Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.4 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-wily ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1534948 Title: Ubuntu 15.10 fails to boot from Sandisk USB stick Status in linux package in Ubuntu: Incomplete Bug description: Booting from Sandisk USB stick fails and stops on "device descriptor read/64, error -71" and "device not accepting address 6, error -71" on Dell Latitude E5420 Laptop. I tried every USB socket but without success. Booting with "rootwait" parameter does not help either. [ 5.190746] ata5: SATA link down (SStatus 0 SControl 300) [ 5.510923] ata6: SATA link down (SStatus 0 SControl 300) [ 18.414128] usb 2-1.4: device descriptor read/64, error -110 [ 23.601028] usb 2-1.4: device descriptor read/64, error -71 [ 23.777126] usb 2-1.4: new high-speed USB device number 4 using ehci-pci [ 23.861176] usb 2-1.4: device descriptor read/64, error -71 [ 24.049280] usb 2-1.4: device descriptor read/64, error -71 [ 24.225377] usb 2-1.4: new high-speed USB device number 5 using ehci-pci [ 24.641614] usb 2-1.4: device not accepting address 5, error -71 [ 24.713649] usb 2-1.4: new high-speed USB device number 6 using ehci-pci [ 25.129882] usb 2-1.4: device not accepting address 6, error -71 [ 25.131599] usb 2-1-port4: unable to enumerate USB device [ 25.205925] usb 2-1.6: new full-speed USB device number 7 using ehci-pci [ 25.303424] usb 2-1.6: New USB device found, idVendor=413c, idProduct=8187 [ 25.304928] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 25.306409] usb 2-1.6: Product: DW375 Bluetooth Module [ 25.307864] usb 2-1.6: Manufacturer: Dell Computer Corp [ 25.309305] usb 2-1.6: SerialNumber: 90004EDB8100 however unpluging and repluging usb stick makes booting process go further [ 35.799849] usb 2-1.4: new high-speed USB device number 8 using ehci-pci [ 35.893824] usb 2-1.4: New USB device found, idVendor=0781, idProduct=5583 [ 35.895294] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 35.896728] usb 2-1.4: Product: Ultra Fit [ 35.898129] usb 2-1.4: Manufacturer: SanDisk [ 35.899521] usb 2-1.4: SerialNumber: 4C530001160413113001 [ 35.905302] usb-storage 2-1.4:1.0: USB Mass Storage device detected [ 35.907051] scsi host6: usb-storage 2-1.4:1.0 [ 35.908544] usbcore: registered new interface driver usb-storage [ 35.911586] usbcore: registered new interface driver uas [ 36.909422] scsi 6:0:0:0: Direct-Access SanDisk Ultra Fit 1.00 PQ: 0 ANSI: 6 [ 36.911179] sd 6:0:0:0: Attached scsi generic sg2 type 0 [ 36.913169] sd 6:0:0:0: [sdb] 60751872 512-byte logical blocks: (31.1 GB/28.9 GiB) [ 36.915880] sd 6:0:0:0: [sdb] Write Protect is off [ 36.917297] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00 [ 36.918317] sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 36.950274] sdb: sdb1 sdb2 < sdb5 > [ 36.955479] sd 6:0:0:0: [sdb] Attached SCSI removable disk [ 37.254029] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null) My system: darek@LAPTOP-PORTABLE:~$ lsb_release -rd Description: Ubuntu 15.10 Release: 15.10 darek@LAPTOP-PORTABLE:~$ uname -a Linux LAPTOP-PORTABLE 4.2.0-23-generic #28-Ubuntu SMP Sun Dec 27 17:47:31 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1534948/+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
