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Wireless connection fails out of nothing and can only be brought back
with airplane mode on/off. Connection is stable only for like 5 mins.
Several stacktraces in /var/log/syslog like below. Also lines line
"ieee80211 phy0: Hardware restart was requested" or "iwlwifi
0000:02:00.0: Firmware error during reconfiguration! Abort."

I get a suspicion that it may be related with VirtualBox, because it was
stable for some time until I startet a virtual machine.


Nov  3 23:14:52 lenovo kernel: [ 3360.233406] ------------[ cut here ]------------
Nov  3 23:14:52 lenovo kernel: [ 3360.233453] WARNING: CPU: 0 PID: 13409 at /build/buildd/linux-3.11.0/net/mac80211/util.c:1509 ieee80211_reconfig+0x1143/0x1400 [mac80211]()
Nov  3 23:14:52 lenovo kernel: [ 3360.233467] Modules linked in: pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) parport_pc(F) ppdev(F) rfcomm bnep binfmt_misc(F) nfsd(F) auth_rpcgss(F) nfs_acl(F) nfs(F) lockd(F) sunrpc(F) fscache(F) snd_hda_codec_realtek snd_hda_codec_hdmi x86_pkg_temp_thermal coretemp kvm_intel(F) kvm(F) crct10dif_pclmul(F) crc32_pclmul(F) ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) lrw(F) gf128mul(F) glue_helper(F) ablk_helper(F) cryptd(F) joydev(F) hid_multitouch arc4(F) uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev usbhid hid btusb iwlmvm bluetooth mac80211 iwlwifi microcode(F) snd_hda_intel cfg80211 snd_hda_codec snd_hwdep(F) snd_pcm(F) snd_page_alloc(F) psmouse(F) serio_raw(F) snd_seq_midi(F) snd_seq_midi_event(F) snd_rawmidi(F) snd_seq(F) i915 lpc_ich wmi drm_kms_helper snd_seq_device(F) snd_timer(F) mei_me drm snd(F) ideapad_laptop mei sparse_keymap i2c_algo_bit video(F) mac_hid soundcore(F) lp(F) parport(F) nls_iso8859_1(F) btrfs(F) xor(F) z
Nov  3 23:14:52 lenovo kernel: lib_deflate(F) raid6_pq(F) libcrc32c(F) ahci(F) libahci(F)
Nov  3 23:14:52 lenovo kernel: [ 3360.233684] CPU: 0 PID: 13409 Comm: kworker/0:0 Tainted: GF       W IO 3.11.0-12-generic #19-Ubuntu
Nov  3 23:14:52 lenovo kernel: [ 3360.233690] Hardware name: LENOVO 20268/Cherry 3A Touch, BIOS 7CCN26WW 09/06/2013
Nov  3 23:14:52 lenovo kernel: [ 3360.233717] Workqueue: events ieee80211_restart_work [mac80211]
Nov  3 23:14:52 lenovo kernel: [ 3360.233723]  0000000000000009 ffff880175e45d40 ffffffff816e547a 0000000000000000
Nov  3 23:14:52 lenovo kernel: [ 3360.233735]  ffff880175e45d78 ffffffff81061dbd ffff8801527a06c0 0000000000000000
Nov  3 23:14:52 lenovo kernel: [ 3360.233745]  ffff88024fff74b0 ffff88024fff6600 00000000fffffffb ffff880175e45d88
Nov  3 23:14:52 lenovo kernel: [ 3360.233756] Call Trace:
Nov  3 23:14:52 lenovo kernel: [ 3360.233768]  [<ffffffff816e547a>] dump_stack+0x45/0x56
Nov  3 23:14:52 lenovo kernel: [ 3360.233780]  [<ffffffff81061dbd>] warn_slowpath_common+0x7d/0xa0
Nov  3 23:14:52 lenovo kernel: [ 3360.233791]  [<ffffffff81061e9a>] warn_slowpath_null+0x1a/0x20
Nov  3 23:14:52 lenovo kernel: [ 3360.233827]  [<ffffffffa0489853>] ieee80211_reconfig+0x1143/0x1400 [mac80211]
Nov  3 23:14:52 lenovo kernel: [ 3360.233856]  [<ffffffffa045f1f7>] ieee80211_restart_work+0x87/0xa0 [mac80211]
Nov  3 23:14:52 lenovo kernel: [ 3360.233866]  [<ffffffff8107d05c>] process_one_work+0x17c/0x430
Nov  3 23:14:52 lenovo kernel: [ 3360.233875]  [<ffffffff8107dcac>] worker_thread+0x11c/0x3c0
Nov  3 23:14:52 lenovo kernel: [ 3360.233905]  [<ffffffff8107db90>] ? manage_workers.isra.24+0x2a0/0x2a0
Nov  3 23:14:52 lenovo kernel: [ 3360.233937]  [<ffffffff810847b0>] kthread+0xc0/0xd0
Nov  3 23:14:52 lenovo kernel: [ 3360.233969]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
Nov  3 23:14:52 lenovo kernel: [ 3360.233999]  [<ffffffff816f516c>] ret_from_fork+0x7c/0xb0
Nov  3 23:14:52 lenovo kernel: [ 3360.234030]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
Nov  3 23:14:52 lenovo kernel: [ 3360.234047] ---[ end trace 74d24ab452a883d1 ]---

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: wpasupplicant 1.0-3ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Sun Nov  3 23:03:07 2013
InstallationDate: Installed on 2013-10-27 (7 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
SourcePackage: wpa
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug saucy
-- 
IEEE 802.11 driver crash
https://bugs.launchpad.net/bugs/1247681
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