[Bug 202140] HP Z600 defaults to LAPIC for kern.eventtimer.timer but can't use 'Online CPU idle state' higher than C1 with this setting

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Feb 23 21:04:00 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202140

--- Comment #1 from Jochen Breuer <brejoc at gmail.com> ---
I'm now having exactly the same problem with an older Samsung NC10 - a so
called netbook.

'kern.eventtimer.timer' defaults to 'HPET'. But in this case the solution seems
to be 'LAPIC'.



--- Event timer choices ---

$ sysctl kern.eventtimer.choice
kern.eventtimer.choice: HPET(450) HPET1(440) HPET2(440) LAPIC(400) i8254(100)
RTC(0)


--- Intel Atom CPU N270 ---

$ sysctl hw.|head
hw.machine: i386
hw.model: Intel(R) Atom(TM) CPU N270   @ 1.60GHz
hw.ncpu: 2
hw.byteorder: 1234
hw.physmem: 1042579456
hw.usermem: 920571904
hw.pagesize: 4096
hw.floatingpoint: 1
hw.machine_arch: i386
hw.realmem: 1073741824

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