I have the same problem. I have the Asus Maximus VII Hero (Z97) and the same errors occur. On my PC I have elementary OS 0.3.2 (based on Ubuntu 14.04) installed. While booting with 'normal' bios setting and a USB3.0 HDD my keyboard and mouse (and basically all USB devices) stop working. When disabling the Intel xHCI Mode in the bios there is absolutely no problem. A friend of mine has an Asus Z97-A and he runs Arch and has exactly the same problem.
Update: I flashed my bios to the newest firmware (3003) and with xHCI enabled in the bios my USB3.0 HDD still doesn't work, but all my other devices don't have any problems. -- 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 Status in linux package in Debian: New 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
