BCM4350 needs to be unloaded/loaded on suspend to not crash

[Carl-Erik Kopseng]

The driver for Broadcom BCM4350 works fine using the stock brcmfmac driver, except when going into suspend or hibernation. On resume it will crash and only a reboot seems to fix it.

After much chagrin and trying various driver packages (like the wl driver) without any success (lots of complaining about firmware, etc in dmesg), I managed to get the stock brcmfmac driver working perfectly by instructing the pm-* set of commands to unload and subsequently load it when doing any kind of power management.

Essentially, some package should execute
echo 'SUSPEND_MODULES="brcmfmac"' | sudo tee -a /etc/pm/config.d/config

for this to work for most Dell XPS machines.

Hardware info attached.

Expected: wifi driver to keep working after suspend or hibernation
Actual: brcmfmac driver crashes.

[Carl-Erik Kopseng (carlerik)]

All relevant info has been attached by using the utility script https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info.

I tried marking package as "I don't know", but somehow still ended up tagging the broadcom-sta package, which I think is wrong (different drivers). Not sure how to do anything about that, though.

I think the package should be the general linux-kernel, as I can find the driver source in /usr/src/linux-headers-4.15.0-13/drivers/net/wireless/broadcom/brcm80211/brcmfmac

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Cris (crism60)]

Hi. I have Ubuntu 20.04 running on a Macboook PRO 2016 (with touchbar). I'm experiencing the same issue, but unloading brcmfmac module before suspend did not help. I also tried reloading the module and NetworkManager when the laptop wakes up, but not helpful as well.

For making wifi work on my macbook I had to put this txt file inside /lib/firmware/brcm https://gist.github.com/cristianmiranda/ba9d64b4324f0803d9422d765de62252

I observed that after rebooting (which is the only fix so far) I can connect to 5G networks instantly, but after suspend/resume it tries to connect for a long time (if it gets to see them anyway) and fails.

Any progress on this issue?
Thanks!