How can I fix Wifi with my Broadcom BCM43142 card?

Question

I use Fedora 21 on my new Lenovo Yoga 2 11" laptop. I have a Broadcom BCM43142 wireless card:

01:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Lenovo Device [17aa:0611]
    Flags: fast devsel, IRQ 18
    Memory at b0400000 (64-bit, non-prefetchable) [size=32K]
    Capabilities: <access denied>
    Kernel modules: bcma, wl

And the only driver I've been able to get to work is wl. It won't work with the b43 driver.

I can connect to a network, but then the connection is either painfully, painfully slow, or hangs on connecting, or cuts out after a minute or so. Wifi works fine on Windows. How can I get this to work?

Answer 1

Since you have the wl driver properly installed, from the console try:

sudo rmmod -f ideapad_laptop

That may get things going. If not (or to blacklist the module across reboots), try:

echo "blacklist ideapad_laptop" >> /etc/modprobe.d/ideapad.conf

and reboot.

Apparently there may be conflicts with the ideapad_laptop module trying to manage the wlan at the same time as the wifi driver.

Answer 2

I'm wondering if this is the same as my bug, where it works for a bit and then goes very slow and you need to reset it:

Debian Jessie Wireless Driver Broadcom Restart (rmmod modprobe) BCM43142 [14e4:4365]