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
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https://bugs.launchpad.net/bugs/1479572
Title:
system freezes when switching between wifis
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