I experience system freezes on Ubuntu 12.04 when working with eclipse (when switching between open files using tabs). This is reproducible on my system. I have not yet observed this behaviour at other tasks / programs; system runs fine except for that (including video games and watching videos).
The last thing I notice in kernel log (when freeze) is this:
kernel: [ 2560.052581] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 00070000, was 16000000
Note: I have also observed that message when the system did not freeze thereafter, and have seen freezes not directly following that message, so this might be unrelated.
Computer is a brand new Lenovo B590 with Intel video (module i915 is used). Since I have it only a few weeks, I cannot tell if this error already occurred in previous Ubuntu releases or not.
A memory check (memtest86) did not show any errors.
I have all (and only) official Ubuntu updates installed, currently 3.2.0-54-generic #82-Ubuntu SMP Tue Sep 10 20:08:42 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux.
I suspect that the Eclipse IDE requests some special stuff from video driver which then crashes. Obviously it should not be possible for userspace to crash the kernel, so this should also be considered a security problem.
More details to come, I'd be glad to provide more data.
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AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: manu 1836 F.... xfce4-volumed
manu 1851 F.... pulseaudio
/dev/snd/controlC29: manu 1836 F.... xfce4-volumed
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf0610000 irq 45'
Mixer name : 'Intel PantherPoint HDMI'
Components : 'HDA:10ec0269,17aa5011,00100202 HDA:80862806,80860101,00100000'
Controls : 26
Simple ctrls : 12
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
Mixer name : 'ThinkPad EC (unknown)'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=03cfd31a-549e-419b-9741-7870bbe9f449
InstallationMedia: Xubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820)
MachineType: LENOVO 37613FG
MarkForUpload: True
NonfreeKernelModules: wl
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-54-generic root=UUID=ca45191f-79c6-47ed-8ccf-be4ae9f14423 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-54.82-generic 3.2.50
RelatedPackageVersions:
linux-restricted-modules-3.2.0-54-generic N/A
linux-backports-modules-3.2.0-54-generic N/A
linux-firmware 1.79.6
StagingDrivers: mei
Tags: precise staging precise staging
Uname: Linux 3.2.0-54-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo tomcat7
dmi.bios.date: 04/09/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: H9ET73WW(1.10)
dmi.board.asset.tag: Not Available
dmi.board.name: 37613FG
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD MM DPK IPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrH9ET73WW(1.10):bd04/09/2013:svnLENOVO:pn37613FG:pvrLenovoB590:rvnLENOVO:rn37613FG:rvrWin8STDMMDPKIPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 37613FG
dmi.product.version: Lenovo B590
dmi.sys.vendor: LENOVO
On IRC you commented that you believed that this issue was not present in 3.2.0-40 kernels. Could you go back to those older kernels and see if you can identify an older kernel which does not have the issue and the first one after it which does. From there we can do a bisect to identify the commit.
I would probabally also be helpful (as this is a new machine) to see if the latest 3.5 or 3.8 kernel has the issue as well. Both of these are available on Precise as HWE (lts) kernels.