Comment 46 for bug 1781924

1) Yup, system not hangs up, but I feel the system response slower when it
happens. E.g. keyboard mouse not work for seconds. I can check if the
cpufreq be changed next time I get machine.

2) Not saw the over temperature by command sensors. Isn't it reported from
sysfs? If not, I can check it next time I get machine.

Kai-Heng Feng <email address hidden> 於 2019年7月24日 週三 下午4:11 寫道：

> Alex,
>
> 1) This warning should be harmless. Does it affect actual usage?
> 2) What's the temperature reports under thermal_zones sysfs?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1781924
>
> Title:
> Kernel wrong temperature reporting
>
> Status in OEM Priority Project:
> New
> 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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