ExpressCard USB3 Renesas/NEC uPD720202

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Bonjour,

Je viens de récupérer une ExpressCard Startech ECUSB3S11 à b=
ase de chipset
Renesas/NEC uPD720202. Si j'en crois les sources du noyau ça semble =
être
supporté mais pas moyen de la faire fonctionner sur Lenovo T420 sous D=
ebian
testing.

Dans syslog j'ai l'impression que la carte est bien vue car j'ai ceci:

kernel: [ 3.283757] xhci_hcd 0000:05:00.0: xHCI Host Controller
kernel: [ 3.283763] xhci_hcd 0000:05:00.0: new USB bus registered, assig=
ned
bus number 4
kernel: [ 3.283768] xhci_hcd 0000:05:00.0: Host supports USB 3.0 SuperS=
peed
kernel: [ 3.283831] usb usb4: We don't know the algorithms for LPM for t=
his
host, disabling LPM.
kernel: [ 3.283919] usb usb4: New USB device found, idVendor=1d6b,
idProduct=0003, bcdDevice= 4.18
kernel: [ 3.283921] usb usb4: New USB device strings: Mfr=3, Product=
=2,
SerialNumber=1
kernel: [ 3.283923] usb usb4: Product: xHCI Host Controller
kernel: [ 3.283924] usb usb4: Manufacturer: Linux 4.18.0-2-amd64 xhci-hc=
d
kernel: [ 3.283926] usb usb4: SerialNumber: 0000:05:00.0
kernel: [ 3.284090] hub 4-0:1.0: USB hub found
kernel: [ 3.284106] hub 4-0:1.0: 2 ports detected

Par contre quand j'insère une clé usb j'ai les 2 logs suivant qui=
apparaissent:

kernel: [ 709.077770] usb usb2: root hub lost power or was reset
kernel: [ 709.077774] usb usb3: root hub lost power or was reset

Mais je ne comprends pas bien le rapport vu que la carte semble être u=
sb4

Une idée ?

Gaëtan

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