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[Adwin <adwin.putteeraj@xxxxxxxxx>]

I have the same issue with kernel 4.6 (vanilla) & the all 6.3 versions of the bcmwl driver.
The 248 driver paired with the 4.4.8 ubuntu kernel seems to be working fine for now.

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https://bugs.launchpad.net/bugs/1528007

Title:
  bcmwl driver locks up system

Status in bcmwl package in Ubuntu:
  New

Bug description:
  Hardware:

  % lspci |grep -i BCM
  03:00.0 Network controller: Broadcom Corporation BCM4360 802.11ac Wireless Network Adapter (rev 03)

  % dmesg|grep BCM
  [    6.143332] Bluetooth: hci0: BCM: Read verbose config info failed (-16)
  [ 1676.017551] wlan0: Broadcom BCM43a0 802.11 Hybrid Wireless Controller 6.30.223.248 (r487574)

  I sometimes see weird lockup in the kernel:
   1778.501345] WARNING: CPU: 3 PID: 6455 at /build/linux-jHWiKd/linux-3.13.0/kernel/watchdog.c:24
  5 watchdog_overflow_callback+0x9c/0xd0()
  [ 1778.501347] Watchdog detected hard LOCKUP on cpu 3

  This happens with kernel 3.19 *and* kernel 4.2. Unloading the `wl`
  module makes the system more stable, so it's def. this module.

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