No meu computador com uma placa mãe "ASUS X99-PRO", tenho um sistema semi-aleatório pendurado cerca de 25% do tempo quando altero a rede sem fio. O adaptador é:
> lspci | grep -i wireless
05:00.0 Network controller: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter (rev 03)
O sistema não fornece nenhum feedback que eu possa ver, tanto o mouse quanto o teclado não respondem e a única maneira é fazer uma reinicialização do hardware. No começo eu pensei que isso era algo relacionado à interface do usuário, uma vez que se tornou não-responsivo e eu usei o alternativa de terminal :
nmcli c up id <WiFiConn>
Estou executando o Ubuntu 14.04 com tudo atualizado. Abaixo está o meu sys-log antes do travamento do sistema:
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> (wlan0): DHCPv4 state changed nbi -> preinit
Dec 14 12:32:41 mycomputer dhclient: Listening on LPF/wlan0/6c:71:d9:f2:d1:a7
Dec 14 12:32:41 mycomputer dhclient: Sending on LPF/wlan0/6c:71:d9:f2:d1:a7
Dec 14 12:32:41 mycomputer dhclient: Sending on Socket/fallback
Dec 14 12:32:41 mycomputer dhclient: DHCPREQUEST of 1##.###.###.### on wlan0 to 255.255.255.255 port 67 (xid=0x6f19a123)
Dec 14 12:32:41 mycomputer dhclient: DHCPACK of 1##.###.###.### from 1.1.1.1
Dec 14 12:32:41 mycomputer dhclient: bound to 1##.###.###.### -- renewal in 861 seconds.
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> (wlan0): DHCPv4 state changed preinit -> reboot
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> address 1##.###.###.###
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> prefix 21 (255.255.248.0)
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> gateway 1a#.###.###.###
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> nameserver '1b#.###.###.###'
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> nameserver '1c#.###.###.###'
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> domain name 'net.provider.se'
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Dec 14 12:32:41 mycomputer NetworkManager[1042]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) started...
Dec 14 12:32:41 mycomputer avahi-daemon[658]: Joining mDNS multicast group on interface wlan0.IPv4 with address 1##.###.###.###.
Dec 14 12:32:41 mycomputer avahi-daemon[658]: New relevant interface wlan0.IPv4 for mDNS.
Dec 14 12:32:41 mycomputer avahi-daemon[658]: Registering new address record for 1##.###.###.### on wlan0.IPv4.
Dec 14 12:32:42 mycomputer NetworkManager[1042]: <info> (wlan0): device state change: ip-config -> secondaries (reason 'none') [70 90 0]
Dec 14 12:32:42 mycomputer NetworkManager[1042]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) complete.
Dec 14 12:32:42 mycomputer NetworkManager[1042]: <info> (wlan0): device state change: secondaries -> activated (reason 'none') [90 100 0]
Dec 14 12:32:42 mycomputer NetworkManager[1042]: <info> NetworkManager state is now CONNECTED_GLOBAL
Dec 14 12:32:42 mycomputer NetworkManager[1042]: <info> Policy set 'DS Guest' (wlan0) as default for IPv4 routing and DNS.
Dec 14 12:32:42 mycomputer NetworkManager[1042]: <info> Writing DNS information to /sbin/resolvconf
Dec 14 12:32:42 mycomputer dnsmasq[2649]: setting upstream servers from DBus
Dec 14 12:32:42 mycomputer dnsmasq[2649]: using nameserver 1c#.###.###.####53
Dec 14 12:32:42 mycomputer dnsmasq[2649]: using nameserver 1b#.###.###.####53
Dec 14 12:32:42 mycomputer avahi-daemon[658]: Joining mDNS multicast group on interface wlan0.IPv6 with address ####::####:####:####:####.
Dec 14 12:32:42 mycomputer avahi-daemon[658]: New relevant interface wlan0.IPv6 for mDNS.
Dec 14 12:32:42 mycomputer avahi-daemon[658]: Registering new address record for ####::####:####:####:#### on wlan0.*.
Dec 14 12:32:42 mycomputer whoopsie[1365]: message repeated 5 times: [ offline]
Dec 14 12:32:45 mycomputer whoopsie[1365]: Could not get the list of active connections: Timeout was reached
Dec 14 12:32:45 mycomputer whoopsie[1365]: offline
Dec 14 12:32:50 mycomputer NetworkManager[1042]: <info> (wlan0): roamed from BSSID ##:##:##:##:##:## (DS Guest) to DC:EB:94:97:78:F1 (DS Guest)
Dec 14 12:32:50 mycomputer NetworkManager[1042]: <info> Activation (wlan0) successful, device activated.
