On Thu, 20 Mar 2008 00:11:05 +0100 (CET), Jiri Kosina <jkosina@xxxxxxx> wrote:
> On Wed, 19 Mar 2008, Pete Zaitcev wrote:
> > This must be the weirdest failure yet. My external disk stops processing
> > the storage commands the moment it receives a GET_REPORT. The firmware
> > does not crash; if I do rmmod hid, then SET-INTERFACE restores normal
> > operations. Still, I cannot live without the keyboard when I want backup
> > my files. Adding the NOGET quirk fixes this problem for me.
> uhm ... how does the GET_REPORT get delivered to the external disk? Does
> it have any interface that claims itself to be HID class?
It is very common for them to have a "one-touch backup" button.
Here's how its summary looks:
T: Bus=01 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 13 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0c0b ProdID=5fab Rev= 3.53
S: Manufacturer=DMI
S: Product=WD5000AAKB-00UKA
S: SerialNumber=001010055008053D0
C:* #Ifs= 2 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=ub
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid
E: Ad=83(I) Atr=03(Int.) MxPS= 64 Ivl=64ms
To tell you the truth, I just now noticed that the button does not
work. Kernel prints this:
hiddev96hidraw0: USB HID v1.10 Device [DMI WD5000AAKB-00UKA] on usb-0000:00:13.5-3
But then the events do not get delivered. This is what happens
with DEBUG enabled in hid-core.c:
usb 2-3.2: new high speed USB device using address 3
INPUT[INPUT]
Field(0)
Usage(2)
ffa0.00a6
ffa0.00a7
Logical Minimum(-128)
Logical Maximum(127)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
OUTPUT[OUTPUT]
Field(0)
Usage(2)
ffa0.00a9
ffa0.00a9
Logical Minimum(-128)
Logical Maximum(127)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
hiddev96: USB HID v1.10 Device [DMI WD5000AAKB-00UKA] on usb-0000:05:04.3-3.2
I dunno, maybe the button is just broken somehow. But I'm only
interested in the storage function.
-- Pete
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