------------[ cut here ]------------ WARNING: at /build/buildd/linux-2.6.35/net/mac80211/tx.c:651 ieee80211_tx_h_rate_ctrl+0x460/0x4e0 [mac80211]() Hardware name: Studio XPS 1340 wlan0: Dropped data frame as no usable bitrate found while scanning and associated. Target station: 00:24:c9:42:79:f0 on 5 GHz band Modules linked in: cryptd aes_x86_64 aes_generic parport_pc ppdev dm_crypt snd_hda_codec_nvhdmi snd_hda_codec_idt binfmt_misc kvm_intel kvm snd_hda_intel snd_hda_codec arc4 snd_hwdep joydev snd_pcm ath9k ath9k_common snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device ath9k_hw snd ath r852 mac80211 soundcore nvidia(P) sm_common snd_page_alloc nand nand_ids lp psmouse serio_raw uvcvideo nand_ecc shpchp videodev v4l1_compat i2c_nforce2 v4l2_compat_ioctl32 dell_laptop dell_wmi mtd cfg80211 parport dcdbas video output firewire_ohci ahci libahci sdhci_pci sdhci led_class firewire_core crc_itu_t forcedeth Pid: 868, comm: phy0 Tainted: P 2.6.35-21-generic #31-Ubuntu Call Trace: [] warn_slowpath_common+0x7f/0xc0 [] warn_slowpath_fmt+0x46/0x50 [] ? default_spin_lock_flags+0x9/0x10 [] ieee80211_tx_h_rate_ctrl+0x460/0x4e0 [mac80211] [] invoke_tx_handlers+0x378/0x4b0 [mac80211] [] ieee80211_tx+0x85/0x250 [mac80211] [] ? skb_release_data+0xd0/0xe0 [] ? pskb_expand_head+0x154/0x1f0 [] ieee80211_xmit+0xb0/0x1c0 [mac80211] [] ieee80211_tx_skb+0x54/0x70 [mac80211] [] ieee80211_send_nullfunc+0x4b/0x70 [mac80211] [] ieee80211_dynamic_ps_enable_work+0xad/0xb0 [mac80211] [] ? ieee80211_dynamic_ps_enable_work+0x0/0xb0 [mac80211] [] run_workqueue+0xc5/0x1a0 [] worker_thread+0xa3/0x110 [] ? autoremove_wake_function+0x0/0x40 [] ? worker_thread+0x0/0x110 [] kthread+0x96/0xa0 [] kernel_thread_helper+0x4/0x10 [] ? kthread+0x0/0xa0 [] ? kernel_thread_helper+0x0/0x10 ---[ end trace 1cff9643c653e55f ]---