Comment 0 for bug 1808418

I've used Ubuntu on this specific machine for years without problems, but starting with the 4.13 kernel that came with the 17.10 HWE and continuing into 18.04 kernels my computer would no longer boot, hanging at various screens:

- A blank screen with a flashing cursor
- A screen with this message:
Loading Linux 4.13.0.36-generic ...
Loading initial ramdisk ...
- A screen with kernel messages, ending in:
APCI: EC: interrupt blocked

I've encountered the bug in a number of kernels, including:
- 4.13.0-32
- 4.13.0-36
- 4.13.0-37
- 4.15.0-24
- 4.15.0-34
- 4.15.0-36
- 4.15.0-38

I was able to work around the issue by adding noapic to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default grub, e.g.:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noapic"

I'm not entirely sure of the consequences of this workaround, but one thing I've noticed is significantly reduced battery life.

I'll attach screenshots of various times I've encountered this bug over the last year.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-42-generic 4.15.0-42.45
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: bryan 2349 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Dec 13 15:31:15 2018
HibernationDevice: RESUME=UUID=4afa8032-cfe5-45f4-a626-738ab33904ac
InstallationDate: Installed on 2014-05-08 (1680 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: LENOVO 3351CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-42-generic root=UUID=cffbc87d-956b-4986-94df-b3b64ae5237f ro quiet splash noapic vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-42-generic N/A
 linux-backports-modules-4.15.0-42-generic N/A
 linux-firmware 1.173.2
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2018-07-12 (154 days ago)
dmi.bios.date: 06/01/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: H6ETA0WW (2.18 )
dmi.board.asset.tag: Not Available
dmi.board.name: 3351CTO
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrH6ETA0WW(2.18):bd06/01/2018:svnLENOVO:pn3351CTO:pvrThinkPadT430u:rvnLENOVO:rn3351CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T430u
dmi.product.name: 3351CTO
dmi.product.version: ThinkPad T430u
dmi.sys.vendor: LENOVO