Broadcom wifi installation problem.

Hi everyone!
I have problems with setting up my wifi card during Arch installation (I'm an Arch newbie, so please be understanding ;-) ). The thing is, that wifi is only way for me to connect to Internet. I read the Unofficial Beginners Guide, moved to Wireless Setup and then Broadcom wireless. I identified my card as 4727, so the driver should be brcm80211 and wiki says "The brcm80211 driver is included in the kernel since 2.6.37. No further action is necessary on the part of the user". Nice but ifconfig shows no wlan0 (nor eth0 for that matter...) and I'm stuck. Any suggestions and ideas are highly appreciated.

Maybe the Guide needs a little attention.
The driver is in the kernel, but the firmware that is uploaded by the kernel to the Broadcom Chip that runs the chip is not.
You will need to install b43-firmware from the AUR. That will depend on b43-fwcutter-git, also in the AUR.
You can verify this need by looking at the output dmesg. It should look like this:
ewaller@odin:~ 1005 %dmesg | grep firmware
[ 18.963508] b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
ewaller@odin:~ 1006 %
Yours will probably indicate that the firmware is missing
Last edited by ewaller (2011-06-25 17:42:26)

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[Solved?] more Broadcom wireless b43 problems?

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Last edited by innsmouthrain (2013-04-18 13:24:16)

Hi,
I just went through a very similar problem and thought I should post here.
I went through a fresh install of Arch using a USB wireless dongle using carl firmware. For some reason (can't remember why) I manually copied carl firmware from my previous install to make it work.
Anyway, after installing I wanted to start using my built in Broadcom card (4311 by the way) so installed b43-firmware from AUR. Installation finished without errors.
I 'ip link' and see nothing new. I then
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so I check whether the files exist and they do. I check permissions and see the same as innsmouthrain. I check
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and it returns nothing. Try to reinstall b43-firmware package and see the same '.. exists on filesystem' errors. I then completely removed the b43 folder in /usr/lib/firmware/, removed and installed b43-firmware again. Again checked with
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Reboot then
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[ 75.213447] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
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followed by
ip link set wlan0 up
wifi-menu
It tells me also
:: Scanning for networks
> No networks found [FAILED]
I try again immediately afterwards and it succeeds.
So that is my story. I didn't need to blacklist bcma by the way. I tried once using both 'blacklist' and 'install' but failed due to b43 being unable to load. According to the wiki
Since kernel 3.3, the brcmsmac module actually uses bcma, so bcma needs to be unblacklisted or the Wi-Fi interface will not appear.
so I stopped pursuing that route after reading that.
I don't know why the files did initially not belong to b43-firmware and why they were not being found. There's a slight chance that I copied by old b43 files manually during installation as well ( I can't remember but it's a very slim chance), tough I think I would have seen errors during first install of b43-firmware then.

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