From: "Hervé Fache" <herve.fache@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Scanner/webcam not working when connected to USB hub
Date: Mon, 5 Dec 2005 11:19:05 -0200 [thread overview]
Message-ID: <4413284c0512050519n67c50a88t@mail.gmail.com> (raw)
Hello guys,
I have the following problem: if connected directly to my computer's
USB ports, my webcam works correctly, but when connected through my
'AirVast' hub (124a:168b), it fails. The device is reported by lsusb
(IDs correct), but it does not work. The worst is: I have tried using
some proprietary OS, and it all worked there.
There are two possibilities (did I miss one?) I guess: either libusb
is playing, or the kernel USB stack is.
Now, rather than giving work to others, I don't mind trying to find
the problem myself, but I would appreciate a pointer to how to debug
such a problem... Tools? Compilation options?
Cheers,
Hervé.
Kernel: 2.6.12 from Kubuntu
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 3
wHubCharacteristic 0x0002
No power switching (usb 1.0)
Ganged overcurrent protection
bPwrOn2PwrGood 1 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0xf0
PortPwrCtrlMask 0x37
Hub Port Status:
Port 1: 0000.0103 power enable connect
Port 2: 0000.0100 power
Port 3: 0000.0103 power enable connect
next reply other threads:[~2005-12-05 13:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-05 13:19 Hervé Fache [this message]
2005-12-06 21:14 ` Greg KH
2005-12-07 0:41 ` Re : " Hervé Fache
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=4413284c0512050519n67c50a88t@mail.gmail.com \
--to=herve.fache@gmail.com \
--cc=herve@lucidia.net \
--cc=linux-kernel@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome