Auto-loading of usbserial in 2.6 kernel?

Auto-loading of usbserial in 2.6 kernel?

[LEE, Yui-wah (Clement)]

Hi,

I have a usbserial device (Novatel V620 EVDO modem)
that worked when I manually loaded the kernel module by
the command:

  modprobe usbserial vendor=0x1410 product=0x1110

However, on a 2.6 kernel, I could not get the usbserial
to be automatically loaded when the card was detected
(coldplugging). Specifically, I added reasonably
entries into /etc/hotplug/usb.handmap and
/etc/modprobe.d/ to no avail.

In contrast, on a 2.4 kernel (2.4.18), I could get the
usbserial to be automatically loaded by adding the
following line to /etc/hotplug/usb.handmap

usbserial          0x0003 0x1410   0x1110    0x0000       0x09   0x00         0x00            0x09            0x00            0x00   0x00000000

and the following line to /etc/modules.conf

options usbserial vendor=0x1410 product=0x1110

Any suggestion?

I have read all the documentations on various places including
http://linux-hotplug.sourceforge.net/   I also googled
around quite a lot on the Internet but could not find
the answer.

Clement




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Re: Auto-loading of usbserial in 2.6 kernel?

[Scott James Remnant]

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On Wed, 2006-05-17 at 16:55 -0400, LEE, Yui-wah (Clement) wrote:

> I have a usbserial device (Novatel V620 EVDO modem)
> that worked when I manually loaded the kernel module by
> the command:
> 
>   modprobe usbserial vendor=0x1410 product=0x1110
> 
Add an /etc/modprobe.d/* file that contains the following:

	options usbserial vendor=0x1410 product=0x1110

	alias usb:v1410p1110d*dc*dsc*dp*ic*isc*ip* usbserial


The first line provides the necessary options when the usbserial driver
is loaded, the second line actually associates the driver with the
device so that it is loaded.

Note that on 2.6.15 (at least, in Ubuntu) this device is associated with
the "airprime" driver already -- which depends on usbserial.

Scott
-- 
Scott James Remnant
scott@ubuntu.com

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Re: Auto-loading of usbserial in 2.6 kernel?

[LEE, Yui-wah (Clement)]

Dear Scott,

Thanks for your prompt response!

I tried adding the two lines, but still the kernel
module was not automatically loaded.

On the other hand, when I manually loaded the kernel
module, at least now I could use simply the command
"modprobe usbserial" but not the more elobrate
"modprobe usbserial vendor=0x1410 product=0x1110".  I
think this may mean that the first line ("options ...")
is now having a good effect.

Is the syntax for the second line (alias usb:v1410...")
documented somewhere?  How did you come up with the
string?

I have another related question.  After I add something
into /etc/modprobe.d, do I need to run some command to
get the effect of the new entries?  E.g. In the old
/etc/modules.conf (for kernel 2.4), and in Debian
(which I am using), I know there was a command called
update-modules.  But now on my Debian (in kernel 2.6)
the manpage of update-modules said the command is
obsolete.  I read "man 5 modprobe.conf" and could not
find any specific instruction.

Thanks a lot!

Clement

On Wed, 17 May 2006, Scott James Remnant wrote:

> On Wed, 2006-05-17 at 16:55 -0400, LEE, Yui-wah (Clement) wrote:
>
> > I have a usbserial device (Novatel V620 EVDO modem)
> > that worked when I manually loaded the kernel module by
> > the command:
> >
> >   modprobe usbserial vendor=0x1410 product=0x1110
> >
> Add an /etc/modprobe.d/* file that contains the following:
>
> 	options usbserial vendor=0x1410 product=0x1110
>
> 	alias usb:v1410p1110d*dc*dsc*dp*ic*isc*ip* usbserial
>
>
> The first line provides the necessary options when the usbserial driver
> is loaded, the second line actually associates the driver with the
> device so that it is loaded.
>
> Note that on 2.6.15 (at least, in Ubuntu) this device is associated with
> the "airprime" driver already -- which depends on usbserial.
>
> Scott
>



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Re: Auto-loading of usbserial in 2.6 kernel?

