The kernel in use is now 5.11.0-25-generic but the symptoms remain the same.
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- 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/1931845 Title: Lots of cme when using 5.8.0 but not with 5.4.0 Status in linux package in Ubuntu: Confirmed Bug description: I'm using a 20.04.2 LTS install on a t470 thinkpad. After installing the linux-image-generic-hwe-20.04 the boot kernel switched to 5.8.0.55 when a lot of mce messages appeared in the kernel log, e.g. kern.log, e.g.: Jun 14 10:57:50 monster kernel: [ 0.627088] mce: [Hardware Error]: CPU 1: Machine Check: 0 Bank 3: 8c40004000100151 Jun 14 10:57:50 monster kernel: [ 0.627089] mce: [Hardware Error]: TSC c619c16f1 ADDR 4414b2940 MISC 306485 Jun 14 10:57:50 monster kernel: [ 0.627090] mce: [Hardware Error]: PROCESSOR 0:806e9 TIME 1623661045 SOCKET 0 APIC 2 microcode de Using rasdaemon and the fixed ras-mc-ctl script from upstream this got elaborated to $ ras-mc-ctl --errors --snip-- 188 2021-06-14 10:54:21 +0200 error: Instruction CACHE Level-1 Instruction-Fetch Error, mcg mcgstatus=0, mci Error_overflow Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0xcc400e8000100151, addr=0x2146b9240, misc=0x00516485, walltime=0x60c7193d, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003 189 2021-06-14 10:54:22 +0200 error: Instruction CACHE Level-1 Instruction-Fetch Error, mcg mcgstatus=0, mci Error_overflow Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0xcc40020000100151, addr=0x4344eee40, misc=0x02526485, walltime=0x60c7193e, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003 190 2021-06-14 10:54:26 +0200 error: Instruction CACHE Level-1 Instruction-Fetch Error, mcg mcgstatus=0, mci Error_overflow Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0xcc40064000100151, addr=0x21447e7c0, misc=0x02526485, walltime=0x60c71942, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003 --snap-- Is this just better reporting by the 5.8 kernel or is this a mismatch of kernel and hardware? I have no sudden application crashes or other indications for failing hardware. And a few hours of memtest86+ (not the broken version from the repo but a current one from a boot cd) report no errors. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.18 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: yannek 5763 F.... pulseaudio /dev/snd/controlC0: yannek 5763 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: KDE DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2021-01-26 (204 days ago) InstallationMedia: Kubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) MachineType: LENOVO 20HES0FW00 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.11.0-25-generic root=/dev/mapper/vgkubuntu-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.11.0-25.27~20.04.1-generic 5.11.22 RelatedPackageVersions: linux-restricted-modules-5.11.0-25-generic N/A linux-backports-modules-5.11.0-25-generic N/A linux-firmware 1.187.16 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: focal Uname: Linux 5.11.0-25-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 10/19/2020 dmi.bios.release: 1.65 dmi.bios.vendor: LENOVO dmi.bios.version: N1QET90W (1.65 ) dmi.board.asset.tag: Not Available dmi.board.name: 20HES0FW00 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.35 dmi.modalias: dmi:bvnLENOVO:bvrN1QET90W(1.65):bd10/19/2020:br1.65:efr1.35:svnLENOVO:pn20HES0FW00:pvrThinkPadT470:rvnLENOVO:rn20HES0FW00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T470 dmi.product.name: 20HES0FW00 dmi.product.sku: LENOVO_MT_20HE_BU_Think_FM_ThinkPad T470 dmi.product.version: ThinkPad T470 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1931845/+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