Lenovo ThinkPad T480/T480s/X1: Throttling CPU issue
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
thermald (Arch Linux) |
New
|
Undecided
|
Unassigned | ||
thermald (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
On Linux OS the CPU package power limit (PL1/2) is set wrong reducing drastically CPU performance under load.
Apparently many Lenovo laptops (certified for Ubuntu) are affected.
The problem is described in details here: https:/
There is "hacky" workaround (not compatible with SecureBoot, a Python script writing MSR registers periodically) : https:/
There is also a thread on Lenovo forum: https:/
I confirm the issue affect my machine running the latest kernel (4.15.0-45-generic, although bug affects previous releases as well) and using the latest firmware from Lenovo (1.19).
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-
ProcVersionSign
Uname: Linux 4.15.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC0D0p: afiergol 4050 F...m pulseaudio
/dev/snd/
CurrentDesktop: GNOME
Date: Fri Feb 8 17:14:17 2019
HibernationDevice: RESUME=
InstallationDate: Installed on 2018-04-05 (309 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
MachineType: LENOVO 20L6S04200
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.173.3
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2018-08-22 (170 days ago)
dmi.bios.date: 11/07/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: N24ET44W (1.19 )
dmi.board.
dmi.board.name: 20L6S04200
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.family: ThinkPad T480
dmi.product.name: 20L6S04200
dmi.product.
dmi.sys.vendor: LENOVO
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