[gutsy] kernel freezes at start up PPC

Binary package hint: linux-image-2.6-powerpc

Problem:
Laptop freezes during start up. (Not hangs)

Detailed information:
I rebooted in verbose mode, and I realized that the kernel freezes just after (or during) the Network configuration. I have been doing some experiments, and I realized the kernel is still running because when I plug/unplug the ethernet cable it shows "eht0 link is up / down" . So, I guess that means that the kernel is not 'dead'. (If somebody know how to take the log of the kernel, I'll do that ). So, maybe the problem is related with the airport module... I'll check it.

Cause:
Upgrading the system to gutsy. So, upgrading from kernel 2.6.20 to 2.6.22 .

Hardware:
PowerBook G4

Detailed Info:

processor : 0
cpu : 7455, altivec supported
clock : 667.000000MHz
revision : 0.1 (pvr 8001 0201)
bogomips : 66.56
timebase : 33331323
platform : PowerMac
machine : PowerBook3,4
motherboard : PowerBook3,4 MacRISC2 MacRISC Power Macintosh
detected as : 73 (PowerBook Titanium III)
pmac flags : 0000001b
L2 cache : 256K unified
pmac-generation : NewWorld

lsmod information :

Module Size Used by
airport 7104 0
ppdev 11268 0
lp 13580 0
parport 44304 2 ppdev,lp
nfs 286796 0
lockd 76472 1 nfs
sunrpc 193996 2 nfs,lockd
af_packet 24936 4
ipv6 307884 8
binfmt_misc 13672 1
radeon 144776 2
drm 96920 3 radeon
fuse 52820 1
sbp2 25188 0
scsi_mod 181324 1 sbp2
apm_emu 8012 1
snd_aoa_i2sbus 24292 0
snd_pcm_oss 53984 0
snd_mixer_oss 20960 1 snd_pcm_oss
snd_pcm 95812 2 snd_aoa_i2sbus,snd_pcm_oss
snd_page_alloc 11368 1 snd_pcm
snd_seq_dummy 4004 0
snd_seq_oss 40660 0
snd_seq_midi 10016 0
snd_rawmidi 29632 1 snd_seq_midi
snd_seq_midi_event 8192 2 snd_seq_oss,snd_seq_midi
snd_seq 61888 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 26404 2 snd_pcm,snd_seq
snd_seq_device 9388 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd 69812 9 snd_aoa_i2sbus,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
pcmcia 46544 0
soundcore 8996 1 snd
snd_aoa_soundbus 7812 1 snd_aoa_i2sbus
orinoco 44948 1 airport
hermes 8352 2 airport,orinoco
pmac_zilog 21140 0
serial_core 24384 1 pmac_zilog
yenta_socket 31660 1
rsrc_nonstatic 13920 1 yenta_socket
uninorth_agp 12012 1
agpgart 41308 2 drm,uninorth_agp
pcmcia_core 49240 3 pcmcia,yenta_socket,rsrc_nonstatic
tsdev 9056 0
evdev 12800 8
ext3 159048 1
jbd 68488 1 ext3
mbcache 9572 1 ext3
ide_cd 36900 0
cdrom 47580 1 ide_cd
ide_disk 18880 3
sungem 35460 0
sungem_phy 12128 1 sungem
ohci1394 43152 0
ieee1394 430800 2 sbp2,ohci1394
ohci_hcd 36100 0
usbcore 158260 2 ohci_hcd
windfarm_core 14384 0
commoncap 7968 0

lspci information:

0000:00:0b.0 Host bridge: Apple Computer Inc. UniNorth 1.5 AGP
0000:00:10.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500]
0001:10:0b.0 Host bridge: Apple Computer Inc. UniNorth 1.5 PCI
0001:10:17.0 Class ff00: Apple Computer Inc. KeyLargo Mac I/O (rev 03)
0001:10:18.0 USB Controller: Apple Computer Inc. KeyLargo USB
0001:10:19.0 USB Controller: Apple Computer Inc. KeyLargo USB
0001:10:1a.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller (rev 02)
0002:24:0b.0 Host bridge: Apple Computer Inc. UniNorth 1.5 Internal PCI
0002:24:0e.0 FireWire (IEEE 1394): Agere Systems FW323
0002:24:0f.0 Ethernet controller: Apple Computer Inc. UniNorth GMAC (Sun GEM) (rev 01)