Re: [Bluez-users] rfcomm broken in RHEL-WS-3 kernel 2.4.21

[Marcel Holtmann <marcel@holtmann.org>]

Hi Billy,

> I've installed the bluez RPMs that I saw on rpmfind for Red Hat
> Enterprise 3, which are bluez-libs-2.10-1.1.el3.rf.i386.rpm,
> bluez-utils-2.9-1.1.fc3.rf.i386.rpm and
> bluez-bluefw-1.0-1.rhel3.dag.i386.rpm.  These did not enable
> rfcomm nor install /dev/rfcomm*.  The rfcomm executable always
> reports, "Can't open RFCOMM control socket: Address family not
> supported by protocol."

this basically means that the RFCOMM kernel module is not loaded. You
might wanna check with lsmod.

> I then tried installing bluez-libs and bluez-utils from their
> tarballs.  This changed nothing; /dev/rfcomm* still isn't there
> and I still get the same error from the rfcomm executable.

For a 2.4 kernel, you need to create the /dev/rfcommX device nodes by
yourself.

> My machine is RHEL-WS-3, kernel 2.4.21-32.0.1.ELsmp.  I use
> whatever kernel rpm up2date gives and I don't compile kernels
> myself anymore.
> 
> I got pretty much identical results from a second machine which
> also runs Red Hat Enterprise Workstation 3 and kernel 2.4.15.

The 2.4.15 was never supported by RHEL3 and also doesn't include support
for the RFCOMM kernel module at all.

> There were a few clues on this list's archives and elsewhere
> that I should add these lines to /etc/modules.conf:
> 
> alias net-pf-31 bluez
> alias bt-proto-0 l2cap
> alias bt-proto-2 sco
> alias bt-proto-3 rfcomm
> 
> Adding these didn't change anything.  Also, modprobe rfcomm
> reports, "Can't locate module rfcomm".
> 
> So what should I do about the broken rfcomm?  I hope to use a
> USB bluetooth dongle to send faxes through my cellphone.

The RHEL3 kernel config shows me that a RFCOMM module should be there,
but I haven't check an actual RHEL3 installation right now. Take a look
at your /lib/modules directory.

Regards

Marcel



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