Dec 14 12:32:50 mycomputer dbus[609]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Dec 14 12:32:50 mycomputer dbus[609]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Dec 14 12:32:55 mycomputer sudo: pam_ecryptfs: pam_sm_authenticate: /home/max is already mounted
Dec 14 12:32:57 mycomputer ntpdate[6385]: adjust time server 1d#.###.###.### offset -0.062355 sec
Dec 14 12:32:57 mycomputer wpa_supplicant[2637]: wlan0: CTRL-EVENT-SCAN-STARTED
Dec 14 12:33:01 mycomputer NetworkManager[1042]: <info> (wlan0): IP6 addrconf timed out or failed.
Dec 14 12:33:01 mycomputer NetworkManager[1042]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Dec 14 12:33:01 mycomputer NetworkManager[1042]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Dec 14 12:33:01 mycomputer NetworkManager[1042]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Dec 14 12:33:17 mycomputer dbus[609]: [system] Activating service name='org.debian.apt' (using servicehelper)
Dec 14 12:33:17 mycomputer AptDaemon: INFO: Initializing daemon
Dec 14 12:33:17 mycomputer dbus[609]: [system] Successfully activated service 'org.debian.apt'
Dec 14 12:33:17 mycomputer AptDaemon.PackageKit: INFO: Initializing PackageKit compat layer
A saída do dmesg (a parte sem fio que parece relacionada):
[ 1180.647123] WARNING: CPU: 10 PID: 5043 at /build/linux-lts-vivid-3x86XO/linux-lts-vivid-3.19.0/net/wireless/sme.c:664 __cfg80211_connect_result+0x3bb/0x400 [cfg80211]()
[ 1180.647125] Modules linked in: snd_hda_codec_hdmi dm_crypt eeepc_wmi nvidia(POE) asus_wmi sparse_keymap video mxm_wmi wl(POE) intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_realtek snd_hda_codec_generic btusb kvm dm_multipath scsi_dh crct10dif_pclmul crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_hda_controller aesni_intel snd_hda_codec aes_x86_64 lrw snd_hwdep snd_seq_midi gf128mul glue_helper snd_seq_midi_event ablk_helper cryptd snd_rawmidi serio_raw cfg80211 snd_pcm snd_seq lpc_ich snd_seq_device snd_timer sb_edac edac_core snd drm soundcore mei_me mei shpchp 8250_fintek wmi tpm_infineon bnep rfcomm bluetooth binfmt_misc mac_hid parport_pc ppdev lp parport raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log hid_generic usbhid hid uas usb_storage psmouse e1000e ahci libahci ptp pps_core
[ 1180.647200] CPU: 10 PID: 5043 Comm: kworker/u24:2 Tainted: P W OE 3.19.0-28-generic #30~14.04.1-Ubuntu
[ 1180.647203] Hardware name: Exertis_CapTech All Series/X99-PRO, BIOS 1901 08/10/2015
[ 1180.647214] Workqueue: cfg80211 cfg80211_event_work [cfg80211]
[ 1180.647216] ffffffffc076f4f8 ffff880f7c447c68 ffffffff817aed97 0000000000000000
[ 1180.647220] 0000000000000000 ffff880f7c447ca8 ffffffff81074d8a ffff8810371c6478
[ 1180.647223] 0000000000000000 0000000000000000 ffff881033809818 ffff8810371c6400
[ 1180.647227] Call Trace:
[ 1180.647239] [<ffffffff817aed97>] dump_stack+0x45/0x57
[ 1180.647245] [<ffffffff81074d8a>] warn_slowpath_common+0x8a/0xc0
[ 1180.647248] [<ffffffff81074e7a>] warn_slowpath_null+0x1a/0x20
[ 1180.647264] [<ffffffffc074cadb>] __cfg80211_connect_result+0x3bb/0x400 [cfg80211]
[ 1180.647278] [<ffffffffc0728073>] cfg80211_process_wdev_events+0x153/0x1d0 [cfg80211]
[ 1180.647291] [<ffffffffc0728128>] cfg80211_process_rdev_events+0x38/0x70 [cfg80211]
[ 1180.647301] [<ffffffffc0723022>] cfg80211_event_work+0x22/0x30 [cfg80211]
[ 1180.647306] [<ffffffff8108db6f>] process_one_work+0x14f/0x400
[ 1180.647309] [<ffffffff8108e308>] worker_thread+0x118/0x510
[ 1180.647313] [<ffffffff8108e1f0>] ? rescuer_thread+0x3d0/0x3d0
[ 1180.647317] [<ffffffff81093802>] kthread+0xd2/0xf0
[ 1180.647321] [<ffffffff81093730>] ? kthread_create_on_node+0x1c0/0x1c0
[ 1180.647326] [<ffffffff817b6698>] ret_from_fork+0x58/0x90
[ 1180.647330] [<ffffffff81093730>] ? kthread_create_on_node+0x1c0/0x1c0