I have the sane bug, "error -110" USB error messages, and when I reboot, the computer's UEFI initialisation during boot, at the USB device stage, is very slow.
The problem gets fixed temporarily, if you unplug the computer from the power socket (or turn off the power switch, at the back of the computer), and leave it off until the motherboard loses all its power. It looks like it is some kernel 3.19 bug with USB ports. Some USB ports remain powered on, if you shutdown the computer, for charging devices, etc. If you remove the power plug, all USB ports turn off, so the issue gets fixed, until the issue reappears at some random tie, when the kernel gets loaded again. The issue does not exist with buntus 14.04/14.04.2, and 14.10. -- 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/1437492 Title: boot stalls on USB detection errors Status in linux package in Ubuntu: Confirmed Bug description: My system boots slow. I investigated this and it seems systemd-udev-settle.service is the culprit. My system runs ext4 with GPT on UEFI. I do not use encryption or LVM. $ journalctl -u systemd-udev-settle -- Logs begin at fri 2015-03-27 19:03:06 CET, end at fri 2015-03-27 22:06:32 CET. -- mar 27 19:03:42 hostname systemd[1]: Started udev Wait for Complete Device Initialization. $ systemd-analyze Startup finished in 14.865s (firmware) + 11.133s (loader) + 6.127s (kernel) + 42.079s (userspace) = 1min 14.206s $ systemd-analyze critical-chain http://paste.ubuntu.com/10691416/ $ systemd-analyze blame 36.013s systemd-udev-settle.service http://paste.ubuntu.com/10691314/ $ systemctl show systemd-udev-settle.service -p RequiredBy RequiredBy= $ systemctl show systemd-udev-settle.service -p WantedBy WantedBy=friendly-recovery.service $ systemd-analyze plot > boot.svg http://imgh.us/boot_1.svg $ systemd-analyze dump http://paste.ubuntu.com/10691856/ ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: systemd 219-5ubuntu1 ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2 Uname: Linux 3.19.0-10-generic x86_64 ApportVersion: 2.16.2-0ubuntu5 Architecture: amd64 CurrentDesktop: GNOME-Flashback:Unity Date: Fri Mar 27 22:05:28 2015 InstallationDate: Installed on 2013-12-26 (455 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: ASUS All Series ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-10-generic.efi.signed root=UUID=31dc4488-28d4-4d2a-aa51-6733e237d5f8 ro quiet splash vt.handoff=7 SourcePackage: systemd UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/18/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2103 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z87-PRO 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.:bvr2103:bd08/18/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ87-PRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: All Series dmi.product.version: System Version dmi.sys.vendor: ASUS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1437492/+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
