Knoppix ehci-hcd BIOS handoff failed et shpch

Bonjours,
Je viens de passer de Mandrake a Knoppix et suis assez noob (cela fais 6 mois que je suis sous linux).

J'ai un probleme lié a un port usb: au démarrage, j'ai :

ehci-hcd Bios handoff failed (104,1010001)

je me suis précipité sur ma console et ai fait un dmesg qui m'a renvoyé cette partie:

cs46xx: Unknown card (1681:A011) at 0xdfffb000/0xdfe00000, IRQ 17
ac97_codec: AC97 Modem codec, id: CRY45 (Cirrus Logic CS4294)
NTFS driver 2.1.22 [Flags: R/W MODULE].
NET: Registered protocol family 17
NET: Registered protocol family 10
Disabled Privacy Extensions on device c0381d00(lo)
IPv6 over IPv4 tunneling driver
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
shpchp: acpi_shpchprm:get_device PCI ROOT HID fail=0x1001
ehci_hcd 0000:00:10.4: VIA Technologies, Inc. USB 2.0
ehci_hcd 0000:00:10.4: BIOS handoff failed (104, 1010001)
ehci_hcd 0000:00:10.4: continuing after BIOS bug...
ehci_hcd 0000:00:10.4: new USB bus registered, assigned bus number 5
ehci_hcd 0000:00:10.4: irq 21, io mem 0xdffffe00
ehci_hcd 0000:00:10.4: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 8 ports detected
usb 5-2: new high speed USB device using ehci_hcd and address 2
ehci_hcd 0000:00:10.4: Unlink after no-IRQ?  Controller is probably using the wrong IRQ.
usb 5-2: device not accepting address 2, error -110
usb 5-2: new high speed USB device using ehci_hcd and address 3
usb 5-2: device not accepting address 3, error -110
usb 5-2: new high speed USB device using ehci_hcd and address 4
usb 5-2: device not accepting address 4, error -110
usb 5-2: new high speed USB device using ehci_hcd and address 5
usb 5-2: device not accepting address 5, error -110
usb 5-4: new high speed USB device using ehci_hcd and address 6
usb 5-4: device not accepting address 6, error -110
usb 5-4: new high speed USB device using ehci_hcd and address 7
usb 5-4: device not accepting address 7, error -110
usb 5-4: new high speed USB device using ehci_hcd and address 8
usb 5-4: device not accepting address 8, error -110
usb 5-4: new high speed USB device using ehci_hcd and address 9
usb 5-4: device not accepting address 9, error -110
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
lp0: using parport0 (interrupt-driven)

il y a visiblement un probleme avec un certain module shpchp mais je ne sait a quoi il correspond... (ma carte son a aussi un problème,mais ca,je vais essayer d'abord tout seul avant de poster)

Je me livre donc a vous pour ce probleme. je ne sait plus que faire...

Merci