[haiku-bugs] Re: [Haiku] #11630: Can only boot x86 64 with local apic disabled

  • From: "mmlr" <trac@xxxxxxxxxxxx>
  • Date: Tue, 13 Oct 2015 19:29:37 -0000

#11630: Can only boot x86 64 with local apic disabled
Reporter: HAL | Owner: mmlr
Type: bug | Status: assigned
Priority: normal | Milestone: Unscheduled
Component: | Version: R1/Development
System/Kernel | Keywords: boot freeze rocket icon local apic
Resolution: | disable
Blocked By: | Blocking:
Has a Patch: 0 | Platform: x86-64

Comment (by mmlr):

Not sure what I can contribute here. The syslog looks rather uneventful to

Generally disabling local APIC is like making your machine into a < y2k
single processor machine. It disables the mechanism that SMP, the IO-APIC
and APIC timers are based on, hence they are all implicitly disabled. So
while it is interesting that disabling it doesn't trigger it, it doesn't
narrow down the cause all that much. You could try disabling the higher
level features (SMP and IO-APIC) one by one and see if that already makes
it work.

Ticket URL: <https://dev.haiku-os.org/ticket/11630#comment:9>
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