Seb R., as per http://www.dell.com/support/troubleshooting/us/en/19/Product/precision-m4600 an update is available for your BIOS (A15). If you update to this, does it change anything?
If not, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Thank you for your understanding. ** Tags added: bios-outdated-a15 needs-upstream-testing regression- potential ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Summary changed: - Cannot mount USB3 external drive while plugged before boot + [Dell Precision M4600] Cannot mount USB3 external drive while plugged before boot -- 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/1085889 Title: [Dell Precision M4600] Cannot mount USB3 external drive while plugged before boot Status in “linux” package in Ubuntu: Incomplete Bug description: This bugs is exactly the same than explained here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/901215 But I am now under Quantal 64bits with this kernel : Ubuntu 3.5.0-19.30-generic 3.5.7 To summarise : If I plug my external drive on the USB3.0 after boot, it is recognized. But it is not the case when plugged before boot. I tried to blacklist uas. And then it works. But is "uas" not usefull for anything else ? So it could be good if the fix could also be released for quantal --- ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: seb 2332 F.... pulseaudio /dev/snd/controlC0: seb 2332 F.... pulseaudio DistroRelease: Ubuntu 12.10 HibernationDevice: RESUME=UUID=e8bd2e1e-d910-4f35-bf7a-3a48ff7d5867 InstallationDate: Installed on 2012-04-22 (224 days ago) InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) MachineType: Dell Inc. Precision M4600 MarkForUpload: True Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=9113809f-9c59-471e-918e-449083e6b6b1 ro quiet splash reboot=pci ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware 1.95 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes Tags: quantal running-unity Uname: Linux 3.5.0-19-generic x86_64 UpgradeStatus: Upgraded to quantal on 2012-10-20 (44 days ago) UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers dmi.bios.date: 10/18/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A08 dmi.board.name: 08V9YG dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA08:bd10/18/2011:svnDellInc.:pnPrecisionM4600:pvr01:rvnDellInc.:rn08V9YG:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Precision M4600 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1085889/+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