I'm not sure if this is related but just in case. I upgraded from 16.04.1 LTS to 18.04.2 - straight after I started getting alarms from my SNMP monitoring, low voltage VBat etc. Upon checking the sensors output I can see it's all messed up:
Linux host.no.domain 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux root@host:/# sensors it8728-isa-0a20 Adapter: ISA adapter in0: +2.24 V (min = +2.32 V, max = +0.77 V) ALARM in1: +2.24 V (min = +2.83 V, max = +0.67 V) ALARM in2: +3.06 V (min = +1.68 V, max = +1.54 V) ALARM +3.3V: +3.41 V (min = +0.77 V, max = +0.31 V) ALARM in4: +2.24 V (min = +0.84 V, max = +0.65 V) ALARM in5: +2.24 V (min = +1.58 V, max = +1.64 V) ALARM in6: +2.24 V (min = +0.05 V, max = +2.36 V) 3VSB: +3.41 V (min = +1.66 V, max = +4.73 V) Vbat: +0.14 V fan1: 0 RPM (min = 13 RPM) ALARM fan2: 2027 RPM (min = 11 RPM) fan3: 0 RPM (min = 25 RPM) ALARM temp1: +54.0°C (low = +101.0°C, high = +14.0°C) ALARM sensor = thermal diode temp2: +55.0°C (low = +40.0°C, high = +7.0°C) ALARM sensor = Intel PECI temp3: -128.0°C (low = +17.0°C, high = +26.0°C) sensor = disabled intrusion0: ALARM acpitz-virtual-0 Adapter: Virtual device temp1: +27.8°C (crit = +106.0°C) temp2: +29.8°C (crit = +106.0°C) coretemp-isa-0000 Adapter: ISA adapter Package id 0: +57.0°C (high = +87.0°C, crit = +105.0°C) Core 0: +55.0°C (high = +87.0°C, crit = +105.0°C) Core 1: +56.0°C (high = +87.0°C, crit = +105.0°C) CPU temperatures and fan speed are probably OK but voltages are certainly not. May be a red-herring - just thought I should bring it up. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1768976 Title: Ubuntu 18.04 is overheating after upgrade from 16.04 Status in linux package in Ubuntu: Confirmed Status in xserver-xorg-video-nouveau package in Ubuntu: Confirmed Bug description: Ubuntu is overheating at my laptop. Opening youtube on firefox is enough for critical temperature shutdown. Using lm-sensors for monitoring on 18.04 the temp varies between 70 and 85°C with only firefox or chrome open and doing nothing. On my old 16.04 with same using, the temp varies between 55 and 70°C. First thought was the driver nouveau is the problem, and finally I was able to install by add "nouveau.modeset=0" at livecd boot options, without temp shutdown. After install I disable the nouveau at modprobe blacklist, but the system continues overheating and shutdown with basic usage. I have no idea what's happening with the bionic at my laptop. My laptop is a Samsung RF411 i5 2nd Generation and Geforce 540M. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.17 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Thu May 3 16:22:40 2018 InstallationDate: Installed on 2018-04-27 (6 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: dist-upgrade UpgradeStatus: No upgrade log present (probably fresh install) VarLogDistupgradeAptHistorylog: Start-Date: 2018-04-27 15:46:02 End-Date: 2018-04-27 15:46:02 VarLogDistupgradeAptlog: Log time: 2018-04-27 15:45:39.753331 Starting pkgProblemResolver with broken count: 0 Starting 2 pkgProblemResolver with broken count: 0 Done Log time: 2018-04-27 15:46:04.859979 VarLogDistupgradeApttermlog: Log started: 2018-04-27 15:46:02 Log ended: 2018-04-27 15:46:02 --- .tmp.unity_support_test.0: ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: edir 2354 F.... pulseaudio CompositorRunning: None DistUpgraded: Fresh install DistroCodename: bionic DistroRelease: Ubuntu 18.04 DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.271+bdcom, 4.15.0-20-generic, x86_64: installed bcmwl, 6.30.223.271+bdcom, 4.15.0-22-generic, x86_64: installed GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Samsung Electronics Co Ltd 2nd Generation Core Processor Family Integrated Graphics Controller [144d:c0a5] Subsystem: Samsung Electronics Co Ltd GF108M [GeForce GT 540M] [144d:c0a5] HibernationDevice: RESUME=UUID=e7a61aee-64c2-4c88-b4e1-4de481d0f88d InstallationDate: Installed on 2018-04-27 (36 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. RF511/RF411/RF711 NonfreeKernelModules: wl Package: xserver-xorg-video-nouveau 1:1.0.15-2 PackageArchitecture: amd64 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-22-generic root=UUID=db38a22c-0e9f-4e1a-b9f7-f7aac2544394 ro quiet splash nouveau.runpm=0 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.15.0-22-generic N/A linux-backports-modules-4.15.0-22-generic N/A linux-firmware 1.173.1 Tags: bionic ubuntu Uname: Linux 4.15.0-22-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 04/26/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 10HX.M034.20110426.SSH dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: RF511/RF411/RF711 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: 10HX dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr10HX.M034.20110426.SSH:bd04/26/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pnRF511/RF411/RF711:pvr10HX:rvnSAMSUNGELECTRONICSCO.,LTD.:rnRF511/RF411/RF711:rvr10HX:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A: dmi.product.family: To be filled by O.E.M. dmi.product.name: RF511/RF411/RF711 dmi.product.version: 10HX dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1 version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1768976/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp