** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1799235
Title: kworker process starts at 85% of cpu and stays there Status in linux package in Ubuntu: Confirmed Bug description: Ubuntu starts, w/ /sbin/init, a kworker process that never stops running below 85%: pb@pb-tower:~/Downloads$ ps -elf F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD 4 S root 1 0 0 80 0 - 56471 - 18:30 ? 00:00:01 /sbin/init splash 1 S root 2 0 0 80 0 - 0 - 18:30 ? 00:00:00 [kthreadd] 1 R root 85 2 63 80 0 - 0 - 18:30 ? 00:03:03 [kworker/0:1+kac] After a few hours, grep . -r /sys/firmware/acpi/interrupts/ shows tens of millions of interrupts. The following command line stops the kworker process: echo "disable" > /sys/firmware/acpi/interrupts/gpe6F On the other hand, I haven't been able to properly shut down my system after this command (power never goes off except manually). I believe the bug is related to the one discussed here: https://superuser.com/questions/1117992/acpi-exception-ae-not-found- while-evaluating-gpe-method-floods-syslog The dmesg w/ this report may be somewhat confusing because there is an unsigned module. But w/ the module removed, dmesg gives the following: [ 0.097480] ACPI: Dynamic OEM Table Load: [ 0.097480] ACPI: SSDT 0xFFFFA07F57173000 000317 (v02 PmRef ApHwp 00003000 INTL 20160527) [ 0.097480] ACPI: Executed 1 blocks of module-level executable AML code [ 0.100180] ACPI: Dynamic OEM Table Load: [ 0.100186] ACPI: SSDT 0xFFFFA07F577EF400 00030A (v02 PmRef ApCst 00003000 INTL 20160527) [ 0.100473] ACPI: Executed 1 blocks of module-level executable AML code [ 0.102187] ACPI: Interpreter enabled [ 0.102222] ACPI: (supports S0 S3 S4 S5) [ 0.102223] ACPI: Using IOAPIC for interrupt routing [ 0.102275] HEST: Table parsing has been initialized. [ 0.102277] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 0.103580] ACPI: GPE 0x20 active on init [ 0.104031] ACPI Error: No handler for Region [WST1] ( (ptrval)) [GenericSerialBus] (20170831/evregion-166) [ 0.104035] ACPI Error: Region GenericSerialBus (ID=9) has no handler (20170831/exfldio-299) [ 0.104040] Initialized Local Variables for Method [PAS1]: [ 0.104041] Local0: (ptrval) <Obj> Integer 0000000000000001 [ 0.104045] No Arguments are initialized for method [PAS1] [ 0.104046] ACPI Error: Method parse/execution failed \_SB.PCI0.I2C0.PAS1, AE_NOT_EXIST (20170831/psparse-550) [ 0.104052] ACPI Error: Method parse/execution failed \_GPE._L20, AE_NOT_EXIST (20170831/psparse-550) [ 0.104058] ACPI Exception: AE_NOT_EXIST, while evaluating GPE method [_L20] (20170831/evgpe-646) [ 0.104005] ACPI: GPE 0x6F active on init [ 0.104005] ACPI: Enabled 10 GPEs in block 00 to 7F [ 0.212126] ACPI: Power Resource [USBC] (on) [ 0.444270] pci 0000:06:00.0: PME# supported from D0 D1 D2 D3hot [ 0.444270] pci 0000:06:00.1: [1033:00e0] type 00 class 0x0c0320 [ 0.444270] pci 0000:06:00.1: reg 0x10: [mem 0xa2000000-0xa20000ff] [ 0.444278] pci 0000:06:00.1: supports D1 D2 [ 0.444278] pci 0000:06:00.1: PME# supported from D0 D1 D2 D3hot [ 0.444278] pci 0000:05:00.0: PCI bridge to [bus 06] [ 0.444278] pci 0000:05:00.0: bridge window [mem 0xa2000000-0xa20fffff] [ 0.456183] ACPI: PCI Interrupt Link [LNKA] (IRQs) *0 [ 0.456183] ACPI: PCI Interrupt Link [LNKB] (IRQs) *1 [ 0.456183] ACPI: PCI Interrupt Link [LNKC] (IRQs) *0 [ 0.456183] ACPI: PCI Interrupt Link [LNKD] (IRQs) *1 [ 0.456183] ACPI: PCI Interrupt Link [LNKE] (IRQs) *1 [ 0.456183] ACPI: PCI Interrupt Link [LNKF] (IRQs) *1 [ 0.456183] ACPI: PCI Interrupt Link [LNKG] (IRQs) *1 [ 0.456183] ACPI: PCI Interrupt Link [LNKH] (IRQs) *1 [ 0.464184] SCSI subsystem initialized [ 0.464186] libata version 3.00 loaded. [ 0.464186] pci 0000:00:02.0: vgaarb: setting as boot VGA device [ 1.225495] Scanning for low memory corruption every 60 seconds [ 1.226265] Initialise system trusted keyrings [ 1.226271] Key type blacklist registered [ 1.226399] workingset: timestamp_bits=36 max_order=23 bucket_order=0 [ 1.227127] zbud: loaded [ 1.227482] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 1.227769] fuse init (API version 7.26) [ 1.233972] Key type asymmetric registered [ 1.233973] Asymmetric key parser 'x509' registered [ 1.233991] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246) [ 1.234105] io scheduler noop registered [ 1.234105] io scheduler deadline registered [ 1.234131] io scheduler cfq registered (default) [ 1.238792] pcieport 0000:00:1b.0: AER enabled with IRQ 122 [ 1.238819] pcieport 0000:00:1b.4: AER enabled with IRQ 123 [ 1.238845] pcieport 0000:00:1d.2: AER enabled with IRQ 124 [ 1.238863] dpc 0000:00:1b.0:pcie010: DPC error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 4, DL_ActiveErr+ [ 1.238874] dpc 0000:00:1b.4:pcie010: DPC error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 4, DL_ActiveErr+ [ 1.238886] dpc 0000:00:1d.2:pcie010: DPC error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 4, DL_ActiveErr+ [ 1.238925] efifb: probing for efifb [ 1.378346] ACPI: Thermal Zone [TZ00] (28 C) [ 1.378390] ERST: Error Record Serialization Table (ERST) support is initialized. [ 1.378391] pstore: using zlib compression [ 1.378393] pstore: Registered erst as persistent store backend [ 1.378456] GHES: APEI firmware first mode is enabled by APEI bit. [ 1.378659] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 1.400977] 00:01: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A [ 1.405952] Linux agpgart interface v0.103 [ 1.433815] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFC, rev-id 1) [ 1.444950] tpm tpm0: A TPM error (2314) occurred continue selftest [ 1.798436] loop: module loaded ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-36-generic 4.15.0-36.39 ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 Uname: Linux 4.15.0-36-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: pm 2353 F.... pulseaudio /dev/snd/controlC1: pm 2353 F.... pulseaudio Date: Mon Oct 22 09:21:42 2018 HibernationDevice: RESUME=UUID=5636f256-e713-4bd0-a4f0-535a151ca3b1 InstallationDate: Installed on 2018-09-19 (32 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 003: ID 8087:0025 Intel Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. Precision 3630 Tower ProcEnviron: LANGUAGE= TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-36-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash 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-4.15.0-36-generic N/A linux-backports-modules-4.15.0-36-generic N/A linux-firmware 1.173.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/30/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.0.1 dmi.board.name: 0NNNCT dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.0.1:bd05/30/2018:svnDellInc.:pnPrecision3630Tower:pvr:rvnDellInc.:rn0NNNCT:rvrA00:cvnDellInc.:ct3:cvr: dmi.product.family: Precision dmi.product.name: Precision 3630 Tower dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+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
