Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.19 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'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-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/v3.19-rc2-vivid/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged -- 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/1406867 Title: Hyper-V TRIM Feature Broken in current LTS trusty kernel Status in linux package in Ubuntu: Triaged Bug description: The TRIM/UNMAP feature is broken in the current trusty kernel with Hyper-V because of the reversion of this commit: http://kernel.ubuntu.com/git?p=ubuntu/ubuntu- trusty.git;a=commit;h=81a73bce0c7b86fbf51004cb171387e73e082784 However a proposed storvsc patch has been submitted to the upstream kernel mailing list which could be found here: https://patchwork.kernel.org/patch/5503381/ In Hyper-V TRIM/UNMAP allows the user to reclaim allocated storage that is no longer in use inside a thin provisioned VHDX volume. --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jan 1 03:42 seq crw-rw---- 1 root audio 116, 33 Jan 1 03:42 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory CurrentDmesg: [ 10.846694] init: plymouth-upstart-bridge main process ended, respawning DistroRelease: Ubuntu 14.04 IwConfig: Error: [Errno 2] No such file or directory Lspci: Error: [Errno 2] No such file or directory Lsusb: Error: [Errno 2] No such file or directory MachineType: Microsoft Corporation Virtual Machine Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-43-generic root=/dev/mapper/trusty--201412122541-root ro quiet elevator=noop video=hyperv_fb:800x600 splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11 RelatedPackageVersions: linux-restricted-modules-3.13.0-43-generic N/A linux-backports-modules-3.13.0-43-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory Tags: trusty Uname: Linux 3.13.0-43-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 05/23/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 090006 dmi.board.name: Virtual Machine dmi.board.vendor: Microsoft Corporation dmi.board.version: 7.0 dmi.chassis.asset.tag: 3060-1254-0945-5202-9816-4673-85 dmi.chassis.type: 3 dmi.chassis.vendor: Microsoft Corporation dmi.chassis.version: 7.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr090006:bd05/23/2012:svnMicrosoftCorporation:pnVirtualMachine:pvr7.0:rvnMicrosoftCorporation:rnVirtualMachine:rvr7.0:cvnMicrosoftCorporation:ct3:cvr7.0: dmi.product.name: Virtual Machine dmi.product.version: 7.0 dmi.sys.vendor: Microsoft Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1406867/+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
