Recent Posts

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Applications and Porting / Re: [DEV] Porting homebrew to Linux ppc64le
« Last post by tle on Today at 07:32:19 am »
I have made progress with this port with more formula binaries, for example gcc. It is now much easier for everyone to give it a try :)
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I had some trouble with a wired Ethernet dongle earlier. It wouldn't come up in Petitboot, so it didn't come up (automatically) in Fedora until I hotplugged it. Does this have that issue?

Which product are you using? I do not have the similar issue with this dongle.
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General Discussion / Re: noise levels, sound dampening, tempered glass cases
« Last post by tle on May 27, 2020, 08:33:01 pm »
I have been running the BB on top of a test bench. On full load, the fan could produce 38 to 43dB which is quite okay IMHO. On idle it is very silent (< 10dB)
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Applications and Porting / [OS] Fedora Silverblue download link
« Last post by tle on May 26, 2020, 10:02:45 am »
Fedora Silverblue OS supports ppc64le however they did not update their website with download link.

After my PR https://github.com/fedora-silverblue/silverblue-site/pull/83 is merged, you would be able to find the ISO from download page.
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Firmware / Re: Blackbird firmware build fails on Blackbird
« Last post by manatails on May 24, 2020, 11:41:50 pm »
Discussed this some with the IBM team, the issue will be handled here:

https://github.com/open-power/op-build/issues/3634

Thank you for reporting it. I hope the patch gets delivered to repos soon.
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Blackbird / Re: How many fans per FAN header?
« Last post by MPC7500 on May 23, 2020, 11:43:46 am »
I don't think this will make any difference. Because the bottleneck will still be the Y-cable and not the fan connector itself.
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Blackbird / Re: How many fans per FAN header?
« Last post by tle on May 23, 2020, 10:22:08 am »
Thanks for everyone's response.

I would not risk hooking up cheap fans into one same fan header nor having a total of more than 1A (from what I read 1A is a safe threshold...).

Alternatively like surf has suggested, I could use the PSU to power my fans instead, I guess it would be much safer.

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Blackbird / Re: Blackbird memory options...
« Last post by ClassicHasClass on May 22, 2020, 09:45:10 pm »
The other question is rank. I haven't gotten a straight answer on this from the IBM docs.
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Operating Systems and Porting / Re: Running a Windows VM on Fedora 32
« Last post by ClassicHasClass on May 22, 2020, 09:43:50 pm »
That I don't know, I only run Windows 98 on mine. I'll look into it when I get a little time unless someone here is already running W10.
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Blackbird / Re: How many fans per FAN header?
« Last post by madscientist159 on May 22, 2020, 12:52:00 pm »
So if you look at the schematics, you can see the fan power pins are wired straight to the main +12V supply rail.  This in turn is normally provided through either a power plane or a fat trace, meaning the power limit will be the fan header itself -- in fact, given the fan power header is comprised of standard stake pins, the power limit is more precisely in the fan connector itself.  Many of the cheapest Chinese fan connectors appear to use non-soldered (crimped) connections to what seems to be horse hair instead of copper wire, meaning I would be very concerned about pulling even an amp though them.

If you can get a high quality connector, the fan headers themselves are likely good for ~5A.  Problem is, if your connector melts down / catches fire, it will damage the header and the PCB, and that would not be covered under warranty, so please be sure of the quality of the mating connector before trying to pull 5A...  ;)
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