Date: Wed, 4 Nov 2015 09:32:30 +0200 From: Jukka Ukkonen <jau789@gmail.com> To: freebsd-ppc@FreeBSD.org Subject: PowerMac G5 running 11-current kernel fails to read temperature sensors Message-ID: <676DB1F1-EA3A-4B85-8A41-0ACE2BDE34F7@gmail.com>
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Hello all, Just a quick question... Has anyone else tried to build a ppc64 (GENERIC64) kernel locally on a PowerMac G5 during the last month or so? When booting the CD snapshot kernel of Oct 2nd there are no worries. Then again when I try to use a locally built kernel using the latest sources from head, the system starts complaining about I2C read errors and errors when trying to read max6690 sensors. Those complaints repeat about 5 times after which the system powers down automatically. There is no genuine risk of overheating, though. When running the snapshot kernel of Oct 2nd the CPU sensors show temperatures around 45-50 C. All of the other sensors including the two max6690 sensors show values in the range of 25-45 C. When using the older snapshot kernel all of the temperature sensors are visible in "sysctl dev" output. When using the latest and greatest locally built kernel trying the same sysctl only hangs when it triggers reading of those sensors while I get to watch the complaints about I2C read failures. With the older snapshot kernel the fans keep operating at relatively slow speeds. With the locally built latest and greatest kernel the fans keep adding rpms step by step to plain crazy speeds until the system powers down. Does this ring any bells? Have there been any changes to the I2C drivers or temperature sensor drivers during the last month or so? Is there something I should try to inspect the issue further? --jau
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