Public bug reported:
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-collected wily
** Tags added: apport-collected wily
** Description changed:
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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https://bugs.launchpad.net/bugs/1523765
Title:
USB performance extremely unstable
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