iichb0: I2C error

[Jason Bacon]

Just rebooted again and now everything is fine.  No I2C issues, sysctl 
works fine.

The seemingly random nature of the problem suggests a to me an 
uninitialized variable.  I don't know much about FreeBSD I2C drivers, 
though, so that's just a quasi-educated guess.

On 2019-08-04 08:54, Jason Bacon wrote:
>
> sysctl just hangs here:
>
> root at powermacg5:/home/bacon # sysctl -a|grep temp
> net.inet6.ip6.use_tempaddr: 0
> net.inet6.ip6.temppltime: 86400
> net.inet6.ip6.tempvltime: 604800
> net.inet6.ip6.prefer_tempaddr: 0
> hw.usb.template: -1
>
> Then dmesg shows:
>
> iichb0: I2C error
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus read failed
> ad74171: iicbus read failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus read failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus write failed
> ad74171: iicbus read failed
>
> Again, this is on 12.0-RELEASE and I use it only for ports testing.
>
> Thanks,
>
>     JB
>
> On 2019-08-04 08:46, Francis Little wrote:
>> Hi, I get loud fans on my G5 after a few mins (running 13-CURRENT).
>>
>> When the fans rev up, If you run something like:
>>
>> sysctl -a | grep temp:
>>
>> do they calm down?
>>
>> On mine it does so I have it in my crontab every 60 secs at the moment!
>>
>> Regards
>>
>> On Sun, 4 Aug 2019 at 14:38, Jason Bacon <bacon4000 at gmail.com 
>> <mailto:bacon4000 at gmail.com>> wrote:
>>
>>     On 2019-07-14 20:58, Jason Bacon wrote:
>>     > On 2019-07-14 19:46, Justin Hibbits wrote:
>>     >> On Sat, Jul 13, 2019 at 9:32 AM Jason Bacon
>>     <bacon4000 at gmail.com <mailto:bacon4000 at 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
>>     > I've never run a powerpc system until a few months ago, and this
>>     has
>>     > always been an issue on the PowerMac.  I just recently
>>     established the
>>     > pattern that it only happens after a cold boot, though. I also 
>> have
>>     > an iMac G5 that does not exhibit this issue. Both are running
>>     > 12.0-RELEASE.  If you think it might help, I can try a 13
>>     snapshot at
>>     > some point.
>>     >
>>     > Cheers,
>>     >
>>     >     JB
>>     >
>>     Cancel that pattern claim.  I've now seen it occur after a couple of
>>     warm boots as well.  If I keep rebooting the problem eventually 
>> stops.
>>
>>     Always seems to follow I2C error in dmesg, though.
>>
>>     Trying to mount root from ufs:/dev/ada0s3 [rw]...
>>     SMP: 2 CPUs found; 2 CPUs usable; 1 CPUs woken
>>     lo0: link state changed to UP
>>     gem0: link state changed to DOWN
>>     gem0: link state changed to UP
>>     Security policy loaded: MAC/ntpd (mac_ntpd)
>>     iichb0: I2C error
>>     FreeBSD powermacg5.acadix  bacon ~ 835:
>>
>>     Fans go nuts after a few minutes.
>>
>>     Reboot...
>>
>>     Trying to mount root from ufs:/dev/ada0s3 [rw]...
>>     SMP: 2 CPUs found; 2 CPUs usable; 1 CPUs woken
>>     lo0: link state changed to UP
>>     gem0: link state changed to DOWN
>>     gem0: link state changed to UP
>>     Security policy loaded: MAC/ntpd (mac_ntpd)
>>     FreeBSD powermacg5.acadix  bacon ~ 835:
>>
>>     No fan issues.
>>
>>     --     Earth is a beta site.
>>
>>
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>>
>
>


-- 
Earth is a beta site.