Recently I installed ubuntu 13.10 on my new Lenovo U430 Touch alongside windows 8.1

Now wifi keeps dropping every few mins, I disable and enable wifi and then it works again, but dropped after a few mins again.

I checked many forums and none of the suggestions seem to work. This problem does not happen on win 8 though.

Here is the output of

sudo lspci -nnk | grep -B4 Network

    Subsystem: Lenovo Device [17aa:3978]

01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)

    Subsystem: Lenovo Device [17aa:3801]

    Kernel driver in use: r8169

02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 73)

and the output of

 dmesg | tail -n 50 

as soon as the wifi stopped

[ 6493.935237] WARNING: CPU: 0 PID: 6423 at /build/buildd/linux-3.11.0/net/mac80211/util.c:1538 ieee80211_reconfig+0x1234/0x13f0 [mac80211]()

[ 6493.935240] Modules linked in: hid_generic hid_multitouch uvcvideo videobuf2_vmalloc videobuf2_memops usbhid videobuf2_core videodev hid btusb parport_pc(F) ppdev(F) bnep rfcomm bluetooth snd_hda_codec_hdmi snd_hda_codec_realtek joydev(F) arc4(F) x86_pkg_temp_thermal coretemp kvm(F) nls_iso8859_1(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) iwlmvm mac80211 snd_hda_intel iwlwifi snd_hda_codec snd_hwdep(F) snd_pcm(F) cfg80211 snd_page_alloc(F) i915 snd_seq_midi(F) microcode(F) snd_seq_midi_event(F) psmouse(F) snd_rawmidi(F) snd_seq(F) serio_raw(F) snd_seq_device(F) drm_kms_helper wmi snd_timer(F) drm ideapad_laptop sparse_keymap snd(F) lpc_ich i2c_algo_bit mei_me mei soundcore(F) video(F) intel_smartconnect mac_hid lp(F) parport(F) ext2(F) ahci(F) libahci(F) r8169 mii(F)

[ 6493.935362] CPU: 0 PID: 6423 Comm: kworker/0:4 Tainted: GF       W    3.11.0-13-generic #20-Ubuntu

[ 6493.935365] Hardware name: LENOVO 20270/Cherry 4A Touch, BIOS 7CCN32WW 09/04/2013

[ 6493.935380] Workqueue: events ieee80211_restart_work [mac80211]

[ 6493.935382]  0000000000000009 ffff880008e69d40 ffffffff816e54ba 0000000000000000

[ 6493.935401]  ffff880008e69d78 ffffffff81061dbd ffff880158b8e800 0000000000000003

[ 6493.935407]  00000000ffffffea ffff880157498600 0000000000000004 ffff880008e69d88

[ 6493.935413] Call Trace:

[ 6493.935419]  [] dump_stack+0x45/0x56

[ 6493.935427]  [] warn_slowpath_common+0x7d/0xa0

[ 6493.935454]  [] warn_slowpath_null+0x1a/0x20

[ 6493.935474]  [] ieee80211_reconfig+0x1234/0x13f0 [mac80211]

[ 6493.935492]  [] ieee80211_restart_work+0x87/0xa0 [mac80211]

[ 6493.935509]  [] process_one_work+0x17c/0x430

[ 6493.935514]  [] worker_thread+0x11c/0x3c0

[ 6493.935520]  [] ? manage_workers.isra.24+0x2a0/0x2a0

[ 6493.935528]  [] kthread+0xc0/0xd0

[ 6493.935549]  [] ? kthread_create_on_node+0x120/0x120

[ 6493.935554]  [] ret_from_fork+0x7c/0xb0

[ 6493.935561]  [] ? kthread_create_on_node+0x120/0x120

Appreciate help in resolving it.

PS. I am a new user for ubuntu and have added the details I seem to think might help identify the problem.