[Hyper-V] ubuntu server with hyper-v virtual machine will freeze processes

[Jayson Reis]

I just installed an ubuntu server image with hyper-v and I am using tmux over it's bridge network to compile some rust projects and it seems to randomly hang the cpu, some processes like ps will just freeze before printing the last lines.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-virtual 4.10.0.20.22
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 May 11 10:14 seq
 crw-rw---- 1 root audio 116, 33 May 11 10:14 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Thu May 11 11:31:30 2017
HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1
InstallationDate: Installed on 2017-04-23 (17 days ago)
InstallationMedia: Ubuntu-Server 17.04 "Zesty Zapus" - Release amd64 (20170412)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
PciMultimedia:

ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-20-generic root=/dev/mapper/hostname--vg-root ro
RelatedPackageVersions:
 linux-restricted-modules-4.10.0-20-generic N/A
 linux-backports-modules-4.10.0-20-generic N/A
 linux-firmware 1.164
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/06/2017
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: 9964-9328-3358-4828-9545-9767-50
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: 7.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr090006:bd01/06/2017: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

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joshua R. Poulson (jrp)]

Is this over vmconnect, RDP, or in an ssh session?

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.11 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'.

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/v4.11