12.0-RELEASE: I2C errors, fan speed problems, and USB problems

[Tom Pusateri]

> On Dec 16, 2018, at 12:39 AM, Koakuma via freebsd-ppc <freebsd-ppc at freebsd.org> wrote:
> 
> So recently I booted the 12.0 memstick image on my G5 (11,2 dual-core,
> 2 GHz, 16 GiB of memory), in the "Live CD" mode to try things out.
> 
> For some reason, the OS runs very slowly and it gives me those errors
> all the time:
> 
> max66900: iicbus read failed
> max66901: iicbus read failed
> iichb0: I2C error
> ds16310: iicbus read failed
> ds16310: ds1631 read config failed: ffffffff
> ds16310: iicbus read failed
> ds16310: ds1631 read TEMP failed: ffffffff
> ds17750: iicbus read failed
> 
> And the fan keeps running at max speed.
> 
> Also, there's another weird issue:
> If I disable SMP, all USB peripherals (except the included Apple A1048
> keyboard and the flash drive I'm using to boot) won't work at all.
> On the other hand, if I enable SMP, all USB peripherals will work fine,
> but I get the random hangs, similar to the ones reported by other
> G5 users.
> 
> Any workarounds for those issues?

I tried 12.0-RC3 on my G5 (7,2 dual core) and saw some i2c errors but my fans worked correctly.

I then tried Ubuntu 16.04 LTS without any trouble and the latest Gentoo and initially my kernel didn’t have windfarm support but after adding it, the fans are working correctly with Gentoo as well.

I had trouble with FreeBSD 12.0-RC3 USB ports when I plugged in the Apple 23” Cinema Display USB hub with the keyboard attached. The keyboard wouldn’t work. But when I plugged an Apple USB keyboard directly into one of the PowerMac rear USB ports, I didn’t have any trouble.

Tom