Hi Leann.

Thanks for you reply.

I get this message with 2.6.24.16.18 after a couple of minutes:
[ 1108.597128] irq 19: nobody cared (try booting with the "irqpoll" option)
[ 1108.597143] Pid: 0, comm: swapper Not tainted 2.6.24-16-generic #1
[ 1108.597147] 
[ 1108.597148] Call Trace:
[ 1108.597152]  <IRQ>  [<ffffffff8027ad8e>] __report_bad_irq+0x1e/0x80
[ 1108.597203]  [<ffffffff8027b09d>] note_interrupt+0x2ad/0x2e0
[ 1108.597230]  [<ffffffff8027bbe1>] handle_fasteoi_irq+0xa1/0x110
[ 1108.597249]  [<ffffffff8020ef6b>] do_IRQ+0x7b/0x100
[ 1108.597262]  [<ffffffff8020c891>] ret_from_intr+0x0/0xa
[ 1108.597268]  <EOI>  [<ffffffff802204e0>] lapic_next_event+0x0/0x10
[ 1108.597315]  [<ffffffff8802e6f3>] 
:processor:acpi_idle_enter_simple+0x162/0x1cb
[ 1108.597340]  [<ffffffff8802e6e9>] 
:processor:acpi_idle_enter_simple+0x158/0x1cb
[ 1108.597352]  [<ffffffff8020b390>] default_idle+0x0/0x40
[ 1108.597365]  [<ffffffff803d10a2>] cpuidle_idle_call+0xa2/0xe0
[ 1108.597371]  [<ffffffff8020b390>] default_idle+0x0/0x40
[ 1108.597376]  [<ffffffff803d1000>] cpuidle_idle_call+0x0/0xe0
[ 1108.597385]  [<ffffffff8020b43f>] cpu_idle+0x6f/0xc0
[ 1108.597443] 
[ 1108.597446] handlers:
[ 1108.597449] [<ffffffff8809f300>] (usb_hcd_irq+0x0/0x60 [usbcore])
[ 1108.597483] Disabling IRQ #19

If I suspend to ram then, and wake up, I'll get the Oops:
[    7.988378] Oops: 0000 [1] SMP 
[    7.988382] CPU 0 
[    7.988384] Modules linked in: [... stripped, see attachment for details ...]
[    7.988475] Pid: 8293, comm: btdelconn Not tainted 2.6.24-16-generic #1
[    7.988478] RIP: 0010:[<ffffffff802febc8>]  [<ffffffff802febc8>] 
sysfs_get_dentry+0x38/0xa0
[    7.988482] RSP: 0018:ffff8100541f9db0  EFLAGS: 00010282
[    7.988484] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000026
[    7.988486] RDX: ffff810078eae320 RSI: 0000000000000025 RDI: ffff810070002c30
[    7.988489] RBP: ffff8100703570d0 R08: 0000000000000023 R09: 0000000000000000
[    7.988491] R10: 8000000000000000 R11: ffffffff80311760 R12: ffff81005026dbe0
[    7.988493] R13: 00000000fffffff4 R14: ffff810054109580 R15: 0000000000000000
[    7.988496] FS:  0000000000000000(0000) GS:ffffffff805b0000(0000) 
knlGS:0000000000000000
[    7.988499] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[    7.988501] CR2: 0000000000000008 CR3: 000000007a28c000 CR4: 00000000000006e0
[    7.988503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    7.988506] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[    7.988508] Process btdelconn (pid: 8293, threadinfo ffff8100541f8000, task 
ffff810057e247c0)
[    7.988510] Stack:  ffff810079fc5140 ffff81003782c8c0 ffff81005026dbe0 
ffffffff802fee32
[    7.988516]  00000000000080d0 ffff810079fc5140 ffff81005e69ccf0 
ffff81006024c9c0
[    7.988520]  00000000fffffff4 ffff810054109580 0000000000000000 
ffffffff80344c73
[    7.988524] Call Trace:
[    7.988532]  [<ffffffff802fee32>] sysfs_move_dir+0x52/0x230
[    7.988546]  [<ffffffff80344c73>] kobject_move+0xb3/0x140
[    7.988559]  [<ffffffff803b711a>] device_move+0x6a/0x150
[    7.988577]  [<ffffffff886b0eaa>] :bluetooth:del_conn+0x1a/0x60
[    7.988587]  [<ffffffff886b0e90>] :bluetooth:del_conn+0x0/0x60
[    7.988592]  [<ffffffff8024f21c>] run_workqueue+0xcc/0x170
[    7.988595]  [<ffffffff8024fda0>] worker_thread+0x0/0x110
[    7.988601]  [<ffffffff8024fda0>] worker_thread+0x0/0x110
[    7.988606]  [<ffffffff8024fe43>] worker_thread+0xa3/0x110
[    7.988612]  [<ffffffff80253960>] autoremove_wake_function+0x0/0x30
[    7.988620]  [<ffffffff8024fda0>] worker_thread+0x0/0x110
[    7.988625]  [<ffffffff8024fda0>] worker_thread+0x0/0x110
[    7.988629]  [<ffffffff8025359b>] kthread+0x4b/0x80
[    7.988637]  [<ffffffff8020d198>] child_rip+0xa/0x12
[    7.988657]  [<ffffffff80253550>] kthread+0x0/0x80
[    7.988662]  [<ffffffff8020d18e>] child_rip+0x0/0x12
[    7.988668]  [...]

I'll attach my full dmesg for reference.

To reproduce this, I basically start bluetooth:
> sudo modprobe hci_usb
> sudo /etc/init.d/bluetooth restart
> gnome-obex-server&

and open a serial connection:
> sudo rfcomm release 1
> sudo rfcomm bind 1 DE:AD:BE:EF:23:42
> sudo wvdial

I'll then do a curlftps or disable wireless, but I dunno whether this
relevant for this issue.

I'll try the new kernel in a minute.

** Attachment added: "dmesg before suspend to ram"
   http://launchpadlibrarian.net/14492888/dmesg-bluetooth-oops.txt

-- 
2.6.24-16-generic Oopses: " comm: btdelconn Not tainted" "Unable to handle 
kernel NULL pointer dereference at 0000000000000008 RIP:"
https://bugs.launchpad.net/bugs/223651
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