Tu on computer with USB keyboard through PS/2 adapter

I want to wake-up my PC by USB keyboard connected through PS/2 adapter. According to BIOS settings:

Resume From S3/S4/S5 by PS/2 keyboard ... [Any Key]

it should be working, but doesn't.

If I connect USB mouse as I did for keyboard & set up in BIOS:

Resume From S3/S4/S5 by PS/2 Mouse ... [Enabled]

it works - PC wakes-up when I pressed a mouse button.

Is it possible to wake up my PC with my keyboard?

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