Comment 12 for bug 1577024

Tested successfully. Tags updated as requested.

Thank you.

============================================================
Matthew Giassa, MASc, BASc, EIT
Security and Embedded Systems Specialist
linkedin: https://ca.linkedin.com/in/giassa
e-mail: <email address hidden>
website: www.giassa.net

> -------- Original Message --------
> Subject: [Bug 1577024] Re: Kernel 4.2.X and 4.4.X - Fix USB3.0 link
> power management (LPM) claim/release logic in USBFS
> From: Kamal Mostafa <email address hidden>
> Date: Tue, June 14, 2016 7:21 am
> To: <email address hidden>
>
>
> This bug is awaiting verification that the kernel in -proposed solves
> the problem. Please test the kernel and update this bug with the
> results. If the problem is solved, change the tag 'verification-needed-
> xenial' to 'verification-done-xenial'.
>
> If verification is not done by 5 working days from today, this fix will
> be dropped from the source code, and this bug will be closed.
>
> See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
> to enable and use -proposed. Thank you!
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1577024
>
> Title:
> Kernel 4.2.X and 4.4.X - Fix USB3.0 link power management (LPM)
> claim/release logic in USBFS
>
> Status in linux package in Ubuntu:
> Triaged
> Status in linux source package in Vivid:
> Fix Committed
> Status in linux source package in Wily:
> Fix Committed
> Status in linux source package in Xenial:
> Fix Committed
>
> Bug description:
> I am currently carrying out kernel testing and debugging with Alan Stern on the mainline kernel. Alan has proposed a patch to resolve a bug in USBFS that causes USB machine vision cameras to fail on kernels that contain the following patch:
> commit e951f84074b84a3f5aecbffd01da74576e0068d5
> Author: Lu Baolu <email address hidden>
> Date: Tue Jun 16 09:08:26 2015 +0800
> usb: core: lpm: set lpm_capable for root hub device
> commit 2d2a316765d956bc5cb6bb367b2ec52ca59ab8e9 upstream.
>
> There is an issue in this patch that impacts software that rapidly
> issues claim/release calls in USBFS, and all of our customers that use
> Ubuntu 14.04.4 (kernel 4.2.x) and Ubuntu 16.04 (kernel 4.4.x) are
> unable to communicate with their machine vision cameras using our
> software stack.
>
> The patch for the mainline kernel is being tested, and is currently posted, along with a history of this issue, at:
> https://bugzilla.kernel.org/show_bug.cgi?id=115961
>
> Right now, all of our customers have to either use an older kernel, or
> manually patch their own kernel with the fix provided by Alan if they
> are required to use a newer kernel. I am raising this bug so that,
> once the patch is submitted to the the mainline/linus series, it can
> be included in the next "monthly" kernel update made available to the
> general public, and so our customers can just run a normal "vanilla"
> system without having to rely on manually patching their kernel every
> time they need to update.
>
> I can be contacted at:
> <email address hidden>
> <email address hidden>
>
> Thank you.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: linux-image-3.13.0-55-generic 3.13.0-55.94
> ProcVersionSignature: Ubuntu 3.13.0-55.94-generic 3.13.11-ckt20
> Uname: Linux 3.13.0-55-generic i686
> NonfreeKernelModules: nvidia
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: i386
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: owner 4035 F.... pulseaudio
> CurrentDesktop: Unity
> Date: Sat Apr 30 10:36:15 2016
> EcryptfsInUse: Yes
> HibernationDevice: RESUME=UUID=0287e25d-68d6-4390-aced-c682b8e13b60
> InstallationDate: Installed on 2013-09-23 (949 days ago)
> InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release i386 (20130820.1)
> IwConfig:
> lo no wireless extensions.
>
> cscotun0 no wireless extensions.
>
> eth0 no wireless extensions.
> MachineType: Hewlett-Packard HP xw4600 Workstation
> ProcFB:
>
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-55-generic root=UUID=292845c9-c333-4592-aa06-bc01f45d3ee6 ro quiet splash
> RelatedPackageVersions:
> linux-restricted-modules-3.13.0-55-generic N/A
> linux-backports-modules-3.13.0-55-generic N/A
> linux-firmware 1.127.19
> RfKill:
>
> SourcePackage: linux
> UpgradeStatus: Upgraded to trusty on 2014-07-30 (639 days ago)
> dmi.bios.date: 07/09/2012
> dmi.bios.vendor: Hewlett-Packard
> dmi.bios.version: 786F3 v01.34
> dmi.board.asset.tag: CAC94101JZ
> dmi.board.name: 0AA0h
> dmi.board.vendor: Hewlett-Packard
> dmi.chassis.asset.tag: CAC94101JZ
> dmi.chassis.type: 6
> dmi.chassis.vendor: Hewlett-Packard
> dmi.modalias: dmi:bvnHewlett-Packard:bvr786F3v01.34:bd07/09/2012:svnHewlett-Packard:pnHPxw4600Workstation:pvr:rvnHewlett-Packard:rn0AA0h:rvr:cvnHewlett-Packard:ct6:cvr:
> dmi.product.name: HP xw4600 Workstation
> dmi.sys.vendor: Hewlett-Packard
>
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