All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Petr Kubánek" <petr@kubanek.net>
To: linux-hotplug@vger.kernel.org
Subject: How is /dev/bus/usb created - /dev/bus/usb lost during system
Date: Thu, 18 Mar 2010 01:24:58 +0000	[thread overview]
Message-ID: <1268875500.9683.64.camel@epsilon> (raw)

Hi,

I lost /dev/bus/usb during remote system upgrade (Ubuntu 9.04 -> 9.10)
on Watcher telescope control computer (@Boyden observatory, South
Africa).

I do not see /dev/bus/usb, and lsusb does not show anything. It worked
before, USB devices are present in dmesg, so I think USB subsystem is
working properly.

To debug this it will help me to know how udev creates and
populates /dev/bus/usb - which rule(s) does this, how to debug what
might be wrong.

We hit some problems during system upgrade, and I am pretty sure this is
related to them. I just need to debug the machine, which is while I am
in Europe and machine is in South Africa a bit difficult (and dangerous
to change anything, as it might not boot and then I have a problem
again..).

Thanks a lot for any hint.

Petr


             reply	other threads:[~2010-03-18  1:24 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-18  1:24 Petr Kubánek [this message]
2010-03-18  2:48 ` How is /dev/bus/usb created - /dev/bus/usb lost during system Greg KH
2010-03-18  8:51 ` Martin Pitt
2010-03-18 10:03 ` Petr Kubánek
2010-03-18 10:21 ` Kay Sievers
2010-03-18 10:31 ` Petr Kubánek
2010-03-18 10:37 ` Martin Pitt
2010-03-18 10:41 ` Kay Sievers
2010-03-18 10:42 ` Petr Kubánek
2010-03-18 14:26 ` Petr Kubánek
2010-03-18 16:46 ` Scott James Remnant

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1268875500.9683.64.camel@epsilon \
    --to=petr@kubanek.net \
    --cc=linux-hotplug@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.