[GRLUG] usb stuff

[Michael Mol]

On Tue, Jun 22, 2010 at 3:47 PM,  <topher at t1kdevelopment.com> wrote:
> On Tue, 22 Jun 2010, Michael Mol wrote:
>
>> On Tue, Jun 22, 2010 at 3:42 PM,  <topher at t1kdevelopment.com> wrote:
>>>
>>> On Tue, 22 Jun 2010, Michael Mol wrote:
>>>
>>>> On Tue, Jun 22, 2010 at 3:04 PM,  <topher at t1kdevelopment.com> wrote:
>>>>>
>>>>> I have a sansa clip that works great in linux.  Every now and again
>>>>> though,
>>>>> plugging in USB things seems to not be noticed, or only half noticed by
>>>>> my
>>>>> system.
>>>>>
>>>>> For example, my clip is usually loaded at /dev/sdb when I plug it in.
>>>>>  At
>>>>> the moment, it doesn't get anything at all in /dev/.  However, lsusb
>>>>> lists
>>>>> it just fine.
>>>>>
>>>>> What might be broken, and what should I restart to get it back?
>>>>>
>>>>> Topher
>>>>
>>>> Check dmesg. It could be a race condition where the device doesn't get
>>>> itself initialized before the kernel/hotplug/udev asks it for some
>>>> stuff related to creating device nodes.
>>>
>>> There's this:
>>>
>>> usb 2-1: new high speed USB device using ehci_hcd and address 18
>>> hub 2-0:1.0: unable to enumerate USB device on port 1
>>> usb 2-1: new high speed USB device using ehci_hcd and address 19
>>>
>>>
>>> But it doesn't mean much to me.  :(
>>
>> You should see some mentions of SCSI after that; flash drives are
>> operated as SCSI devices.
>
> Nope, those are the last three lines of dmesg.

Best remaining suggestion is to try different USB ports. Other than
that, it may be dying. Relevant bits of dmesg on the "half-working"
occasions would be interesting.

-- 
:wq

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