Public bug reported:
Actual behavior:
$ sudo latencytop
mount: none is already mounted or /sys/kernel/debug busy
Please enable the CONFIG_LATENCYTOP configuration in your kernel.
Exiting...
$ grep -i latencytop /boot/config-`uname -r`
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
# CONFIG_LATENCYTOP is not set
Expected behavior:
# working latencytop and
$ grep -i latencytop /boot/config-`uname -r`
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_LATENCYTOP=y
Tested with package linux-image-4.4.0-57-lowlatency.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-lowlatency 4.4.0.59.62
ProcVersionSignature: Ubuntu 4.4.0-57.78-lowlatency 4.4.35
Uname: Linux 4.4.0-57-lowlatency x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mira 2801 F.... pulseaudio
CurrentDesktop: MATE
Date: Thu Jan 12 16:33:59 2017
EcryptfsInUse: Yes
HibernationDevice:
#RESUME=UUID=609d4e01-862b-4199-bd45-ad8841f8c8c3
#RESUME=UUID=69fefec2-0a4f-489b-bb6e-62eab3d97735
InstallationDate: Installed on 2009-10-08 (2652 days ago)
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Alpha amd64 (20091008)
IwConfig:
lo no wireless extensions.
eth1 no wireless extensions.
MachineType: System manufacturer System Product Name
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-57-lowlatency
root=UUID=23b87e6c-20b4-4242-9489-1599d62abcce ro vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-57-lowlatency N/A
linux-backports-modules-4.4.0-57-lowlatency N/A
linux-firmware 1.157.6
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-11-14 (59 days ago)
dmi.bios.date: 08/20/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1401
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8H77-M PRO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1401:bd08/20/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-MPRO:rvrRevX.0x: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: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1655986
Title:
lowlatency kernel is lacking support for latencytop
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