-- [22:02:38] ~/nouveau/hang2 --

pq@daedalus $ [ 1125.384982] Unable to handle kernel NULL pointer dereference at 0000000000000010 RIP: 
[ 1125.417798]  [<ffffffff881cf574>] :nouveau:nouveau_chip_instance_get+0x9/0x38
[ 1125.475181] PGD 3082c067 PUD 3703c067 PMD 0 
[ 1125.500856] Oops: 0000 [1] PREEMPT 
[ 1125.521803] CPU 0 
[ 1125.533861] Modules linked in: nouveau drm w83627hf hwmon_vid i2c_isa snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss nf_conntrack_ftp nf_conntrack_irc nf_conntrack snd_via82xx gameport snd_ac97_codec ac97_bus snd_mpu401_uart snd_rawmidi snd_seq_device tuner usbhid tvaudio snd_bt87x snd_pcm snd_timer snd soundcore snd_page_alloc bttv video_buf firmware_class ir_common compat_ioctl32 i2c_algo_bit btcx_risc tveeprom videodev v4l2_common v4l1_compat i2c_viapro i2c_core ohci1394 ieee1394 sg psmouse serio_raw k8temp evdev ne2k_pci 8390 ehci_hcd skge uhci_hcd
[ 1125.838758] Pid: 4889, comm: X Not tainted 2.6.20-gentoo #1
[ 1125.872074] RIP: 0010:[<ffffffff881cf574>]  [<ffffffff881cf574>] :nouveau:nouveaud18b6
[ 1126.396410]  ffff810037890000 000000000000001f 00000000ffeeffee ffff810037890000
[ 1126.440849]  00000000ffffffff 00000000ffffffff ffffffff805e0f18 ffffffff881d0519
[ 1126.484198] Call Trace:
[ 1126.499895]  <IRQ>  [<ffffffff881d18b6>] :nouveau:nouveau_nv20_context_switch+0xcc/0x246
[ 1126.548397]  [<ffffffff881d0519>] :nouveau:nouveau_irq_handler+0x508/0x63f
[ 1126.589511]  [<ffffffff80210a71>] handle_IRQ_event+0x27/0x57
[ 1126.623396]  [<ffffffff80296716>] handle_fasteoi_irq+0xa4/0x100
[ 1126.658792]  [<ffffffff80265b9a>] do_IRQ+0xe1/0x12f
[ 1126.687950]  [<ffffffff8025bec1>] ret_from_intr+0x0/0xa
[ 1126.719183]  <EOI>  [<ffffffff803473e7>] pci_user_write_config_dword+0x61/0x8a
[ 1126.762484]  [<ffffffff803473de>] pci_user_write_config_dword+0x58/0x8a
[ 1126.802039]  [<ffffffff8034e368>] proc_bus_pci_write+0x103/0x164
[ 1126.837954]  [<ffffffff802163e0>] vfs_write+0xcf/0x178
[ 1126.868673]  [<ffffffff80216d99>] sys_write+0x47/0x70
[ 1126.898870]  [<ffffffff8025b9ae>] system_call+0x7e/0x83
[ 1126.930109] 
[ 1126.938991] 
[ 1126.938992] Code: 48 8b 56 10 89 d3 c1 eb 04 83 3d a4 c7 ff ff 00 74 17 89 d9 
[ 1126.992164] RIP  [<ffffffff881cf574>] :nouveau:nouveau_chip_instance_get+0x9/0x38
[ 1127.036968]  RSP <ffffffff805e0e78>
[ 1127.057809] CR2: 0000000000000010
[ 1127.077614]  <0>Kernel panic - not syncing: Aiee, killing interrupt handler!
[ 1127.119819]