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-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to bluez in Ubuntu. https://bugs.launchpad.net/bugs/1759836 Title: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez Status in linux: Confirmed Status in The Ubuntu Power Consumption Project: New Status in bluez package in Ubuntu: Fix Released Status in linux package in Ubuntu: Invalid Status in systemd package in Ubuntu: Invalid Status in bluez source package in Bionic: Fix Committed Status in linux source package in Bionic: Invalid Status in systemd source package in Bionic: Invalid Status in bluez source package in Disco: Fix Released Status in linux source package in Disco: Invalid Status in systemd source package in Disco: Invalid Status in bluez source package in Eoan: Fix Released Status in linux source package in Eoan: Invalid Status in systemd source package in Eoan: Invalid Status in bluez package in Debian: New Bug description: [impact] on specific Dell systems, with a specific usb bluetooth device built- in, the udev rule 'hid2hci' provided by the 'bluez' package causes an endless loop of uevents resulting from 'bind' or 'unbind' kernel uevents. These new events were added to the kernel after the 'hid2hci' udev rule was written. [test case] the specific Dell system is required to be able to reproduce this, or at least the specific usb bluetooth hardware included in that system. Reproducing this is reportedly easy, for example comment 75 indicates it happens on every boot. When this happens, any process monitor (e.g. ps, top, etc) will show the 'udevd' process using 100% of a cpu, and 'udevadm monitor' should show repeated 'bind' and 'unbind' events as mentioned in comment 39. [regression potential] as this alters what kernel uevents the 'hid2hci' udev rule processes, regressions would involve the affected usb bluetooth device failing to be set up, or otherwise not processing the uevents correctly. [other info] this is not fixed yet upstream, as of my last check, but has been submitted upstream as mentioned in comment 95. original description: -- The systemd-udevd proccess consumes 100% of a thread everytime, but i'm not noticing any difference in my computer. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: systemd 237-3ubuntu6 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 Uname: Linux 4.15.0-13-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.9-0ubuntu2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu Mar 29 08:52:54 2018 InstallationDate: Installed on 2018-03-05 (23 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180304) MachineType: Dell Inc. Inspiron N5010 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic root=UUID=3c29e292-f1ae-45e1-a0ed-a82524278ce1 ro quiet splash vt.handoff=1 SourcePackage: systemd SystemdDelta: [EXTENDED] /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf [EXTENDED] /lib/systemd/system/user@.service → /lib/systemd/system/user@.service.d/timeout.conf 2 overridden configuration files found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/25/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A12 dmi.board.name: 08R0GW dmi.board.vendor: Dell Inc. dmi.board.version: A12 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A12 dmi.modalias: dmi:bvnDellInc.:bvrA12:bd01/25/2011:svnDellInc.:pnInspironN5010:pvrA12:rvnDellInc.:rn08R0GW:rvrA12:cvnDellInc.:ct8:cvrA12: dmi.product.name: Inspiron N5010 dmi.product.version: A12 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/kernel/+bug/1759836/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
