G5 support

[Michael Tuexen]

> On 19. Jun 2018, at 21:00, Ben Brink via freebsd-ppc <freebsd-ppc at freebsd.org> wrote:
> 
> Hi Michael,
> 
> Based on comments so far, symptoms indicate a possible power supply issue with decreasing power capacity or a peripheral that is shared between both systems that is drawing excessive power.
> 
> I've observed a few cases like this on various machines and OSes. If this is so, challenging the system with an extra load may be a quick way to test --and also a quick way to cause failure.
> 
> Reducing connected devices helps to reduce power usage.
> 
> CPU usage also draws power, which may be why symptoms are not noticed when MacOSes are installed. Systems may be more challenged under FreeBSD with comparatively more and varied number of services running in the background.
I was putting to systems under full load when testing under Mac OS X. Sometimes the system
shutdown down without any load when running under FreeBSD.

Will do some more testing.

However, I have four identical system (also of the same age) behave similar...
> 
> Swapping out the capacitors in a power supply with new ones usually is sufficient to restore most power on failing power units. Best to repair *before* it potentially damages other parts.
OK.

Best regards
Michael
> 
> cheers,
> Ben
> 
> On 06/19/2018 10:43 AM, Michael Tuexen wrote:
>>> On 19. Jun 2018, at 19:03, Rob Ballantyne <robballantyne3 at gmail.com> wrote:
>>> 
>>> These messages indicate the system is having trouble figuring out your disk.  It could be a 'bad' disk but I thought I would mention that I had similar problems (I didn't write them down so I can't absolutely confirm they are true) when I tried a new SATA3/flash drive on my system.  It appears that SATA3/flash is not supported currently (I would suspect no hardware support).
>> I'm using the drives that came with the systems... Just installed FreeBSD on it.
>> Best regards
>> Michael
>>> 
>>> Regards,
>>> Rob
>>> 
>>> On Tue, Jun 19, 2018 at 7:18 AM Michael Tuexen <Michael.Tuexen at macmic.franken.de> wrote:
>>>> On 19. Jun 2018, at 15:44, Nathan Whitehorn <nwhitehorn at freebsd.org> wrote:
>>>> 
>>>> If they don't boot, what errors do you get, if any? G5s on FreeBSD are usually boringly stable (mine are, certainly, currently running HEAD @ r333927).
>>> For example the messages end in (typed from screen):
>>> 
>>> (aprobe0:ata2:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
>>> (aprobe0:ata2:0:0:0): CAM status: Command timeout
>>> (aprobe0:ata2:0:0:0): Retrying command, 0 more tries remain
>>> (aprobe0:ata2:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
>>> (aprobe0:ata2:0:0:0): CAM status: Command timeout
>>> (aprobe0:ata2:0:0:0): Error 5, retries exhausted
>>> 
>>> which then is repeated a couple of times, and then the mountroot prompt shows up.
>>> 
>>> I installed FreeBSD on this disk, compiled a kernel, compiled a couple of
>>> ports...
>>> 
>>> Sometimes it boots... Any idea what could be wrong?
>>> 
>>> Best regards
>>> Michael
>>>> -Nathan
>>>> 
>>>> On 06/19/18 06:29, Michael Tuexen wrote:
>>>>> Dear all,
>>>>> 
>>>>> I have a couple of Dual core PowerMacs (PowerMac7,3) and they run Mac OS fine.
>>>>> Installing FreeBSD head of a couple of days ago also works fine, but the systems
>>>>> * don't boot reliably
>>>>> * once they boot they run fine for a while and then they shutdown
>>>>> Since they are running fine under Mac OS, I don't think there is a hardware
>>>>> error. Are these issues known? Anything I could try to improve the situation?
>>>>> 
>>>>> Best regards
>>>>> Michael
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>>>> 
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