MP 7,1 Sonnet Allegro Pro USB 3.1 PCIe problem

Hydle

macrumors newbie
Original poster
Jan 10, 2020
11
2
Hi guys,

I bought this PCIe card to connect some usb hardware without having to use another hub or dock like I had in my previous iMac.

Two days ago it stopped recognising stuff whenever I start/restart the MP. I always need to reconnect everything before they appear as connected.

Does anyone know why this is happening?

Thanks
 
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IndioX

macrumors 6502a
Oct 1, 2018
824
328
austria/europe
plug some power-hungry devices without self-power together will kill the card

i have 2 of this sonnet before i go to the highpoint card
and use self-powered USB3.1 hubs between for this devices
they don't need the full speed of the card
 

Hydle

macrumors newbie
Original poster
Jan 10, 2020
11
2
I'm using it for a Powered usb 3.0 hub and a secondary audio interface at the moment. Is this too much? It's my first time using PCIe with a mac.
Right now I have to unplug them and plug them back in every time I start the MP.

You say power-hungry devices will kill the card but it is still working... just not on startup?
 

erroneous

macrumors member
Jul 25, 2004
55
19
Does anyone know why this is happening?

Thanks
Unplug all the devices you have attached to this PCIe card.

Restart your Mac.

Then then...

  1. Plug in one device.
  2. Restart your Mac.
  3. Check how the device behaves after your reboot and note it down.
  4. Unplug this device.
  5. Restart your Mac.
  6. Plug in the next device.
  7. Restart your Mac.
  8. ...repeat until you run out of devices. :)

If all devices behave themselves individually, plug in one then repeat the above for all your remaining devices.

Repeat until you find all devices that work together and, hopefully, the one that causes everything to show the problematic post-restart behaviour you when you add it to the previous "good" devices.

If you don't find any weird behaviour, it could be positional - a particular set of devices in a particular combination of ports that share power, say.

It's boring, I know, but gives you data to work with. :)
 

Hydle

macrumors newbie
Original poster
Jan 10, 2020
11
2
Hi erroneous! Thank you for the detailed explanation. I will try that and see what device is causing the problem.
 
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macstatic

macrumors 65816
Oct 21, 2005
1,334
67
Norway
Did you find a solution?
I see it has built-in fuses -could this be the cause?
Resettable Fuses
The Allegro features a resettable fuse on each port to protect the card and computer should there be a cable or peripheral failure. Should a fuse trip on the Sonnet card, you can reset it simply by shutting down the computer.
... just in case you don't turn off the computer but leave it in sleep mode...

I'm considering buying this card myself (assuming you're referring to the 2 port USB-C Allegro USB3C-2PM-E). They all have very similar names which is confusing.
 
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