USB Hub Slows Startup

[cgscotto]

Hello Everyone,

I don't have a problem. I solved one, so I thought I would post my solution in case anyone else has a similar problem.

My Mac Pro 6,1 has an internal NVME drive in an adapter, and I am running Mojave 10.14.3. All was fine until recently. The time between the POST chime and the appearance of the Apple logo and progress bar had increased to anywhere from 3 to 5 minutes. I thought it was NVME related, so I checked that I had the correct startup disk selected. All was fine.

I finally noticed during startup that some of my USB devices, specifically a midi keyboard and the power lights on a couple of hard drives, were blinking for a long time and then would stop before the Apple logo appeared.

I had a USB 2.0 hub plugged into a USB 3.0 hub that was plugged into the USB port on the Mac Pro. I had the midi keyboard and a printer plugged into the USB 2.0 hub. I removed the USB 2.0 hub and connected the keyboard and printer to the 3.0 hub, and the entire startup sequence from the press of the power button to the appearance of the desktop was back to about 30 seconds. I shut the machine down and powered it up a few times just to make sure that fixed the issue, and it did.

I have never had a problem like this from daisy chaining devices or hubs. Anyway, I just thought I would post my experience as a PSA in case it helps anyone else with a similar problem.

 

[t8er8]

Hello Everyone,

I don't have a problem. I solved one, so I thought I would post my solution in case anyone else has a similar problem.

My Mac Pro 6,1 has an internal NVME drive in an adapter, and I am running Mojave 10.14.3. All was fine until recently. The time between the POST chime and the appearance of the Apple logo and progress bar had increased to anywhere from 3 to 5 minutes. I thought it was NVME related, so I checked that I had the correct startup disk selected. All was fine.

I finally noticed during startup that some of my USB devices, specifically a midi keyboard and the power lights on a couple of hard drives, were blinking for a long time and then would stop before the Apple logo appeared.

I had a USB 2.0 hub plugged into a USB 3.0 hub that was plugged into the USB port on the Mac Pro. I had the midi keyboard and a printer plugged into the USB 2.0 hub. I removed the USB 2.0 hub and connected the keyboard and printer to the 3.0 hub, and the entire startup sequence from the press of the power button to the appearance of the desktop was back to about 30 seconds. I shut the machine down and powered it up a few times just to make sure that fixed the issue, and it did.

I have never had a problem like this from daisy chaining devices or hubs. Anyway, I just thought I would post my experience as a PSA in case it helps anyone else with a similar problem.

I’m on a 5,1 booting with a pcie nvme ssd and this happens to me too, if I have a USB key in as I’m shutting down, the read write light starts to flash on the USB key and it takes forever to shut down. Can’t figure out why it happens. I’ve tried it with the key newly formatted to hfs+ and fat32 with same results.

 

[cgscotto]

I’m on a 5,1 booting with a pcie nvme ssd and this happens to me too, if I have a USB key in as I’m shutting down, the read write light starts to flash on the USB key and it takes forever to shut down. Can’t figure out why it happens. I’ve tried it with the key newly formatted to hfs+ and fat32 with same results.

I am hoping the next firmware update that will come with the 10.14.4 update solves the problem. It would be interesting to know if anyone running the 141.0.0.0.0 on a 5,1 or 128.0.0.0.0 on a 6,1 experiences the problem. It just seems wonky because USB 3.0 should be backwards compatible. My 2.0 devices all work without a problem, it was just the hub.