[Bug 665891] [NEW] Kernel freeze on S3 resume due to Intel Idle Driver on Intel Core i7

[mikeos]

Public bug reported:

System freezes on resume (sometimes on 2nd, 3rd... suspend/resume cycle). It seems to be a race condition related to Intel Idle Driver.  Using the boot GRUB parameter "intel_idle.max_cstate=0" which disables the new Intel Idle Driver and assures fallback to ACPI idle, the problem disappears.  Another, less clean, workaround was to completely disable Intel SpeedStep in BIOS.
Same problem confirmed on both Ubuntu 2.6.35 and 2.6.36 series kernels as well as corresponding mainline kernels. Brief testing on 2.6.32, 2.6.33 and 2.6.34 kernels led to same resume freezes; on Lucid 2.6.32 kernel it *seemed* that disabling "/usr/lib/pm-utils/sleep.d/94cpufreq" script has helped to avoid the race condition on resume.
Note:  the race condition only appears when resuming the laptop (Dell e6410)  on battery power.
Thanks to Mario Limonciello from Dell Linux engineering for hinting that Intel Idle Driver might be the element playing the determining role in this S3 resume race condition.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.35-22-generic 2.6.35-22.35
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.36-1.7-generic 2.6.36
Uname: Linux 2.6.36-1-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  user      5836 F.... kmix
 /dev/snd/controlC0:  user      5683 F.... knotify4
                      user      5836 F.... kmix
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xe9660000 irq 44'
   Mixer name	: 'IDT 92HD81B1C5'
   Components	: 'HDA:111d76d5,1028040a,00100104'
   Controls      : 15
   Simple ctrls  : 10
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xe3080000 irq 17'
   Mixer name	: 'Nvidia GPU 0b HDMI/DP'
   Components	: 'HDA:10de000b,10de0101,00100200'
   Controls      : 16
   Simple ctrls  : 4
Date: Sun Oct 24 15:18:38 2010
EcryptfsInUse: Yes
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100706)
MachineType: Dell Inc. Latitude E6410
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.36-1-generic root=UUID=a19d680a-64b5-4ad8-92a5-25ca7051f5a8 ro vdso32=0 acpi_sleep=nonvs intel_idle.max_cstate=0 quiet splash vga=792 elevator=noop
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.39
SourcePackage: linux
dmi.bios.date: 08/10/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0K42JR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd08/10/2010:svnDellInc.:pnLatitudeE6410:pvr0001:rvnDellInc.:rn0K42JR:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6410
dmi.product.version: 0001
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug kernel-power natty needs-upstream-testing regression-potential resume suspend

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Kernel freeze on S3 resume due to Intel Idle Driver on Intel Core i7
https://bugs.launchpad.net/bugs/665891
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