Description of problem: As in "Summary". Where I tried (Tyan) effects are the same for UP and SMP kernels. A message "Power off" shows up and a box is still powered up. Playing with APM option does not have, not surprisingly, any effect I realize that one needs working ACPI and the following shows up during a boot: acpi: RSDP found at address 00000100000f4680 acpi: RSDP rev: 0 oem: ACPIAM acpi: Init failed. OTOH this is doable as after a substitution a kernel from SuSE the same box does power down after 'halt -p' without any other changes in a system. An ACPI version is clearly different.
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