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Old 12-22-2018, 11:55 AM   #1
Martin44
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Registered: Dec 2018
Posts: 2

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Debian: Broadcom BCM4356 802.11ac Wireless not working


Hi,

I fail to get my Broadcom Limited BCM4356 802.11ac Wireless Adapter running under debian-9 4.14.74-1 x86_64 on Lenovo Thinkpad L460
Code:
user@debian-9:~$ lspci -nn -d 14e4:
00:07.0 Network controller [0280]: Broadcom Limited BCM4356 802.11ac Wireless Network Adapter [14e4:43ec] (rev 02)
user@debian-9:~$ lspci -knn | grep Net -A2
00:07.0 Network controller [0280]: Broadcom Limited BCM4356 802.11ac Wireless Network Adapter [14e4:43ec] (rev 02)
Subsystem: Lenovo BCM4356 802.11ac Wireless Network Adapter [17aa:0777]
Kernel modules: brcmfmac
- debian package
Code:
firmware-brcm80211
is installed
- running
Code:
sudo modprobe brcmfmac
yields with
Code:
dmesg
Code:
[ 1100.171896] usbcore: deregistering interface driver brcmfmac
[ 2969.485185] usbcore: registered new interface driver brcmfmac
[ 2969.488809] brcmfmac: brcmf_chip_recognition: SB chip is not supported
[ 2969.488845] brcmfmac: brcmf_pcie_probe: failed 14e4:43ec
If I start on the same computer in dual boot Windows 10, the same wireless card works flawlessly. Hence, it is not a hardware problem, but somehow wrong/missing firmware. The device is not listed in the UI/Network Manager. So the core problem seems to be the
Code:
SB chip is not supported
. Is there anything I can install/do? Thanks for any hints!
 
Old 12-23-2018, 08:11 PM   #2
frankbell
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Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Ubuntu MATE, Mageia, and whatever VMs I happen to be playing with
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Broadcom's support of Linux has long been problematical, but most Broadcom chipsets can be made to work. I have gotten them to work on Dell's with, but have no experience getting them to work with Debian.

I found two articles that look like may be helpful:

https://wiki.debian.org/bcm43xx

https://wiki.archlinux.org/index.php...iver_selection

There's also and LQ stickly that I wrote after struggling with my Dell:
https://www.linuxquestions.org/quest...ux-4175434970/
 
Old 12-25-2018, 05:54 AM   #3
Martin44
LQ Newbie
 
Registered: Dec 2018
Posts: 2

Original Poster
Rep: Reputation: Disabled
Thank you @frankbell for your answer!
I've got it working now for those interested:

- debian 9 doesn't support per default Broadcom brcm4356
- having installed a new debian 9 on Lenovo L460 there is no folder
Code:
/lib/firmware/brcm
- DO NOT download firmware-brcm80211_20161130-4~deb8u1_all.deb (this one is buggy, that was my mistake that I've tried using it)
- Download firmware-brcm80211_20180825+dfsg-1_all.deb https://packages.debian.org/en/sid/a...80211/download
- Install it
Code:
sudo dpkg -i firmware-brcm80211_20180825+dfsg-1_all.deb
- Now you have:
Code:
brcmfmac4356-pci.bin
and
Code:
brcmfmac4356-sdio.bin
in
Code:
/lib/firmware/brcm
- Download the missing file
Code:
https://chromium.googlesource.com/chromiumos/third_party/linux-firmware/+/master/brcm/brcmfmac4356-pcie.txt
to
Code:
/lib/firmware/brcm
(I have no idea why they are not putting the text file into the debian package in the first place, because without it the kernel module cannot be loaded/used.)
- Unload kernel module
Code:
sudo modprobe -r brcmfmac
- Load kernel module
Code:
sudo modprobe brcmfmac
- Check with
Code:
sudo dmesg | less
that loading the module has been successful
=> after this, I got the Wifi in the Network Manager and now I am able to use the Wifi if I install debian-9 directly on the machine. Unfortunately, I am using Qubes and there I don't get it working, but for that I will try to contact people in the qubes forum.
 
  


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