Public bug reported:
I've updated from Xenial to Yakkety on my Desktop - Sandybridge Macbook
Pro 8,1
With Xenial, on 4.4 kernel, doing a compile (with ninja for example), I
could use all CPU cores and still have a usable desktop: app switching
was relatively quick, I could (slowly) surf the web while the compile
was happening.
Now with Yakkety 4.8 kernel, doing a compile using all cores totally
seizes up my desktop - app switching is incredibly slow, I see redraw
errors, mouse has poor response.
As a workaround, I have to manually leave a CPU core free when
compiling.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.8.0-26-generic 4.8.0-26.28
ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
Uname: Linux 4.8.0-26-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D0p: gerry 4929 F...m pulseaudio
/dev/snd/controlC0: gerry 4929 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Nov 1 12:02:02 2016
HibernationDevice: RESUME=UUID=2cba34fc-e62e-44c2-904a-1f3f96fbc5eb
InstallationDate: Installed on 2016-05-05 (179 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: Apple Inc. MacBookPro8,1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-26-generic.efi.signed
root=UUID=a9e3a76e-0502-4f4e-a8d9-132fb83f44b1 ro noprompt quiet splash
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.8.0-26-generic N/A
linux-backports-modules-4.8.0-26-generic N/A
linux-firmware 1.161
SourcePackage: linux
UpgradeStatus: Upgraded to zesty on 2016-10-27 (4 days ago)
dmi.bios.date: 10/26/15
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP81.88Z.0047.B2C.1510261540
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-94245B3640C91C81
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro8,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-94245B3640C91C81
dmi.modalias:
dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B2C.1510261540:bd10/26/15:svnAppleInc.:pnMacBookPro8,1:pvr1.0:rvnAppleInc.:rnMac-94245B3640C91C81:rvrMacBookPro8,1:cvnAppleInc.:ct10:cvrMac-94245B3640C91C81:
dmi.product.name: MacBookPro8,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
klp-taint: 12289
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug zesty
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https://bugs.launchpad.net/bugs/1638278
Title:
4.8 kernel, under heavy load desktop unusable
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