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List:       freebsd-hardware
Subject:    Re: kernel: uhub_reattach_port: giving up port reset - device vanished
From:       Hans Petter Selasky <hps () selasky ! org>
Date:       2018-11-24 9:03:41
Message-ID: 7f31c23a-aedf-e532-b16d-f0d5a0edbbcf () selasky ! org
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On 11/24/18 9:42 AM, Hans Petter Selasky wrote:
> On 11/23/18 6:51 PM, tech-lists wrote:
>> Hi,
>>
>> On a 12.0-BETA2 system, am seeing lots of this in /var/log/messages:
>>
>> uhub_reattach_port: giving up port reset - device vanished
>> uhub_reattach_port: giving up port reset - device vanished
>> uhub_reattach_port: giving up port reset - device vanished
>>
>> last message repeated 496 times
>>
>> There's only two things usb on this machine, a usb3 pci card (which has
>> nothing plugged into it) and a usb2 wireless key plugged into the usb
>> system built into the motherboard. It's detected as run0. The device
>> works fine, doesn't drop packets.
>>
>> How can I debug this? Should I upgrade to 12-PRERELEASE (or whatever the
>> latest is) first?
> 
> Hi,
> 
> There hasn't been any USB changes in this area. Likely you have a broken 
> or unsupported USB device, which doesn't enumerate properly. I see this 
> on my computer with a USB bluetooth device, which because it doesn't 
> receive valid firmware at first boot, becomes in-accessible. Maybe you 
> can disable some such USB devices in the BIOS.
> 
> --HPS
> 

BTW: There are some USB knobs to disable USB enumeration:

sysctl -a | grep disable_enumeration

--HPS
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