I can confirm this bug. WPA networks appear to be extremely unstable in Ubuntu Intrepid.


Apr 23 21:47:58 frogstar kernel: [98886.677063] ------------[ cut here ]------------
Apr 23 21:47:58 frogstar kernel: [98886.677071] WARNING: at /build/buildd/linux-2.6.27/include/../net/mac80211/rate.h:152 rs_get_rate+0xaf/0x4b
0 [iwl3945]()
Apr 23 21:47:58 frogstar kernel: [98886.677079] Modules linked in: aes_i586 aes_generic af_packet i915 drm binfmt_misc openafs(P) rfcomm bridge
 stp bnep sco l2cap bluetooth ipv6 ppdev acpi_cpufreq cpufreq_stats cpufreq_conservative cpufreq_powersave cpufreq_ondemand freq_table cpufreq_
userspace wmi sbs sbshc pci_slot iptable_filter ip_tables x_tables ext2 sbp2 parport_pc lp parport joydev pcmcia serio_raw evdev snd_hda_intel
psmouse snd_pcm_oss snd_mixer_oss arc4 ecb crypto_blkcipher snd_pcm pcspkr iwl3945 sdhci_pci rfkill snd_seq_dummy container sdhci mac80211 mmc_
core video output yenta_socket rsrc_nonstatic tifm_7xx1 led_class snd_seq_oss pcmcia_core tifm_core snd_seq_midi snd_rawmidi cfg80211 snd_seq_m
idi_event snd_seq iTCO_wdt iTCO_vendor_support ac battery button snd_timer snd_seq_device snd intel_agp agpgart shpchp pci_hotplug soundcore sn
d_page_alloc ext3 jbd mbcache sd_mod sr_mod crc_t10dif cdrom sg ata_generic pata_acpi ata_piix e100 libata mii ohci1394 scsi_mod dock ieee1394
ehci_hcd uhci_hcd usbcore t
Apr 23 21:47:58 frogstar kernel: ermal processor fan fbcon tileblit font bitblit softcursor fuse
Apr 23 21:47:58 frogstar kernel: [98886.677326] Pid: 2830, comm: iwl3945 Tainted: P        W 2.6.27-11-generic #1
Apr 23 21:47:58 frogstar kernel: [98886.677334]  [<c037d4fb>] ? printk+0x1d/0x22
Apr 23 21:47:58 frogstar kernel: [98886.677349]  [<c0131ee9>] warn_on_slowpath+0x59/0x90
Apr 23 21:47:58 frogstar kernel: [98886.677374]  [<c012a037>] ? load_balance_newidle+0x97/0x270
Apr 23 21:47:58 frogstar kernel: [98886.677387]  [<c0102df6>] ? __switch_to+0xa6/0x160
Apr 23 21:47:58 frogstar kernel: [98886.677398]  [<c012852b>] ? finish_task_switch+0x2b/0xe0
Apr 23 21:47:58 frogstar kernel: [98886.677409]  [<c037da89>] ? schedule+0x429/0x790
Apr 23 21:47:58 frogstar kernel: [98886.677422]  [<c037f09e>] ? account_scheduler_latency+0xe/0x220
Apr 23 21:47:58 frogstar kernel: [98886.677433]  [<c02534e1>] ? number+0x291/0x2a0
Apr 23 21:47:58 frogstar kernel: [98886.677448]  [<c01234b4>] ? __enqueue_entity+0xd4/0x100
Apr 23 21:47:58 frogstar kernel: [98886.677464]  [<f8bed29b>] ? sta_info_get+0xb/0x60 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677502]  [<f8c2cd7f>] rs_get_rate+0xaf/0x4b0 [iwl3945]
Apr 23 21:47:58 frogstar kernel: [98886.677522]  [<c0124b1a>] ? enqueue_entity+0xda/0x2f0
Apr 23 21:47:58 frogstar kernel: [98886.677533]  [<c014e78b>] ? getnstimeofday+0x4b/0x100
Apr 23 21:47:58 frogstar kernel: [98886.677545]  [<c01135f5>] ? apic_wait_icr_idle+0x15/0x40
Apr 23 21:47:58 frogstar kernel: [98886.677561]  [<f8bed29b>] ? sta_info_get+0xb/0x60 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677607]  [<f8bf7aa1>] rate_control_get_rate+0x71/0x130 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677643]  [<f8bfe897>] invoke_tx_handlers+0x467/0x630 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677680]  [<f8bfee6d>] ieee80211_tx+0x7d/0x1b0 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677710]  [<c02ec3d9>] ? pskb_expand_head+0xe9/0x150
Apr 23 21:47:58 frogstar kernel: [98886.677732]  [<f8bff0e4>] ieee80211_master_start_xmit+0x144/0x210 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677764]  [<c02f44db>] dev_hard_start_xmit+0x16b/0x1c0
Apr 23 21:47:58 frogstar kernel: [98886.677776]  [<c03068f5>] __qdisc_run+0x1b5/0x200
Apr 23 21:47:58 frogstar kernel: [98886.677787]  [<c02f6417>] dev_queue_xmit+0x2e7/0x3f0
Apr 23 21:47:58 frogstar kernel: [98886.677796]  [<c02ec832>] ? __alloc_skb+0x52/0x110
Apr 23 21:47:58 frogstar kernel: [98886.677817]  [<f8bf0b34>] ieee80211_sta_tx+0x74/0x90 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677852]  [<f8bf134f>] ieee80211_send_auth+0x11f/0x150 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677885]  [<f8bf67e0>] ieee80211_sta_work+0x2e0/0x380 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677919]  [<f8bf6500>] ? ieee80211_sta_work+0x0/0x380 [mac80211]
Apr 23 21:47:58 frogstar kernel: [98886.677951]  [<c0143765>] run_workqueue+0x95/0x160
Apr 23 21:47:58 frogstar kernel: [98886.677965]  [<c0147696>] ? finish_wait+0x16/0x70
Apr 23 21:47:58 frogstar kernel: [98886.677975]  [<c0143a08>] worker_thread+0x88/0xf0
Apr 23 21:47:58 frogstar kernel: [98886.677984]  [<c01475d0>] ? autoremove_wake_function+0x0/0x50
Apr 23 21:47:58 frogstar kernel: [98886.677997]  [<c0143980>] ? worker_thread+0x0/0xf0
Apr 23 21:47:58 frogstar kernel: [98886.678008]  [<c0147261>] kthread+0x41/0x80
Apr 23 21:47:58 frogstar kernel: [98886.678018]  [<c0147220>] ? kthread+0x0/0x80
Apr 23 21:47:58 frogstar kernel: [98886.678029]  [<c0105297>] kernel_thread_helper+0x7/0x10
Apr 23 21:47:58 frogstar kernel: [98886.678039]  =======================
Apr 23 21:47:58 frogstar kernel: [98886.678045] ---[ end trace 221cb2b2b9a75721 ]---