[CentOS] No USB 3.0 and audio sound with CentOS 5.6

Hi,
 
I installed CentOS 5.6 on a Dell Precision Laptop M4600.
 
 
This laptop has 2 USB 3 connectors. Nothing work (mouse or usb key...)
when I connected something on this 2 ports. 
 
And sound not working on this laptop.
 
[root at localhost ~]# lspci
00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev
09)
00:01.0 PCI bridge: Intel Corporation Sandy Bridge PCI Express Root Port
(rev 09)
00:16.0 Communication controller: Intel Corporation Cougar Point HECI
Controller #1 (rev 04)
00:16.3 Serial controller: Intel Corporation Cougar Point KT Controller
(rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network
Connection (rev 04)
00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host
Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Cougar Point High Definition
Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port
1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port
2 (rev b4)
00:1c.2 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port
3 (rev b4)
00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port
4 (rev b4)
00:1c.7 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port
8 (rev b4)
00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host
Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev
04)
00:1f.2 RAID bus controller: Intel Corporation Mobile 82801 SATA RAID
Controller (rev 04)
00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 04)
01:00.0 VGA compatible controller: nVidia Corporation Device 0dfa (rev
a1)
01:00.1 Audio device: nVidia Corporation Device 0bea (rev a1)
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300
(rev 35)
0a:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host
Controller (rev 04)
0b:00.0 FireWire (IEEE 1394): O2 Micro, Inc. Device 11f7 (rev 05)
0b:00.1 SD Host controller: O2 Micro, Inc. Device 8320 (rev 05)
0b:00.2 Mass storage controller: O2 Micro, Inc. Device 8330 (rev 05)
[root at localhost ~]#
 
 
Did someone know what to do for sound and for this 2 USB 3.0 connectors
?
 
 
 
Regards.
 
 
 
 
 
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