Date: Sun, 14 Jul 2019 19:46:31 -0500 From: Justin Hibbits <jrh29@alumni.cwru.edu> To: Jason Bacon <bacon4000@gmail.com> Cc: "freebsd-ppc@freebsd.org" <freebsd-ppc@freebsd.org> Subject: Re: iichb0: I2C error Message-ID: <CAHSQbTDDaJ0c%2B_E4T0YGbAdVka3bnFP9Rec71j2c2qToYFqLuQ@mail.gmail.com> In-Reply-To: <bde639cb-bfab-3da3-f896-538c540b25b7@gmail.com> References: <bde639cb-bfab-3da3-f896-538c540b25b7@gmail.com>
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On Sat, Jul 13, 2019 at 9:32 AM Jason Bacon <bacon4000@gmail.com> wrote: > > > On my PowerMac G5, I consistently get this error after a cold boot: > > iichb0: I2C error > > After a minute or so, the fans ramp up to maximum. > > The error also consistently goes away after a warm reboot. Nothing more > in dmesg: > > FreeBSD powermacg5.acadix bacon ~ 211: dmesg|grep iichb0 > iichb0: <Keywest I2C controller> mem 0xf8001000-0xf8001fff irq 42 on unin0 > iicbus0: <OFW I2C bus> on iichb0 > iichb0: I2C error > iichb0: <Keywest I2C controller> mem 0xf8001000-0xf8001fff irq 42 on unin0 > iicbus0: <OFW I2C bus> on iichb0 > > No more runaway fans. > > Does this provide any clues about the cause? Hi Jason, How recently did this start occurring? Would you be able to bisect the builds from a known-good starting point? Thanks. - Justin
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