hwsleep-0178 error with ACPI

I have a smp motherboard ABIT VP6, and I have installed RH7.1 upgrading the kernel 2.4.20 to implement the ACPI.

When I shutdown, the power off works only once in a while, and when it does not work, it gives errors like following and hangs there power down
hwsleep-0178

How can I fix this problem?

Also, after I applied the ACPI patch for kernel 2.4.20, the shutdown process initiated from Gnome menu works all the time, but the power off does not work at all giving no errors. However, before applying the ACPI patch, the shutdown process from Gnome menu did not work at all where as the power off works once in a while as I described above.

How can I fix this shutdown process from Gnome menu?

thank you very much.

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