kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

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

-- 
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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

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