Mac OS X on x86 Hardware 2008–2024 Technical Archive
InfiniteMac OSx86 › Leopard 10.5 › PC is about to take off, fans are all at HIGH speed
3,856 reads · 2009-02-19 – 2009-02-21
Note Leopard 10.5 Voodoo / XNU Kernel

PC is about to take off, fans are all at HIGH speed

Managed yesterday to upgrade kernel to voodoo 9.5 (MacOSX 10.5.4 -see sig for rest of detail) and all is well, system boots up quickly (and shuts down quickly also). Sleep does not work yet and hibernate not tried at all. One thing though:…

Primary Author
@thagg1975 Published 2009-02-19
Collection
Leopard 10.5
Archival Footprint
3,856 historical reads · 3 curated field notes (from 7 dispatches) · 2009-02-19 – 2009-02-21
Credited Voices (3)
@thagg1975 (4)@Taisto (2)@willian

Managed yesterday to upgrade kernel to voodoo 9.5 (MacOSX 10.5.4 -see sig for rest of detail) and all is well, system boots up quickly (and shuts down quickly also). Sleep does not work yet and hibernate not tried at all.

One thing though: The CPU/Chipset/Case fans are all managed by an ITE chipset, which has a "nice" utility in m$window that allows you to specify temperatures for "off", "on" and "fullspeed". For my environment these have been tuned and usually are totally off or working on low speed.

However, when booting MacOSX (10.5.5), after lets say 2-3 minutes, all start and go on high speed which makes it very annoying. The chipset fan (worst case) goes to 7000 rpms!

Is there something to do about this? the mobo is DFI LanParty Ultra-D (nforce4)

Author Updates & Technical Revisions

Follow-up dispatches by @thagg1975

Author Update #1 @thagg1975 2009-02-19 ↳ Re: @Taisto
@TaistoHave you tried to delete IntelCPUPowerManagement.kext and AppleCPUThermal.kext ? If not, do so - i have no idea how your FANs are controlled but it helps on many laptops to slow down the fan so it may help here aswell i guess...

by deleting you mean physically deleting ( e.g. rm -fr AppleCPUThermal.kext on correct folder ) and then rebooting with -f option ?

Thanks to confirm :-d

Author Update #2 @thagg1975 2009-02-19

There was only AppleThermo.kext which I've removed. Still waiting.

Synthesized Community Field Notes

3 technical responses curated from 7 original dispatches

Field Note #1 @Taisto 2009-02-19

Have you tried to delete IntelCPUPowerManagement.kext and AppleCPUThermal.kext ? If not, do so - i have no idea how your FANs are controlled but it helps on many laptops to slow down the fan so it may help here aswell i guess...

Field Note #2 @Taisto 2009-02-19

Yepp, just remove those two kexts, reboot, and boot with -f .

Field Note #3 @willian 2009-02-21

Maybe check your Fans Bios Setting first, then checking whether fans still work in hi speed in windows system...

Sources & Contributor Provenance (3 credited usernames · Thread #2163)
UsernameDossier ContributionDispatchesActive Window
@thagg1975Primary Author42009-02-19 → 2009-02-20
@TaistoContributor22009-02-19
@willianContributor12009-02-21