Just applied the latest patch and the Broadcom 802.11 wifi on my Dell latitude is broken again.

[Doug Forguson]

uname -r 5.4.0-94-lowlatency

lsb_release -rd
Description: Ubuntu 20.04.3 LTS
Release: 20.04

Booting under previous kernel (5.4.0-92-lowlatency) does not resolve the issue.

lspci -vnn | grep Network
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection (Lewisville) [8086:1502] (rev 04)
 Subsystem: Dell 82579LM Gigabit Network Connection (Lewisville) [1028:0534]
02:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43228 802.11a/b/g/n [14e4:4359]

ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether f0:1f:af:34:68:4c brd ff:ff:ff:ff:ff:ff
3: wlp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state DORMANT mode DORMANT group default qlen 1000
    link/ether 70:18:8b:14:bc:e5 brd ff:ff:ff:ff:ff:ff

sudo lshw -class network
  *-network
       description: Ethernet interface
       product: 82579LM Gigabit Network Connection (Lewisville)
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: eno1
       version: 04
       serial: f0:1f:af:34:68:4c
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.13-3 ip=192.168.0.102 latency=0 link=yes multicast=yes port=twisted pair speed=10Mbit/s
       resources: irq:27 memory:f7e00000-f7e1ffff memory:f7e39000-f7e39fff ioport:f080(size=32)
  *-network
       description: Wireless interface
       product: BCM43228 802.11a/b/g/n
       vendor: Broadcom Inc. and subsidiaries
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlp2s0
       version: 00
       serial: 70:18:8b:14:bc:e5
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11
       resources: irq:17 memory:f7d00000-f7d03fff

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1958182

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Doug Forguson (doug-x)]

Hi Chris,

I guess I got the module name wrong. At any rate my broadcom wifi is
broken after the last patch. This is about the tenth time this has
happened. I think I'm going to switch to a different distro until this
gets resolved.

Thanks,

Doug

doug@doug-Latitude-E6430:~$ apport-collect 1958182
The authorization page:
  (https://launchpad.net/+authorize-token?oauth_token=2MGZFGmw1h7rXRBvjstb&allow_permission=DESKTOP_INTEGRATION)
should be opening in your browser. Use your browser to authorize
this program to access Launchpad on your behalf.
Waiting to hear from Launchpad about your decision...
Package bcmwl not installed and no hook available, ignoring

On 1/17/22 19:05, Chris Guiver wrote:
> apport-collect 1958182

[Doug Forguson (doug-x)]

Hi Chris,

Not sure I understand how this worked but I ran the below command after
doing a bit of research and after rebooting the wifi started working again.

"sudo modprobe cfg80211"

A quick search showed this on the system:

doug@doug-Latitude-E6430:~$ ls -l
/lib/modules/5.4.0-96-lowlatency/kernel/net/wireless/cfg80211.ko
-rw-r--r-- 1 root root 1222521 Jan 12 09:16
/lib/modules/5.4.0-96-lowlatency/kernel/net/wireless/cfg80211.ko

I think this aligns pretty well with the date of the patch that broke
the wifi. Maybe the patch just failed to update the kernel with the new
driver module.

Doug

On 1/22/22 16:41, Doug Forguson wrote:
> Hi Chris,
>
> I guess I got the module name wrong. At any rate my broadcom wifi is
> broken after the last patch. This is about the tenth time this has
> happened. I think I'm going to switch to a different distro until this
> gets resolved.
>
> Thanks,
>
> Doug
>
>
> doug@doug-Latitude-E6430:~$ apport-collect 1958182
> The authorization page:
>  (https://launchpad.net/+authorize-token?oauth_token=2MGZFGmw1h7rXRBvjstb&allow_permission=DESKTOP_INTEGRATION)
>
> should be opening in your browser. Use your browser to authorize
> this program to access Launchpad on your behalf.
> Waiting to hear from Launchpad about your decision...
> Package bcmwl not installed and no hook available, ignoring
>
> On 1/17/22 19:05, Chris Guiver wrote:
>> apport-collect 1958182