[Greg KH]

On Thu, May 18, 2006 at 10:55:26AM -0400, LEE, Yui-wah (Clement) wrote:
> Dear Scott,
> 
> Thanks for your prompt response!
> 
> I tried adding the two lines, but still the kernel
> module was not automatically loaded.
> 
> On the other hand, when I manually loaded the kernel
> module, at least now I could use simply the command
> "modprobe usbserial" but not the more elobrate
> "modprobe usbserial vendor=0x1410 product=0x1110".  I
> think this may mean that the first line ("options ...")
> is now having a good effect.

Please upgrade your kernel so you use the correct driver (not the
usb-serial generic one.)

> Is the syntax for the second line (alias usb:v1410...")
> documented somewhere?  How did you come up with the
> string?

It's documented in the kernel source.  You can look in the sysfs file
called 'modalias' in the usb device's directory and see this value.

thanks,

greg k-h


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Re: Auto-loading of usbserial in 2.6 kernel?

[LEE, Yui-wah (Clement)]

Dear Greg,

Thanks!  Would kernel 2.6.15 be recent enough? (I was using 2.6.8).

Clement

On Thu, 18 May 2006, Greg KH wrote:

> On Thu, May 18, 2006 at 10:55:26AM -0400, LEE, Yui-wah (Clement) wrote:
> > Dear Scott,
> >
> > Thanks for your prompt response!
> >
> > I tried adding the two lines, but still the kernel
> > module was not automatically loaded.
> >
> > On the other hand, when I manually loaded the kernel
> > module, at least now I could use simply the command
> > "modprobe usbserial" but not the more elobrate
> > "modprobe usbserial vendor=0x1410 product=0x1110".  I
> > think this may mean that the first line ("options ...")
> > is now having a good effect.
>
> Please upgrade your kernel so you use the correct driver (not the
> usb-serial generic one.)
>
> > Is the syntax for the second line (alias usb:v1410...")
> > documented somewhere?  How did you come up with the
> > string?
>
> It's documented in the kernel source.  You can look in the sysfs file
> called 'modalias' in the usb device's directory and see this value.
>
> thanks,
>
> greg k-h
>



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Re: Auto-loading of usbserial in 2.6 kernel?

[Greg KH]

On Thu, May 18, 2006 at 11:51:29AM -0400, LEE, Yui-wah (Clement) wrote:
> Dear Greg,
> 
> Thanks!  Would kernel 2.6.15 be recent enough? (I was using 2.6.8).

I think so, but why not use 2.6.16 just to be sure :)

thanks,

greg k-h


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Re: Auto-loading of usbserial in 2.6 kernel?

[Alexander E. Patrakov]

LEE, Yui-wah (Clement) wrote:

> Thanks!  Would kernel 2.6.15 be recent enough? (I was using 2.6.8).

Yes, but you need to upgrade udev to the latest version. There is no version of
udev compatible with both 2.6.8 and 2.6.15 kernels.

If you just upgrade to Debian Testing, both packages will be updated properly.

-- 
Alexander E. Patrakov



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Re: Auto-loading of usbserial in 2.6 kernel?

[LEE, Yui-wah (Clement)]

Hi,

I just want to thank everyone who gave me the important
hints.

I upgraded the kernel to 2.6.15 and now the usbserial
kernel module would be automatically loaded.  (The
device was an Airprime PC5220 EVDO modem or a Novatel
V620 EVDO modem.)

One thing I notice is that I actually do not need any
entries in /etc/modprobe.d/

I also notice that on my platform udev is not
installed, yet the auto-loading still works.  The
usbserial device is attached to /dev/ttyUSB0.

Thanks!

Clement

On Fri, 19 May 2006, Alexander E. Patrakov wrote:

> LEE, Yui-wah (Clement) wrote:
>
> > Thanks!  Would kernel 2.6.15 be recent enough? (I was using 2.6.8).
>
> Yes, but you need to upgrade udev to the latest version. There is no version of
> udev compatible with both 2.6.8 and 2.6.15 kernels.
>
> If you just upgrade to Debian Testing, both packages will be updated properly.
>
>




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