Ubuntu does not boot on kernel 5.14.4

[Ian Leath]

I built linux 5.14.4 from kernel.org on my Dell XPS 7590, but Ubuntu 21.04 fails to load if I boot into it, getting stuck on "Loading initial ramdisk" even when using verbose mode and recovery mode. It never moves past this point and I end up having to hard reboot the laptop into a stable kernel. I made them into a package for easy installation/uninstallation.
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu65.3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ian 5081 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 21.04
InstallationDate: Installed on 2021-07-22 (56 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
MachineType: Dell Inc. XPS 15 7590
NonfreeKernelModules: nvidia_modeset nvidia
Package: linux (not installed)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-34-generic root=UUID=7cce21e7-6064-4d17-9431-1c4fd9ccea0e ro mem_sleep_default=deep dis_ucode_ldr
ProcVersionSignature: Ubuntu 5.11.0-34.36-generic 5.11.22
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-34-generic N/A
 linux-backports-modules-5.11.0-34-generic N/A
 linux-firmware 1.197.3
Tags: hirsute
Uname: Linux 5.11.0-34-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/22/2021
dmi.bios.release: 1.13
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.13.0
dmi.board.name: 0VYV0G
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.13.0:bd07/22/2021:br1.13:svnDellInc.:pnXPS157590:pvr:sku0905:rvnDellInc.:rn0VYV0G:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 15 7590
dmi.product.sku: 0905
dmi.sys.vendor: Dell Inc.

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

Bug reporting is about finding & fixing problems thus preventing future users from hitting the same bug.

I suspect a Support site would be more appropriate, eg. https://answers.launchpad.net/ubuntu. You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org, or for more support options please look at https://discourse.ubuntu.com/t/community-support/709

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1943782

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

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[Ian Leath (meganium97)]

I uninstalled the kernel previous to running the command, should I run it again with the kernel mentioned installed?