This fix (HID: i2c-hid: Reset ALPS touchpads on resume) has been applied
to eoan/linux as part of Eoan upstream stable patchset (bug 1861710).
** Changed in: linux (Ubuntu Eoan)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1864527
Title:
CPU0 is busy after S3 in Dell Precision 3530
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Eoan:
Fix Committed
Status in linux source package in Focal:
Fix Released
Bug description:
CPU0 (and sometimes other cores too) is not entering C10 half of the
time when system is idle. "top" shows a touchpad driver takes 5%~6% of
CPU usage, and "/proc/interrupts" reveals considerable interrupts from
the touchpad device. This results in additional 4~5 watt power
consumption.
This anomaly can be workarounded by simply touching the touchpad - in
other words, it is more visible when using a USB mouse.
This can be fixed by a kernel 5.5 commit 52cf93e63ee6 which is included in
bionic (4.15) and focal kernel (5.4) but not in eoan (5.3).
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ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.11
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alexhung 3397 F.... pulseaudio
/dev/snd/pcmC0D0p: alexhung 3397 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2019-10-29 (118 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
MachineType: Dell Inc. Precision 3530
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-40-generic
root=UUID=b0c947ea-9aa0-4ca2-a634-7b925900c129 ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 5.3.0-40.32~18.04.1-generic 5.3.18
RelatedPackageVersions:
linux-restricted-modules-5.3.0-40-generic N/A
linux-backports-modules-5.3.0-40-generic N/A
linux-firmware 1.173.14
Tags: bionic
Uname: Linux 5.3.0-40-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 01/30/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 99.6.4
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr99.6.4:bd01/30/2018:svnDellInc.:pnPrecision3530:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr:
dmi.product.family: Precision
dmi.product.name: Precision 3530
dmi.product.sku: 0820
dmi.sys.vendor: Dell Inc.
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