apport information ** Attachment added: "UdevDb.txt" https://bugs.launchpad.net/bugs/1864527/+attachment/5330681/+files/UdevDb.txt
-- 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/1864527 Title: CPU0 is busy after S3 in Dell Precision 3530 Status in linux package in Ubuntu: Incomplete 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). --- 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1864527/+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
