonts/fonts.conf
etc/fstab
etc/ld.so.cache
etc/ld.so.conf
etc/ld.so.conf.d
etc/ld.so.conf.d/fakeroot-x86_64-linux-gnu.conf
etc/ld.so.conf.d/i386-linux-gnu.conf
etc/ld.so.conf.d/libc.conf
etc/ld.so.conf.d/x86_64-linux-gnu.conf
etc/lvm
etc/lvm/lvm.conf
etc/lvm/lvmlocal.conf
etc/lvm/profile
etc/lvm/profile/cache-mq.profile
etc/lvm/profile/cache-smq.profile
etc/lvm/profile/command_profile_template.profile
etc/lvm/profile/lvmdbusd.profile
etc/lvm/profile/metadata_profile_template.profile
etc/lvm/profile/thin-generic.profile
etc/lvm/profile/thin-performance.profile
etc/lvm/profile/vdo-small.profile
etc/modprobe.d
etc/modprobe.d/alsa-base.conf
etc/modprobe.d/amd64-microcode-blacklist.conf
etc/modprobe.d/blacklist-ath_pci.conf
etc/modprobe.d/blacklist-firewire.conf
etc/modprobe.d/blacklist-framebuffer.conf
etc/modprobe.d/blacklist-modem.conf
etc/modprobe.d/blacklist-oss.conf
etc/modprobe.d/blacklist-rare-network.conf
etc/modprobe.d/blacklist.conf
etc/modprobe.d/intel-microcode-blacklist.conf
etc/modprobe.d/iwlwifi.conf
etc/motd
etc/mtab
etc/nsswitch.conf
etc/os-release
etc/passwd
etc/plymouth
etc/udev
etc/udev/udev.conf
init
lib
lib32
lib64
libx32
run
sbin
scripts
scripts/functions
scripts/init-bottom
scripts/init-bottom/ORDER
scripts/init-bottom/lvm2
scripts/init-bottom/plymouth
scripts/init-bottom/udev
scripts/init-premount
scripts/init-premount/ORDER
scripts/init-premount/brltty
scripts/init-premount/lvm2
scripts/init-premount/plymouth
scripts/init-top
scripts/init-top/ORDER
scripts/init-top/all_generic_ide
scripts/init-top/blacklist
scripts/init-top/brltty
scripts/init-top/console_setup
scripts/init-top/framebuffer
scripts/init-top/udev
scripts/local
scripts/local-block
scripts/local-block/ORDER
scripts/local-block/cryptroot
scripts/local-block/lvm2
scripts/local-bottom
scripts/local-bottom/ORDER
scripts/local-bottom/cryptgnupg-sc
scripts/local-bottom/cryptopensc
scripts/local-bottom/cryptroot
scripts/local-bottom/ntfs_3g
scripts/local-premount
scripts/local-premount/ORDER
scripts/local-premount/fixrtc
scripts/local-premount/ntfs_3g
scripts/local-premount/resume
scripts/local-top
scripts/local-top/ORDER
scripts/local-top/cryptopensc
scripts/local-top/cryptroot
scripts/local-top/lvm2
scripts/nfs
scripts/panic
scripts/panic/ORDER
scripts/panic/console_setup
scripts/panic/plymouth
usr
usr/bin
usr/bin/cpio
usr/bin/cryptroot-unlock
usr/bin/dd
usr/bin/dmesg
usr/bin/fstype
usr/bin/halt
usr/bin/ipconfig
usr/bin/kbd_mode
usr/bin/kmod
usr/bin/loadkeys
usr/bin/losetup
usr/bin/minip...

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in linux-signed-hwe-5.13 (Ubuntu):
status: New → Confirmed
Revision history for this message
David Marshall (dmarshall) wrote :

Independent confirmation from me, with the same symptoms:

updated from kernel 5.13 to 5.15 today. After rebooting the system hangs at "Loading ramdisk". I reverted to 5.13 and it started properly.

Revision history for this message
David (lofidevops) wrote :

While experimenting with FreeDOS and Windows PE, I discovered that disabling UEFI mode (switching to Legacy mode) means I can now boot into kernel 5.15. Certainly not a solution, but at least a workaround.

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in linux-signed-hwe-5.15 (Ubuntu):
status: New → Confirmed
Revision history for this message
FAV (majfav) wrote :

Still no solutions about this bug?

Revision history for this message
David (lofidevops) wrote :

FWIW I'm now running Ubuntu 22.04 in Legacy mode and finding the workaround satisfactory.

ls -lh /boot/initrd*

lrwxrwxrwx 1 root root 28 Dec 1 13:56 /boot/initrd.img -> initrd.img-5.15.0-56-generic
-rw-r--r-- 1 root root 107M Nov 30 11:46 /boot/initrd.img-5.15.0-53-generic
-rw-r--r-- 1 root root 107M Dec 1 13:56 /boot/initrd.img-5.15.0-56-generic
lrwxrwxrwx 1 root root 28 Dec 1 13:56 /boot/initrd.img.old -> initrd.img-5.15.0-53-generic

Revision history for this message
Yosha872 (yosha) wrote (last edit ):

Same issue here. Suddenly my OS (Xubuntu 22.04) shows this issue (Kernel: 5.15.0-71-generic).
But when I boot with the previous version (5.15.0-70-generic) it is OK (!).

Note: my computer boot mode is set to Legacy (not UEFI). Motherboard: 'ASRock A320M-HDV R4.0' (BIOS v4.00).

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