[asterisk-users] problems inserting dahdi modules using Debian Leni

[covici at ccs.covici.com]

Shaun Ruffell <sruffell at digium.com> wrote:

> On 1/4/11 9:26 PM, covici at ccs.covici.com wrote:
> >
> > Shaun Ruffell<sruffell at digium.com>  wrote:
> >
> >> On 01/04/2011 05:09 PM, covici at ccs.covici.com wrote:
> >>> Hi.  I have a Debian Leni system  with asterisk-1.8.  I was trying to
> >>> get meetme to work and it depends on dahdi, so I compiled dahdi-trunk
> >>> and dahdi-tools-trunk, however, when trying to insert dahdi_dummy, it
> >>> complained about symbol crc_ccitt_table, although the module was
> >>> actually there in the kernel tree.  So, I took the Debian source, and I
> >>> had the config and I did make Bzimage, make modules and make
> >>> modules_install, but dahdi_dummy still complains about the same symbol,
> >>> it says no version for that symbol, so I am confused as to how to
> >>> resolve this so I can modprobe dahdi_dummy properly.
> >>>
> >>> Any ideas would be appreciated.
> >>>
> >>
> >> First off, I recommend using dahdi-linux 2.4.0 *without* compiling
> >> dahdi_dummy.  A dummy span is no longer needed for DAHDI to provide a
> >> timing source to asterisk.
> >>
> >> But you'll still need crc_ccitt module for dahdi to load, so that
> >> doesn't fix the problem as you describe here.
> >>
> >> If you rebuilt your kernel (which probably wasn't necessary...) you need
> >> to reboot into the new kernel, then rebuild DAHDI against your running
> >> kernel in order to load.  Sounds like you have built DAHDI against one
> >> version of the kernel and you're running against another one.
> >>
> >> Also...make sure you're using "modprobe" and not "insmod" to load the
> >> driver...so that crc_ccitt will automatically be loaded as a dependency.
> >>
> >> For example you can see it automatically loaded here (and how
> >> dahdi_dummy isn't needed for timing).
> >>
> >> ]# lsmod | grep crc_ccitt
> >> ]# dahdi_test -c 1
> >> Unable to open dahdi interface: No such file or directory
> >> ]# modprobe dahdi
> >> ]# lsmod | grep crc_ccitt
> >> crc_ccitt              10240  1 dahdi
> >> ]# dahdi_test -c 5
> >> Opened pseudo dahdi interface, measuring accuracy...
> >> 99.998% 99.981% 99.990% 99.990% 99.991%
> >> --- Results after 5 passes ---
> >> Best: 99.998 -- Worst: 99.981 -- Average: 99.990100, Difference: 99.990101
> >> ]#
> >
> > I did rebuild the kernel, it has the same version and the same config as
> > the old one and it did build a crc_ccitt module, and I even rebooted the
> > system with the new modules, but no joy at all.  Igot the same results
> > whether I rebuilt the kernel or not, so this is what is confusing to me.
> >
> 
> What you get from the following commands:
> 
> ]# lsmod | grep crc_ccitt
I had to modprobe it, but I got:
crc_ccitt               2080  0


> ]# modinfo crc_ccitt
filename:       /lib/modules/2.6.26-2-686/kernel/lib/crc-ccitt.ko
license:        GPL
description:    CRC-CCITT calculations
depends:
vermagic:       2.6.26-2-686 SMP mod_unload modversions 686

> ]# uname -a
Linux eirasterisk 2.6.26-2-686 #3 SMP Tue Jan 4 15:29:02 EST 2011 i686
GNU/Linux

> ]# cat /proc/kallsyms | grep crc_ccitt
00000000 a crc-ccitt.c  [crc_ccitt]
f8c6d284 ? __mod_license69      [crc_ccitt]
f8c6d290 ? __mod_description68  [crc_ccitt]
f8c72250 r __ksymtab_crc_ccitt  [crc_ccitt]
f8c72268 r __kstrtab_crc_ccitt  [crc_ccitt]
f8c72260 r __kcrctab_crc_ccitt  [crc_ccitt]
f8c72258 r __ksymtab_crc_ccitt_table    [crc_ccitt]
f8c72272 r __kstrtab_crc_ccitt_table    [crc_ccitt]
f8c72264 r __kcrctab_crc_ccitt_table    [crc_ccitt]
00000000 a crc-ccitt.mod.c      [crc_ccitt]
f8c6d2b4 ? __module_depends     [crc_ccitt]
f8c6d32c ? ____versions [crc_ccitt]
f8c6d2c0 ? __mod_vermagic5      [crc_ccitt]
f8c725e0 d __this_module        [crc_ccitt]
3771b461 a __crc_crc_ccitt      [crc_ccitt]
f8c72000 T crc_ccitt    [crc_ccitt]
75811312 a __crc_crc_ccitt_table        [crc_ccitt]
f8c72050 R crc_ccitt_table      [crc_ccitt]

> ]# modinfo dahdi
filename:       /lib/modules/2.6.26-2-686/dahdi/dahdi.ko
version:        SVN-trunk-r9614
alias:          dahdi_dummy
license:        GPL v2
description:    DAHDI Telephony Interface
author:         Mark Spencer <markster at digium.com>
srcversion:     A63E42F5ADDDE39777BCC24
depends:
vermagic:       2.6.26-2-686 SMP mod_unload modversions 686
parm:           debug:Sets debugging verbosity as a bitfield, to see
general debugging set this to 1. To see RBS debugging set this to 32
(int)
parm:           deftaps:int
parm:           max_pseudo_channels:Maximum number of pseudo
channels. (int)


-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici
         covici at ccs.covici.com