4.4.0-40.60 fails to boot

Bug #1627670 reported by Chris Coulson on 2016-09-26
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Critical
Unassigned
Xenial
Critical
Joseph Salisbury

Bug Description

I've just tried both -39 and -40 in xenial-proposed, and both fail to boot on my laptop (dropping to busybox - see the attached screenshot).

This is a regression over -38, which works fine.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-38-generic 4.4.0-38.57
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: chr1s 2537 F.... pulseaudio
 /dev/snd/controlC1: chr1s 2537 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Sep 26 10:42:45 2016
HibernationDevice: RESUME=UUID=934c1be9-b0ee-4b9d-9508-7bfb0af474c9
InstallationDate: Installed on 2016-03-09 (200 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307)
MachineType: Dell Inc. Precision 7510
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-38-generic.efi.signed root=UUID=aa26703d-fe98-42ad-927a-31369b873d93 ro noprompt persistent quiet splash crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-38-generic N/A
 linux-backports-modules-4.4.0-38-generic N/A
 linux-firmware 1.157.4
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/27/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.05.04
dmi.board.name: 0692Y5
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.05.04:bd05/27/2016:svnDellInc.:pnPrecision7510:pvr:rvnDellInc.:rn0692Y5:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Precision 7510
dmi.sys.vendor: Dell Inc.

Chris Coulson (chrisccoulson) wrote :
description: updated

This change was made by a bot.

Changed in linux (Ubuntu):
status: New → Confirmed
Changed in linux (Ubuntu):
importance: Undecided → High
Changed in linux (Ubuntu Xenial):
status: New → Confirmed
importance: Undecided → High
Changed in linux (Ubuntu Xenial):
importance: High → Critical
Changed in linux (Ubuntu):
importance: High → Critical
status: Confirmed → Triaged
Changed in linux (Ubuntu Xenial):
status: Confirmed → Triaged
Joseph Salisbury (jsalisbury) wrote :

I'd like to perform a kernel bisect to figure out which commit caused this regression. We need to identify the earliest kernel that did not exhibit the bug and the first kernel that did exhibit the bug.

Can you test the following upstream kernels and post back?

v4.4.19: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.19
v4.4.20: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.20
v4.4.21: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.21

Thanks in advance!

Joseph Salisbury (jsalisbury) wrote :

The screen shot you attached is similar to the trace in bug 1626894. We identified the offending commit in that bug. Can you test the following kernel to see if its the same issue you are having? The test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1626894/30d6592-reverted/

Chris Coulson (chrisccoulson) wrote :

I was just going to say - I tested the 3 kernels in comment 3 and they all worked. I'll test http://kernel.ubuntu.com/~jsalisbury/lp1626894/30d6592-reverted/ now

Joseph Salisbury (jsalisbury) wrote :

There is a patch that may fix this issue without a revert. I built a test kernel with this patch. It can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1626894/PATCHED/

Can you test this kernel and see if it resolves this bug? You will need to install both the linux-image and linux-image-extra .deb packages.

Chris Coulson (chrisccoulson) wrote :

That test kernel works fine too.

I also have a boot issue with full root encryption never prompting for the password, also on a Dell, see:

https://bugs.launchpad.net/ubuntu/+source/linux-lts-xenial/+bug/1628546

Changed in linux (Ubuntu Xenial):
assignee: nobody → Joseph Salisbury (jsalisbury)
Changed in linux (Ubuntu):
status: Triaged → In Progress
Changed in linux (Ubuntu Xenial):
status: Triaged → In Progress
Changed in linux (Ubuntu Xenial):
status: In Progress → Fix Committed
Changed in linux (Ubuntu):
status: In Progress → Fix Committed
Changed in linux (Ubuntu):
status: Fix Committed → Fix Released
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