Please add some debugging output to /lib/udev/hdparm with sudo sed -i '2 s_^_set -x; exec 2>/tmp/hdparm.txt_' /lib/udev/hdparm
then re-run the event with sudo udevadm trigger --action=add /sys/block/sda --verbose then attach /tmp/hdparm.txt here. Thanks! ** Package changed: systemd (Ubuntu) => hdparm (Ubuntu) ** Changed in: hdparm (Ubuntu) Status: New => Incomplete ** Summary changed: - systemd-udevd[473]: Process '/lib/udev/hdparm' failed with exit code 5. + Process '/lib/udev/hdparm' failed with exit code 5 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1568474 Title: Process '/lib/udev/hdparm' failed with exit code 5 Status in hdparm package in Ubuntu: Incomplete Bug description: get that error logged on a fully upgraded (proposed archive enabled) xenial 64 bits system (hdparm 9.48+ds-1) Searching about systemd-udevd.service, it is found into /lib/systemd/ but there is a problem: oem@u64:~$ ls -l systemd-udevd.service ls: cannot access 'systemd-udevd.service': No such file or directory ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: systemd 229-4ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Uname: Linux 4.4.0-18-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 CurrentDesktop: GNOME Date: Sun Apr 10 11:41:07 2016 Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 046d:c062 Logitech, Inc. M-UAS144 [LS1 Laser Mouse] Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: ASUSTEK COMPUTER INC P5W DH Deluxe ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-18-generic root=UUID=7c755ed6-51cc-4b75-88ac-9c75acf82749 ro SourcePackage: systemd SystemdDelta: [EXTENDED] /etc/systemd/system/display-manager.service → /lib/systemd/system/display-manager.service.d/xdiagnose.conf [EXTENDED] /lib/systemd/system/systemd-timesyncd.service → /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf [EXTENDED] /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf 3 overridden configuration files found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/22/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3002 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P5W DH Deluxe dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd07/22/2010:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: P5W DH Deluxe dmi.product.version: System Version dmi.sys.vendor: ASUSTEK COMPUTER INC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/1568474/+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