Red Hat Bugzilla – Bug 727796
bcma to block wl, b43 and maybe bcrm43xx in kernel 2.6.40
Last modified: 2011-11-09 14:22:56 EST
Description of problem:
After kernel updates my wifi-adapter stops working. I've run lspci -k and see:
07:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g LP-PHY (rev 01)
Subsystem: Askey Computer Corp. Device 7175
Kernel driver in use: bcma
Kernel modules: bcma, wl
bcma - Broadcom's specific AMBA driver
This is a normal work of module bcma? I'm not sure what this a bug.
Also I'm read that a bcma module do block b43 too.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Update kernel with bcm wifi adapter
bcma loaded instead wl, b43
wl or b43 to load instead bcma
I've add bcma to blacklist of modules.
My wifi-adapter doesn't work with free and open-source modules, only with wl.
$ lspci -vnnn
07:00.0 Network controller : Broadcom Corporation BCM4313 802.11b/g LP-PHY [14e4:4727] (rev 01)
My main question - this is a bug or not?
Well, it is 'working as designed' -- it is just that the b43 driver in that kernel doesn't support your device. So it is a bit useless to let bcma claim the hardware.
I'll disable CONFIG_BCMA.
Thank you very much, John.
I've compiled brcm80211 as standalone kernel module, and bcma block it too.
I think it might be interesting or useful to you.
same thing on bcm43224 14e4:4353 (rev 01)
Discussed in the 2011-08-05 blocker review meeting. Rejected as NTH  for Fedora 16 alpha because impact is only one four particular broadcom wireless adapters that don't work our of the box in fedora anyway, can be worked around or fixed with a post-install kernel update.
kernel-3.0.1-3.fc16 has been submitted as an update for Fedora 16.
* should fix your issue,
* was pushed to the Fedora 16 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing kernel-3.0.1-3.fc16'
as soon as you are able to, then reboot.
Please go to the following url:
then log in and leave karma (feedback).
$ modinfo bcma
ERROR: modinfo: could not find module bcma
P.S. I've added karma.
in kernel 3.0 is supposed to b43 handle this kind of wireless card?
how about pushing 2.6.40 update for fedora 15 testing too
kernel-126.96.36.199-0.fc15 has been submitted as an update for Fedora 15.
kernel-188.8.131.52-0.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report.
please apply this same fix for f15
is working in kernel-184.108.40.206-0.fc15!
(In reply to comment #14)
> please apply this same fix for f15
It has been. See comment #13.
I had issues with a slightly different wireless version:
$ echo 'Kernel Version: ' `uname -r` && echo 'lspci Info:' && lspci -v | awk '/Ether|Net/,/^$/'
Kernel Version: 2.6.40-4.fc15.x86_64
03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
Subsystem: Dell Device 01f2
Flags: bus master, fast devsel, latency 64, IRQ 17
Memory at fe5fe000 (32-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: b44
Kernel modules: b44
0c:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
Subsystem: Dell Wireless 1395 WLAN Mini-Card
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at fe8fc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: wl
Kernel modules: wl, ssb
I am not sure if this is normal or not, but I had to install kmod-wl-2.6.40-4 for it to work with this kernel. Even so, this morning when I booted up, it didn't work again. After several reboots and trying the different kernel versions from the Grub menu it just started working again.
I thought yum had upgraded the kernel a couple of times up to the 2.6.38 kernel version without any problems. I don't remember having to go back to yum and install the kmod-wl version for the new kernel. Ever since version 2.6.40-4 and 220.127.116.11 it wouldn't work. Now, it works, but it seems hit or miss.
I tried to blacklist bcma, but that didn't help. I don't think I have that module installed.
kernel-3.0.1-3.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.
Can we have bcma enabled again please; I'd like to be able to use my bcm4331 in F16. People who want to use illegal modules can always blacklist the bcma module.
Alternatively, we could enable the brcm80211 driver in the kernel...
(In reply to comment #20)
> Alternatively, we could enable the brcm80211 driver in the kernel...
Yes, that sounds reasonable now. It has been promoted from staging to main recently so there is no any non-technical reasons to disable it.
However I 'm not sure whether b43 and brcm80211 have overlapping supported PCI IDs or not. This could be a problem then.
bcrm82011 doesn't support the BCM4331. Only b43 does.