The issue began after a fresh system install on a new computer. Admittedly, the first system I installed was Qubes, with Fedora (24 I believe). When I decided Qubes wasn't adequate for my needs, I wiped the system (reformatted using gparted) and installed the latest Ubuntu (as of a month ago). The kworker process was out of control in both Fedora and Ubuntu.
I have tried kernels 16, 17, and 18, latest as of about a week ago. 16 is no different than my current 15 (4.15). 17 and 18 show a 5% decrease in the kworker process. I haven't tried 4.19-rc8 yet because I thought rc was too rough for testing, but I'll try it on next boot. Am not hopeful that the problem is fixed. And, even if it is fixed in 4.19, that may not do me much good. I need virtualbox but I doubt it would run in 4.19. Plus I imagine there are more security vulnerabilities and compatibility issues with mainline testing kernels. It will probably take months to years for 18.04 to be using 4.19. Just a thought.... Best wishes, Peter -- 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: Incomplete 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
