23 reputation
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location Ontario
age 38
visits member for 1 year, 9 months
seen Jun 22 at 1:49

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Jun
22
comment Mail.app refuses to set accounts online
it's my mail server, I am in charge. What I see is that mail.app isn't actually attempting to do anything, it just fails without trying. This behaviour goes away when I quit Mail.app and run it again.
Jun
18
asked Mail.app refuses to set accounts online
Feb
20
awarded  Benefactor
Feb
20
awarded  Scholar
Feb
20
awarded  Supporter
Feb
20
accepted 2012 MacBook Air - USB hardware ran out of device slots?
Feb
20
comment 2012 MacBook Air - USB hardware ran out of device slots?
Unloading the kexts (in a shell script, since the keyboard is a USB device) causes an immediate panic and reboot. Your answer doesn't solve the problem, but it provides very valuable information and a few directions to pursue in resolving it. Thank you, I'm accepting this answer and awarding the bounty to you.
Feb
18
comment 2012 MacBook Air - USB hardware ran out of device slots?
"The log snippet posted does indicate what I addressed above: too many USB 3.0 devices connected to the root XHCI hub." -- doesn't this indicate a driver bug? I don't have more than one device plugged into the port (and it's not a hub)... isn't the driver forgetting to clean up after itself?
Feb
17
comment 2012 MacBook Air - USB hardware ran out of device slots?
I appreciate your taking the time to answer, but I would like to know how you are certain that it is a software issue (I suspect it is as well). Also, if it is a software issue, is there an easy way to reinstall just the specific subsection (XHCI drivers?) that would be causing the issue?
Feb
17
comment 2012 MacBook Air - USB hardware ran out of device slots?
I've edited my question to address your assumptions. Unfortunately no, this Mac was a brand new install, not a migration from my older MBA. There wasn't anything copied over, no settings or any applications.
Feb
17
comment 2012 MacBook Air - USB hardware ran out of device slots?
One other thing... you mention that you can recreate the issue. How are you doing it? Do you require a reboot to clear the error?
Feb
17
comment 2012 MacBook Air - USB hardware ran out of device slots?
Thank you for your detailed answer, but I think you're assuming that the problem occurs when I use external hubs / chain hubs together. I've updated my question to include more detail, in particular the fact that USB thumb drives (no cables) and low-speed and externally-powered equipment (JTAG/serial adapters, etc.) still exhibit the issue. Excellent catch on the power supply, but I do have the bigger (85W) adapter. Problem occurs whether it's plugged in to AC power or not.
Feb
17
revised 2012 MacBook Air - USB hardware ran out of device slots?
add more detail after offering bounty and seeing answers focusing on incorrect assumptions
Feb
16
awarded  Promoter
Feb
13
awarded  Editor
Feb
13
revised 2012 MacBook Air - USB hardware ran out of device slots?
adjust title, didn't realize it was double-worded, added sentence about usual suspects
Feb
12
awarded  Student
Feb
12
asked 2012 MacBook Air - USB hardware ran out of device slots?
Oct
18
comment USB intermittently not working - requires restart - what to try next?
I have been having this problem intermittently on my 2012 11" MBA. Reboot fixes it. It's not a powering issue; I can try to power the device (any device) externally and the port is still deaf. SMC/PRAM reset is inconclusive since the reboot will fix it on its own.