WARNING: at /build/buildd/linux-2.6.31/kernel/power/suspend_test.c:52 suspend_test_finish 0x80/0x90()

[vengudi swaminathan sridharan]

When the machine switches from mains power supply to the battery power, it goes to suspend mode and wnen it awakes there is the warning that it is a kernel problem and the computer might be unstable and needs to be re started.

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: sridhar 1495 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with CS4299 at irq 10'
   Mixer name : 'Cirrus Logic CS4299 rev 4'
   Components : 'AC97a:43525934'
   Controls : 36
   Simple ctrls : 22
Date: Fri May 14 10:14:29 2010
DistroRelease: Ubuntu 9.10
Failure: oops
HibernationDevice: RESUME=UUID=61870a4a-7419-49cc-9cfa-a342082f9e16
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
Lsusb:
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer TravelMate 250
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=UUID=cb813f9d-f5ba-4508-83cf-d047617f988f ro quiet splash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-14-generic N/A
 linux-firmware 1.24
RfKill:

SourcePackage: linux
Tags: kernel-oops
Title: WARNING: at /build/buildd/linux-2.6.31/kernel/power/suspend_test.c:52 suspend_test_finish+0x80/0x90()
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 01/29/04
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.15
dmi.board.name: TravelMate 240
dmi.board.vendor: Acer
dmi.board.version: Rev.A
dmi.chassis.type: 1
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.15:bd01/29/04:svnAcer:pnTravelMate250:pvr-1:rvnAcer:rnTravelMate240:rvrRev.A:cvnAcer:ct1:cvrN/A:
dmi.product.name: TravelMate 250
dmi.product.version: -1
dmi.sys.vendor: Acer

[^_Pepe_^ (jose-angel-fernandez-freire)]

Hi,

The warning reported here typically indicates that it took longer for your system to resume from suspend than expected. I believe there is a 5 sec barrier which your system likely exceeded. Typically you'll see something similar to "PM: resume devices took 7.140 seconds" in your dmesg output when this happens. A patch to prevent this warning has been applied via bug 464552. As a result I'm marking this as a duplicate to bug 464552. Please continue to track this issue at that report. Thanks!