ThinkPad T450 stutters without intel_idle.max_cstate=2

[Alan Pope 🍺🐧🐱 🦄]

I noticed my 19.10 laptop was stuttering - YouTube videos freezing. Did further investigations and the entire desktop freezes, not just the video rendering.

https://www.youtube.com/watch?v=869e9YwW0vw

Some investigation led me to https://bugzilla.kernel.org/show_bug.cgi?id=109051 and https://askubuntu.com/questions/803640/system-freezes-completely-with-intel-bay-trail

I set intel_idle.max_cstate=2 in my grub config and now the issue never happens, but I have (anecdotally) seen worse battery life as a result.

Can this be fixed in such a way that I don't have to suffer poor battery performance.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-24-generic 5.3.0-24.26
ProcVersionSignature: Ubuntu 5.3.0-24.26-generic 5.3.10
Uname: Linux 5.3.0-24-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Jan 6 16:26:20 2020
HibernationDevice: RESUME=UUID=60f73ebd-ac30-42de-968a-76a4f3332440
InstallationDate: Installed on 2018-02-04 (700 days ago)
InstallationMedia: neon userlts "Xenial" - Build amd64 LIVE Binary 20180202-11:07
MachineType: LENOVO 20BV001BUK
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-24-generic root=UUID=36ab10c5-4404-47e2-89ec-6639af6cc629 ro quiet splash noibrs noibpb nopti nospectre_v2 nospectre_v1 l1tf=off nospec_store_bypass_disable no_stf_barrier mds=off tsx=on tsx_async_abort=off mitigations=off intel_idle.max_cstate=2 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-24-generic N/A
 linux-backports-modules-5.3.0-24-generic N/A
 linux-firmware 1.183.3
SourcePackage: linux
UpgradeStatus: Upgraded to eoan on 2019-09-19 (109 days ago)
dmi.bios.date: 08/14/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: JBET73WW (1.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BV001BUK
dmi.board.vendor: LENOVO
dmi.board.version: 0B98417 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrJBET73WW(1.37):bd08/14/2019:svnLENOVO:pn20BV001BUK:pvrThinkPadT450:rvnLENOVO:rn20BV001BUK:rvr0B98417WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T450
dmi.product.name: 20BV001BUK
dmi.product.sku: LENOVO_MT_20BV_BU_Think_FM_ThinkPad T450
dmi.product.version: ThinkPad T450
dmi.sys.vendor: LENOVO

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

This change was made by a bot.

[Alan Pope 🍺🐧🐱 🦄 (popey)]

I have upgraded to focal, am now running 5.4.0-9-generic and no longer see the issue