desktop-packages team mailing list archive

[Adrian Moreno <adrian_linux@xxxxxxx>]

I've also seen this issue. It seems that, when connecting to a wifi network, the entire system freezes (kernel panic?).
Here's some info:

$ lsb_release -r
Release:	15.04

$ lspci -kv| grep -A7 Wireless
07:00.0 Network controller: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter (rev 03)
	Subsystem: ASUSTeK Computer Inc. Device 855c
	Flags: bus master, fast devsel, latency 0, IRQ 19
	Memory at fb400000 (64-bit, non-prefetchable) [size=32K]
	Memory at fb200000 (64-bit, non-prefetchable) [size=2M]
	Capabilities: <access denied>
	Kernel driver in use: wl

$ uname -a
Linux 3.19.0-30-generic #34-Ubuntu SMP Fri Oct 2 22:08:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

This are the last lines of kernel.log before a crash:

Oct 15 17:38:10  kernel: [   16.981635] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 15 17:38:13  kernel: [   19.613794] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Oct 15 17:38:16  kernel: [   22.320113] cfg80211: Calling CRDA for country: AT
Oct 15 17:38:16  kernel: [   22.321710] cfg80211: Regulatory domain changed to country: AT
Oct 15 17:38:16  kernel: [   22.321712] cfg80211:  DFS Master region: ETSI
Oct 15 17:38:16  kernel: [   22.321713] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Oct 15 17:38:16  kernel: [   22.321715] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Oct 15 17:38:16  kernel: [   22.321716] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
Oct 15 17:38:16  kernel: [   22.321717] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
Oct 15 17:38:16  kernel: [   22.321718] cfg80211:   (5490000 KHz - 5710000 KHz @ 160000 KHz), (N/A, 2700 mBm), (0 s)
Oct 15 17:38:16  kernel: [   22.321719] cfg80211:   (57000000 KHz - 66000000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^  (a lo of these, you get the idea...) ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Oct 15 17:40:12  kernel: [    0.000000] Initializing cgroup subsys cpuset

I'm not an expert in debugging kernel problems but, so many "^@" doesn't
seem right.

Thanks for any help

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1479572

Title:
  system freezes when switching between wifis

Status in network-manager package in Ubuntu:
  Expired

Bug description:
  wifi works with the 15.04., still, it freezes the system quite a few times when I switch from one network to another
  very unstable

  laptop: lenovo yoga3 pro running u15.4
  the network card is
  01:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03)
   Subsystem: Lenovo Device [17aa:0623]
   Kernel driver in use: wlv

  please advice

  -----------------------------
  also,
  bluetooth seems to work as a tool, still,
  . it finds my envaya denon bluetooth speaker
  . but it can not connect to it
  same with my phone

  pleaase advice

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1479572/+subscriptions