lsb_release -rd
Description: Ubuntu 14.04.3 LTS (up-to-date packages)
Release: 14.04
USB3-plugged devices do not function early in the boot process. This includes USB2 devices plugged into USB3 ports, but does not include USBx devices plugged into USB2 ports (these work fine).
To reproduce:
1. plug keyboard into USB3 port, computer off
2. boot
3. attempt to select options in the GRUB menu
Observed outcome:
Selection of boot options is not possible
Expected outcome:
Selection of boot options is possible
Also, a few people have noticed that they can't boot from media plugged into their USB3 ports, for example a flash drive with a Live CD image on it. (e.g. http://ubuntuforums.org/showthread.php?t=1628665)
I guess this has something to do with whether the usb3 drivers are available at this early stage of boot: later on, after the full kernel is loaded, USB3 works fine.
I know I could plug my keyboard into a USB2 port as it was before, but I have these new monitors that have got only USB3 ports on them, and it's physically more convenient to plug keyboard & mouse into them than the workstation itself (Dell T7600), which is a bit far for the cables to reach.
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ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: mdoube 2897 F.... pulseaudio
/dev/snd/controlC1: mdoube 2897 F.... pulseaudio
/dev/snd/controlC0: mdoube 2897 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=8629e880-0342-46f8-9392-7b5444e0ef96
InstallationDate: Installed on 2015-10-12 (112 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64+mac (20150805)
MachineType: Dell Inc. Precision T7600
NonfreeKernelModules: nvidia
Package: linux (not installed)
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-47-generic root=UUID=7ce67a28-3ea8-4919-8a6e-f57670d56652 ro quiet splash
ProcVersionSignature: Ubuntu 3.19.0-47.53~14.04.1-generic 3.19.8-ckt10
RelatedPackageVersions:
linux-restricted-modules-3.19.0-47-generic N/A
linux-backports-modules-3.19.0-47-generic N/A
linux-firmware 1.127.20
RfKill:
Tags: trusty
Uname: Linux 3.19.0-47-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 09/29/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.asset.tag: RVCDoube0
dmi.board.name: 082WXT
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.asset.tag: RVCDoube0
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd09/29/2014:svnDellInc.:pnPrecisionT7600:pvr01:rvnDellInc.:rn082WXT:rvrA01:cvnDellInc.:ct7:cvr:
dmi.product.name: Precision T7600
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
That is very odd since the usb drivers are built into the kernel these days so are immediately available.