I had this issue with an GA-970A-D3P motherboard, chipset is AMD 970/AMD SB 950.
I set IOMMU controller = Enable on BIOS, now I can boot from my USB stick with no 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/859137 Title: Motherboard AMD 990FX/SB950 usb don't work Status in “linux” package in Ubuntu: Fix Released Bug description: USB don't work on a ASUS Crosshair V Formula motherboard. If I connect any device to USB 2 printer or flash drive are not recognized. Also USB mouse and keyboard are not recognized on USB 2 connectors. Fortunately if I connect mouse and keyboard to USB 3 connectors they works constantly. If I connect printer or flash drive or external drive box to usb 3 connection fail after some seconds. If I use the USB hub of my Logitech G11 keyboard also the keyboard stop working. I test Ubuntu Oneiric beta1 and all updates since now but the problem it's always present. Also Natty, Maverick and Lucid are effected with this USB malfunction. I test also other distributions such as Fedora 15 and Sabayon 6 and the USB malfunction it's present. I test puppy live cd and USB 2 works but not USB 3. If I use dmesg | tail I have: [ 3603.750117] usb 7-1: device descriptor read/64, error -32 [ 3604.010107] usb 7-1: device descriptor read/64, error -32 [ 3604.270108] usb 7-1: new full speed USB device number 3 using ohci_hcd [ 3604.420123] usb 7-1: device descriptor read/64, error -32 [ 3604.680121] usb 7-1: device descriptor read/64, error -32 [ 3604.940129] usb 7-1: new full speed USB device number 4 using ohci_hcd [ 3605.360112] usb 7-1: device not accepting address 4, error -32 [ 3605.530122] usb 7-1: new full speed USB device number 5 using ohci_hcd [ 3605.950115] usb 7-1: device not accepting address 5, error -32 [ 3605.950169] hub 7-0:1.0: unable to enumerate USB device on port 1 I think this problem it's specific for AMD 990FX/SB950 chipset. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: linux-image-3.0.0-11-generic 3.0.0-11.18 ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4 Uname: Linux 3.0.0-11-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: paolo 2111 F.... pulseaudio /dev/snd/controlC0: paolo 2111 F.... pulseaudio CRDA: Error: [Errno 2] File o directory non esistente Card0.Amixer.info: Card hw:0 'SB'/'HDA ATI SB at 0xfe600000 irq 16' Mixer name : 'Realtek ALC889' Components : 'HDA:10ec0889,1043846b,00100004' Controls : 39 Simple ctrls : 23 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xfe080000 irq 25' Mixer name : 'Nvidia GPU 16 HDMI/DP' Components : 'HDA:10de0016,10de0101,00100100' Controls : 16 Simple ctrls : 4 Date: Sun Sep 25 21:30:30 2011 HibernationDevice: RESUME=UUID=7480693f-559a-4a0e-a15d-efdf2771f0fb IwConfig: lo no wireless extensions. eth0 no wireless extensions. MachineType: To be filled by O.E.M. To be filled by O.E.M. ProcEnviron: PATH=(custom, no user) LANG=it_IT.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-11-generic root=UUID=ed1fcb52-a56c-4538-b397-4d2b391b6f14 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.0.0-11-generic N/A linux-backports-modules-3.0.0-11-generic N/A linux-firmware 1.60 RfKill: SourcePackage: linux StagingDrivers: zram UpgradeStatus: Upgraded to oneiric on 2011-09-23 (2 days ago) dmi.bios.date: 06/22/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0506 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Crosshair V Formula dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0506:bd06/22/2011:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKComputerINC.:rnCrosshairVFormula:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: To be filled by O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/859137/+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