HN> So whats the difference between standby and suspend?
Suspend mode writes the system state to disc and switches (nearly)
everything off. Standby mode powers down everything to minimal power
consumption and keeps RAM contents where they are. Suspend will last
indefinitely, standby is limited to a few hours.
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Well, the following three-liners (+ comments) seems to do it. It checks
if clock was advanced after return from APM Idle - if not we assume BIOS
did not halt CPU and do it ourselves. The addidional condition &&
!current->need_resched is for the case when BIOS did halt CPU and
non-clock interrupt happened that waked up somebody else. But may be I
am just plain paranoid. The code has no impact for "BIOS slows CPU"
It works here for broken BIOS. I appreciate if people with good BIOS
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10. APM vs ACPI?