Date: Mon, 02 May 2016 19:28:25 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 209202] [PATCH] [powermac_thermal] In-Kernel PowerMac fan control does not effectively regulate some quad core models Message-ID: <bug-209202-8-vvsO4GNSdq@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-209202-8@https.bugs.freebsd.org/bugzilla/> References: <bug-209202-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209202 Mark Millard <markmi@dsl-only.net> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |markmi@dsl-only.net --- Comment #2 from Mark Millard <markmi@dsl-only.net> --- (In reply to gmbroome from comment #1) I'm the author of "PowerMac G5 quad-core, CPU A1 DIODE TEMP" from back in 2015-Jan. At the time I had side by side comparison machines that were a mix of working well vs. overheating. My conclusion was that the cooling systems were in a failure mode for those overheating --since other matching machines were doing fine. As I remember Mac OS X had fancier handling of the issue that prevented crashing by forcing idle time in addition to fan-speed control but the result was a large difference in performance for "works well" vs. "overheating" for the same load. At the time some FreeBSD changes were made by Justin Hibbits that did improve things some for the problem machines. But the overheating machines were pretty far gone and I gave up on them. I returned those that were overheating. So I no longer have a test-context for overheating. -- You are receiving this mail because: You are the assignee for the bug.
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