Red Hat Bugzilla – Bug 448436
Building the kernel from source creates another kernel than the precompiled one
Last modified: 2009-07-14 11:48:31 EDT
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Description of problem:
I own a Socket CF Bluetooth card in a PCMCIA adapter for my laptop. As discussed here:
this card requires a kernel patch to the serial drivers to work.
Well, my card didn't work with the precompiled kernel, I got exactly the symptoms as described on the web page (and I tried MANY times). So I got the patch from the Ubuntu forum and downloaded the Fedora kernel source rpm
But when I started to inspect the source code, it did indeed have the patch already installed. Then I compiled (without changing ANYTHING in the kernel source and the .config file) the kernel myself. And, presto! this kernel suddenly works with the card.
Could it be the case that the precompiled kernel is built from some other set of source code than the source rpm?
Version-Release number of selected component (if applicable):
Steps to Reproduce:
IBM Thinkpad 600X 450MHz Pentium III. Socket Bluetooth CF card Revision G.
Error message from trying "hciattach /dev/ttyS0 socket":
BCSP initialization timed out
I tried writing my own udev rules too, but it didn't solve the problem (which is kind of natural, since I couldn't make it work by hand)
Did you follow these directions to build the kernl?
Sorry about the late response.
No, I did not follow that document while building my own kernel. In fact, I just
_did_ follow the document step-by-step. And you were right, I ended up with
another kernel where my Bluetooth card didn't work, just as the precompiled one.
This is still puzzling, because I was able to compile my own kernel where the
Bluetooth card works. This is fully repeatable, every time I boot with the
kernel I built myself, the card works, every time I boot with the stock kernel
(or the one built from those instructions) it doesn't work.
I will try to recreate the exact steps that I followed to make a kernel that
works and I will report back with that information, because something is clearly
UPDATE: A new kernel was recently released (126.96.36.199-30.fc9.i686). This one has
the same problem regarding the Bluetooth card
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