"[drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS" messages in syslog

[Norbert]

I have two error messages on my Asustek UX32A laptop.
They are:

Jul 12 12:23:23 norbert-flash kernel: [ 21.384213] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 18000000, was 12060000
Jul 12 15:23:43 norbert-flash kernel: [ 41.084122] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 18070000, was 18000000

It seems that 3.2 kernel is not compatible with my CPU/GPU (Intel i7-3537U).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-generic-pae 3.2.0.101.117
ProcVersionSignature: Ubuntu 3.2.0-104.145-generic-pae 3.2.79
Uname: Linux 3.2.0-104-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: norbert 2360 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf7d18000 irq 45'
   Mixer name : 'Intel PantherPoint HDMI'
   Components : 'HDA:10ec0269,10431507,00100100 HDA:80862806,80860101,00100000'
   Controls : 18
   Simple ctrls : 8
Date: Tue Jul 12 15:30:06 2016
HibernationDevice: RESUME=UUID=29a538af-86ee-47e2-9e0f-225270b11d48
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MachineType: ASUSTeK COMPUTER INC. UX32A
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-104-generic-pae root=UUID=cd849a78-bc1b-11e4-a81b-74d435a2779c ro verbose init=/sbin/init -v noplymouth mem=3536M
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-104-generic-pae N/A
 linux-backports-modules-3.2.0-104-generic-pae N/A
 linux-firmware 1.79.18
SourcePackage: linux
StagingDrivers: rts5139 mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/12/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX32A.216
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX32A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX32A.216:bd02/12/2014:svnASUSTeKCOMPUTERINC.:pnUX32A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX32A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX32A
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Brad Figg (brad-figg)]

This change was made by a bot.

[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 v4.7 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/v4.7-rc7

[Norbert (nrbrtx)]

I tested 14.04 LTS, 16.04 LTS, 16.10 (with both kernels - ordinary and mainline) - the bug exists only on 12.04 LTS with 3.2 kernel. So the bug is 'Confirmed' and I added 'kernel-fixed-upstream' tag.

Thank you, Joseph!