Comment 9 for bug 522545

I've the same problem, but I can't enable wifi:

$ uname -a
Linux xxxx 2.6.32-19-generic #28-Ubuntu SMP Thu Apr 1 10:39:41 UTC 2010 x86_64 GNU/Linux
$ cat /proc/version_signature
Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1

now hitting fn-f2 to enable wireless, then
$ sudo dmesg -c
[ 1967.605092] iwlagn 0000:05:00.0: RF_KILL bit toggled to enable radio.
[ 1967.618496] BUG: scheduling while atomic: swapper/0/0x10010000
[ 1967.618504] Modules linked in: binfmt_misc ppdev kvm_intel kvm snd_hda_codec_atihdmi snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_usb_audio snd_pcm_oss snd_usb_lib snd_mixer_oss snd_hwdep snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi arc4 snd_rawmidi snd_seq_midi_event snd_seq fbcon tileblit font snd_timer iwlagn bitblit snd_seq_device fglrx(P) snd softcursor vga16fb vgastate iwlcore mac80211 dell_wmi sdhci_pci sdhci led_class uvcvideo videodev soundcore snd_page_alloc cfg80211 compat_firmware_class joydev dell_laptop video dcdbas v4l1_compat output lp parport usbhid hid v4l2_compat_ioctl32 psmouse serio_raw ahci r8169 mii
[ 1967.618667] CPU 4:
[ 1967.618672] Modules linked in: binfmt_misc ppdev kvm_intel kvm snd_hda_codec_atihdmi snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_usb_audio snd_pcm_oss snd_usb_lib snd_mixer_oss snd_hwdep snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi arc4 snd_rawmidi snd_seq_midi_event snd_seq fbcon tileblit font snd_timer iwlagn bitblit snd_seq_device fglrx(P) snd softcursor vga16fb vgastate iwlcore mac80211 dell_wmi sdhci_pci sdhci led_class uvcvideo videodev soundcore snd_page_alloc cfg80211 compat_firmware_class joydev dell_laptop video dcdbas v4l1_compat output lp parport usbhid hid v4l2_compat_ioctl32 psmouse serio_raw ahci r8169 mii
[ 1967.618787] Pid: 0, comm: swapper Tainted: P W 2.6.32-19-generic #28-Ubuntu Studio 1557
[ 1967.618796] RIP: 0010:[<ffffffff8130ce7e>] [<ffffffff8130ce7e>] acpi_idle_enter_simple+0x117/0x14b
[ 1967.618816] RSP: 0018:ffff880133b4bea8 EFLAGS: 00000202
[ 1967.618822] RAX: 0000000000010570 RBX: ffff880133b4bee8 RCX: 00000000000f4240
[ 1967.618830] RDX: ffff880028300000 RSI: 0000000000000000 RDI: 000000000000d59c
[ 1967.618837] RBP: ffffffff81013b0e R08: 0000000000000000 R09: 00000000000000f5
[ 1967.618844] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff81543626
[ 1967.618852] R13: ffff880133b4be48 R14: 00000000ffffffff R15: ffff880130dc000c
[ 1967.618861] FS: 0000000000000000(0000) GS:ffff880028300000(0000) knlGS:0000000000000000
[ 1967.618870] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[ 1967.618877] CR2: 00007ffafac68000 CR3: 00000000b72af000 CR4: 00000000000026e0
[ 1967.618885] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1967.618892] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1967.618899] Call Trace:
[ 1967.618910] [<ffffffff8130ce77>] ? acpi_idle_enter_simple+0x110/0x14b
[ 1967.618923] [<ffffffff81437067>] ? cpuidle_idle_call+0xa7/0x140
[ 1967.618937] [<ffffffff81011e73>] ? cpu_idle+0xb3/0x110
[ 1967.618947] [<ffffffff8153a85c>] ? start_secondary+0xa8/0xaa

$ sudo rfkill list
0: dell-wifi: Wireless LAN
        Soft blocked: no
        Hard blocked: yes
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no