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Subject2.6.0-test2: unable to suspend (APM)

I'm trying to test out APM on my laptop (in order to test some PCMCIA
changes), but I'm hitting a brick wall. I've added the device_suspend()
calls for the SAVE_STATE, DISABLE and the corresponding device_resume()
calls into apm's suspend() function. (this is needed so that PCI
devices receive their notifications.)

However, APM is refusing to suspend. I'm seeing the following kernel

Suspending devices
hdb: start_power_step(step: 0)
hdb: completing PM request, suspend
hda: start_power_step(step: 0)
hda: start_power_step(step: 1)
hda: complete_power_step(step: 1, stat: 50, err: 0)
hda: completing PM request, suspend
Suspending devices
Suspending devices
apm: suspend: Unable to enter requested state
Devices Resumed
hda: Wakeup request inited, waiting for !BSY...
hda: start_power_step(step: 1000)
blk: queue c03a845c, I/O limit 4095Mb (mask 0xffffffff)
hda: completing PM request, resume
hdb: Wakeup request inited, waiting for !BSY...
hdb: start_power_step(step: 1000)
hdb: completing PM request, resume
Devices Resumed
Devices Resumed

The "apm: suspend: Unable to enter requested state" occurs about 20
seconds afterwards.

(Note that APM worked fine with 2.2 and 2.4 kernels.)

Russell King ( The developer of ARM Linux

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