Messages in this thread | | | Date | Mon, 21 Jul 2003 11:54:14 +0200 | From | Roger Luethi <> | Subject | Re: APIC support prevents power off |
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On Mon, 21 Jul 2003 03:13:52 +0200, Mikael Pettersson wrote: > On Sun, 20 Jul 2003 16:36:13 +0200, Roger Luethi wrote: > >On some UP boards (e.g. ASUS A7A266) enabling support for local APICs keeps > >the machine from powering off on shutdown. It will just hang instead. > > > >This has been observed by others before [1]. A warning in the respective > >configuration note seems in order (or a proper fix if anybody has one). > > Insufficient data to draw anti-local-APIC conclusions. > - ensure you have the latest BIOS
I tend not to touch the BIOS unless I have reason to believe an update will fix an actual problem.
> - if you're using APM, ensure that CPU_IDLE and DISPLAY_BLANK are > disabled, and that APM isn't built as a module > (these things are known to cause APM hangs in UP APIC systems) > - if you're using ACPI, try without ACPI, or at least with ACPI not > doing any power management
Your suggestions match my current configuration:
# # Power management options (ACPI, APM) # CONFIG_PM=y CONFIG_SOFTWARE_SUSPEND=y
# # ACPI Support # # CONFIG_ACPI is not set CONFIG_APM=y # CONFIG_APM_IGNORE_USER_SUSPEND is not set # CONFIG_APM_DO_ENABLE is not set # CONFIG_APM_CPU_IDLE is not set # CONFIG_APM_DISPLAY_BLANK is not set CONFIG_APM_RTC_IS_GMT=y # CONFIG_APM_ALLOW_INTS is not set # CONFIG_APM_REAL_MODE_POWER_OFF is not set
> A very general "may break some BIOSen" warning could be in order.
Mentioning specific symptoms (like breaking power off) wouldn't hurt, either.
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