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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D271826

ben@desync.com changed:

           What    |Removed                     |Added
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                 CC|                            |ben@desync.com

--- Comment #28 from ben@desync.com ---
Created attachment 251098
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D251098&action=
=3Dedit
timebase sync hack

I'm not sure my symptoms exactly match what's described here, but it seems =
like
timebase sync may be broken on G5.  ofwcons freezes for about a minute ever=
y so
often, the fans go full blast at the same time because powermac_thermal is
hung.  The system is usually (always?) responsive over ssh while this is
happening.

Anyway, the attached hack seems to help in my case, as least.  Only tested =
on
the later PCIe dual and quad G5s.  I'm not sure timebase sync is even suppo=
rted
on PCI-X powermacs (definitely not on my Xserve G5 with weird sync via I2C).

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