** Changed in: oem-priority
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1781924
Title:
Kernel wrong temperature reporting
Status in OEM Priority Project:
Won't Fix
Status in linux package in Ubuntu:
Expired
Bug description:
I'm having some thermal trouble since I've started using kernel >4.0.x
with my new laptop. According to psensor and sensord, CPU temperature
jumps above the 90C, stays there for around 1second, and goes back to
50C. All transitions happen in around 100ms. I've cleaned and re-
applied thermal paste and checked the connections twice. More
interestingly, this doesn't happen when the CPU is under heavy-load,
but when it is waiting idly. Sometimes sensord reports the CPU temp
has gone over the critical threshold of the CPU and device shuts down
itself immediately.
There is also Windows 10 installed as a dual boot and didn't see this
problem on it when idle or under heavy load.
Dmesg output is full of following warnings;
[ 1282.296247] CPU0: Core temperature above threshold, cpu clock throttled
(total events = 109)[ 1282.296267] CPU4: Core temperature above threshold, cpu
clock throttled (total events = 109)
[ 1282.296269] CPU5: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296269] CPU1: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296271] CPU4: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296272] CPU6: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296273] CPU2: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296274] CPU7: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296275] CPU3: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.296281] CPU0: Package temperature above threshold, cpu clock throttled
(total events = 220)
[ 1282.297226] CPU4: Core temperature/speed normal
[ 1282.297227] CPU5: Package temperature/speed normal
[ 1282.297228] CPU0: Core temperature/speed normal
[ 1282.297229] CPU1: Package temperature/speed normal
[ 1282.297229] CPU0: Package temperature/speed normal
[ 1282.297230] CPU4: Package temperature/speed normal
[ 1282.297233] CPU3: Package temperature/speed normal
[ 1282.297233] CPU7: Package temperature/speed normal
[ 1282.297269] CPU2: Package temperature/speed normal
[ 1282.297269] CPU6: Package temperature/speed normal
Because of wrong temperature reporting, kernel throttles the CPU and
reduces overall performance, which results in frustrating user
experience.
I've tried followings and find a temporary solution;
- intel_pstate enabled, turbo-boost enabled > problem exists
- intel_pstate enabled, turbo-boost disabled > problem frequency reduced
- intel_pstate disabled, governor set to anythig other than powersave >
problem exists
- intel_pstate disabled, governor set to powersave > problem frequency
reduced
I'm suspicious about a kernel bug such as;
- https://bugzilla.redhat.com/show_bug.cgi?id=924570
- https://bugzilla.redhat.com/show_bug.cgi?id=1317190
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D7p: burak 1547 F...m pulseaudio
/dev/snd/controlC0: burak 1547 F.... pulseaudio
CurrentDesktop: X-Cinnamon
DistroRelease: Linux Mint 19
HibernationDevice: RESUME=UUID=60a9fd7e-ec69-448a-b19a-93efaa6035ed
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04f3:0903 Elan Microelectronics Corp.
Bus 001 Device 003: ID 8087:0a2b Intel Corp.
Bus 001 Device 002: ID 045e:07a5 Microsoft Corp. Wireless Receiver 1461C
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX430UNR
NonfreeKernelModules: nvidia_modeset nvidia
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-24-generic
root=UUID=692de7fe-530f-4849-89ec-a5b4413af7dc ro quiet splash
intel_pstate=disable vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-24-generic N/A
linux-backports-modules-4.15.0-24-generic N/A
linux-firmware 1.173.1
Tags: tara
Uname: Linux 4.15.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 11/28/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX430UNR.302
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX430UNR
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrUX430UNR.302:bd11/28/2017:svnASUSTeKCOMPUTERINC.:pnUX430UNR:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX430UNR:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: UX
dmi.product.name: UX430UNR
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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