[lug] Newbie tries to make laptop modem work

[D. Stimits]

Glenn Murray wrote:
> 
> John,
> 
> Thanks for the response; it's good to know there is hope.  I tried
> adding the alias line to /etc/modutils/aliases but it still seems to
> have a problem.
> 
> glenn/$ sudo update-modules
> depmod: *** Unresolved symbols in /lib/modules/2.2.19/misc/lt_serial.o

Your module does not match your kernel. If you want to get pickier, the
kernel is expecting symbols in the module that point at matching module
handlers, and either they don't exist, or they are at the wrong offset,
or they exist but are shaped differently (function signature must match
kernel's idea, and the kernel must look in the right location). Perhaps
the module was compiled against a kernel that has been configured
differently than the kernel that is running. Configuring a kernel alters
headers and configuration files, so having the same kernel version isn't
enough. Sometimes people compile using everything correctly, but don't
realize they're using two different compilers for the module and kernel,
which will also cause "bad things" to happen.

D. Stimits, stimits at idcomm.com

> 
> And in /etc/modules.conf:
> # For the LTmodem
> alias char-major-62 lt_serial
> 
> I'm pretty sure I've installed the correct packages:
> glenn/$ ll /vmlinuz
> lrwxrwxrwx    1 root     root           20 Nov 26 12:33 /vmlinuz -> /boot/vmlinuz-2.2.19
> glenn/$ sudo dpkg -l | grep ltmodem
> rc  ltmodem-2.2.18 6.00b6         Half open sourced driver for Lucent(r) Linmo
> ii  ltmodem-2.2.19 6.00b6         Half open sourced driver for Lucent(r) Linmo
> 
> When the package installed it created the ff:
> glenn/$ ll /dev/modem
> lrwxrwxrwx    1 root     root           11 Nov 27 14:12 /dev/modem -> /dev/ttyLT0
> glenn/$ ll /dev/ttyLT0
> crw-rw----    1 root     dialout   62,  64 Nov 27 14:12 /dev/ttyLT0
> 
> I'd appreciate it any more help.  Please send the attachments to
> gmurray at mines.edu.
> 
> Thanks,
> Glenn Murray
> www.mines.edu/~gmurray/public_html/Welcome.html
> 
> On Tue, 27 Nov 2001, John Karns wrote:
> > On Tue, 27 Nov 2001, Glenn Murray said:
> > > PCI devices found:
> > > ....
> > >   Bus  0, device  16, function  0:
> > >     Communication controller: Lucent (ex-AT&T) Microelectronics L56xMF (rev 0).
> > >       Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master Capable.  Latency=64.  Min Gnt=252.Max Lat=14.
> > >       Non-prefetchable 32 bit memory at 0xfedffc00 [0xfedffc00].
> > >       I/O at 0xf4c8 [0xf4c9].
> > >       I/O at 0xf800 [0xf801].
> >
> > I've had good luck with these - I have Dell and Compaq laptops with this
> > series modem, and both work with Linux.  I've used it with several 2.2
> > kernels, mostly with 2.2.19 and 2.2.20
> >
> >
> > > depmod: *** Unresolved symbols in /lib/modules/2.2.19/misc/lt_serial.o
> >
> > Looks like you may have to edit /etc/modules.conf.  I have a line in that
> > file as follows:
> >
> > # lt_drivers: autoloading and insertion parameter usage
> > alias char-major-62 lt_serial
> >
> > which was added by a package that I DL'd and installed.  It corresponds to
> > the following device in /dev which the pkg also set up:
> >
> > -ttyS14   62, 78 Jun  8 20:18
> >
> > I can't seem to find the URL, and I've looked through the doc's that were
> > included in the pkg.  If you would like, I could send it as an attachment
> > off-list.  The name of the tar file which I have is 'ltmodem-5.99b.tgz'
> > and was dated May 2001.  It also includes some scripts to help
> > troubleshoot problems.
> >
> > ----------------------------------------------------------------
> > John Karns                                        jkarns at csd.net
> >
> > _______________________________________________
> > Web Page:  http://lug.boulder.co.us
> > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> >
> 
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