On your system, this is in kernel message:
[ 0.104005] ACPI: GPE 0x6F active on init
I just tested Precision 3630 Tower in our lab, no such message, and I
don't see the issue here.
/sys/firmware/acpi/interrupts/gpe6F stays at 0 all the time.
Can you try "restore default settings" in BIOS?
** Also affects: dell-sputnik
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1799235
Title:
kworker process starts at 85% of cpu and stays there
Status in Dell Sputnik:
New
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.
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