From: Andrew Morton <akpm@linux-foundation.org>
To: Neil Kalo <neilkalo@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
Steve Holland <sdh4@iastate.edu>,
Oliver Neukum <oliver@neukum.org>
Subject: Re: usbmc seems broken
Date: Tue, 26 Jan 2010 17:01:25 -0800 [thread overview]
Message-ID: <20100126170125.d199e52c.akpm@linux-foundation.org> (raw)
In-Reply-To: <5c343a41001220840x6ce6bd29q3b69bbc978b1899f@mail.gmail.com>
(cc's added)
On Fri, 22 Jan 2010 16:40:06 +0000
Neil Kalo <neilkalo@gmail.com> wrote:
> I cannot get usbtmc to work with my device. I am using fedora 12:
> 2.6.31.12-174.2.3.fc12.i686.PAE
>
> Jan 22 15:40:26 localhost kernel: usb 4-1: new full speed USB device
> using ohci_hcd and address 4
> Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device found,
> idVendor=05e6, idProduct=2100
> Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device strings:
> Mfr=2, Product=3, SerialNumber=1
> Jan 22 15:40:26 localhost kernel: usb 4-1: Product: 2100 Multimeter
> Jan 22 15:40:26 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
> Jan 22 15:40:26 localhost kernel: usb 4-1: SerialNumber: 1160791
> Jan 22 15:40:26 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
> Jan 22 15:40:26 localhost kernel: usbtmc 4-1:1.0: can't read capabilities
>
> If I compile the original Agilent module from
> "http://www.home.agilent.com/upload/cmc_upload/All/usbtmc.html" It
> works fine:
>
> Jan 22 15:37:45 localhost kernel: usb 4-1: new full speed USB device
> using ohci_hcd and address 3
> Jan 22 15:37:45 localhost kernel: usb 4-1: New USB device found,
> idVendor=05e6, idProduct=2100
> Jan 22 15:37:45 localhost kernel: usb 4-1: New USB device strings:
> Mfr=2, Product=3, SerialNumber=1
> Jan 22 15:37:45 localhost kernel: usb 4-1: Product: 2100 Multimeter
> Jan 22 15:37:45 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
> Jan 22 15:37:45 localhost kernel: usb 4-1: SerialNumber: 1160791
> Jan 22 15:37:45 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
> Jan 22 15:37:45 localhost kernel: USBTMC: MKDEV
> Jan 22 15:37:45 localhost kernel: USBTMC: CDEV_ADD f900000 1
>
> Note that I do get one error line per module load, but this does not
> prevent the device from working in my application:
> Jan 22 15:38:21 localhost kernel: USBTMC: Unable to read data, error -110
>
> This error also sometimes occurs with the standard kernel module, but
> I never get a functioning connection to my device:
> Jan 16 23:43:36 localhost kernel: usbtmc 1-4.1.1:1.0: can't read capabilities
> Jan 16 23:52:31 localhost kernel: usbtmc 1-4.1.1:1.0: Unable to read
> data, error -110
>
> Where do I go from here?
next prev parent reply other threads:[~2010-01-27 1:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-22 16:40 usbmc seems broken Neil Kalo
2010-01-27 1:01 ` Andrew Morton [this message]
2010-01-27 1:59 ` Greg KH
2010-02-04 8:32 ` Neil Kalo
2010-02-24 2:18 ` Greg KH
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