Michael Heuberger, thank you for reporting this and helping make Ubuntu better.
Could you please test the latest upstream kernel available from the very top line at the top of the page from http://kernel.ubuntu.com/~kernel- ppa/mainline/?C=N;O=D (the release names are irrelevant for testing, and please do not test the daily folder)? Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow additional upstream developers to examine the issue. If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description: kernel-fixed-upstream kernel-fixed-upstream-X.Y-rcZ Where X, and Y are the first two numbers of the kernel version, and Z is the release candidate number if it exists. If the mainline kernel does not fix the issue, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-X.Y-rcZ Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream. Once testing of the latest upstream kernel is complete, please mark this report's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Tags added: latest-bios-0803 ** Tags added: regression-release ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1523765 Title: USB performance extremely unstable Status in linux package in Ubuntu: Incomplete Bug description: Since I upgraded from Trusty to Wily, the USB performance has become extremely unstable. Sometimes file transfers were fast, like 1GB in 30 sec, then most days it is so slow like 1 GB in 20 minutes for no reason. Here some relevant log lines from the `dmesg` command when I USB is plugged in: ``` [ 496.912939] usb 4-5: new high-speed USB device number 2 using ehci-pci [ 497.111419] usb 4-5: New USB device found, idVendor=1b1c, idProduct=1ab1 [ 497.111425] usb 4-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 497.111428] usb 4-5: Product: Voyager [ 497.111430] usb 4-5: Manufacturer: Corsair [ 497.111433] usb 4-5: SerialNumber: AA40000000000825 [ 497.134497] usb-storage 4-5:1.0: USB Mass Storage device detected [ 497.134600] scsi host12: usb-storage 4-5:1.0 [ 497.134713] usbcore: registered new interface driver usb-storage [ 497.137090] usbcore: registered new interface driver uas [ 498.420795] scsi 12:0:0:0: Direct-Access Corsair Voyager 1100 PQ: 0 ANSI: 0 CCS [ 498.421211] sd 12:0:0:0: Attached scsi generic sg5 type 0 [ 498.913643] sd 12:0:0:0: [sdd] 15663104 512-byte logical blocks: (8.01 GB/7.46 GiB) [ 498.914804] sd 12:0:0:0: [sdd] Write Protect is off [ 498.914809] sd 12:0:0:0: [sdd] Mode Sense: 43 00 00 00 [ 498.915930] sd 12:0:0:0: [sdd] No Caching mode page found [ 498.915934] sd 12:0:0:0: [sdd] Assuming drive cache: write through [ 498.920710] sdd: sdd1 [ 498.924684] sd 12:0:0:0: [sdd] Attached SCSI removable disk [ 1184.038007] usb 4-5: USB disconnect, device number 2 ``` these two lines appear in *red* ``` [ 498.915930] sd 12:0:0:0: [sdd] No Caching mode page found [ 498.915934] sd 12:0:0:0: [sdd] Assuming drive cache: write through ``` What can we do here? How can this be investigated and fixed properly? --- ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: michael-heuberger 4363 F.... pulseaudio /dev/snd/controlC2: michael-heuberger 4363 F.... pulseaudio /dev/snd/controlC0: michael-heuberger 4363 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.10 HibernationDevice: RESUME=UUID=b0b47183-895a-4f27-bb25-40bd23028028 InstallationDate: Installed on 2014-10-31 (403 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: System manufacturer System Product Name NonfreeKernelModules: nvidia Package: linux (not installed) ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-generic root=UUID=b5b38333-3694-4441-8a13-50bf4dbf2f41 ro quiet ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6 RelatedPackageVersions: linux-restricted-modules-4.2.0-19-generic N/A linux-backports-modules-4.2.0-19-generic N/A linux-firmware 1.149.3 RfKill: 0: phy0: Wireless LAN Soft blocked: yes Hard blocked: no Tags: wily Uname: Linux 4.2.0-19-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo wireshark www-data _MarkForUpload: True dmi.bios.date: 08/06/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0803 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P6X58D-E 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.:bvr0803:bd08/06/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6X58D-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1523765/+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
