Description of problem:
After suspend to mem/disk,system resume automatically without press the power button.And I got some error in terminal and dmesg.
[root@localhost ~]# echo mem > /sys/power/state 
-bash: echo: write error: Resource temporarily unavailable

Version-Release number of selected component (if applicable):
kernel-2.6.18-182.el5

How reproducible:
Always

Steps to Reproduce:
1.# cat /sys/power/state 
standby mem disk
2.#echo mem > /sys/power/state or #echo disk > /sys/power/state
  
Actual results
The screen displays "stopping tasks...".After about 2 minutes,system resumes automatically without press the power button.

Expected results:
System can suspend and resume successfully.

Additional info:
some dmesg after resume:(full dmesg will be attached.)

CPU1 is down
kvm: disabling virtualization on CPU2
CPU 2 is now offline
CPU2 is down
Breaking affinity for irq 50
Breaking affinity for irq 82
Breaking affinity for irq 169
Breaking affinity for irq 233
kvm: disabling virtualization on CPU3
CPU 3 is now offline
SMP alternatives: switching to UP code
CPU3 is down
Stopping tasks: ===================================================================================================
stopping tasks timed out after 120 seconds (1 tasks remaining):
khungtaskd
Restarting tasks...<6> Strange, khungtaskd not stopped
done
Enabling non-boot CPUs ...
SMP alternatives: switching to SMP code


host info:(4 cpus,here only lists one)

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Quad CPU    Q9550  @ 2.83GHz
stepping	: 10
cpu MHz		: 2826.238
cache size	: 6144 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 3
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm
bogomips	: 5652.48
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management: