Re: Inactive keyboard on Acer Aspire Switch 11

[Florian Echtler <floe@butterbrot.org>]

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Hello Benjamin,

On 27.02.2015 01:46, Benjamin Tissoires wrote:
> On Thu, Feb 26, 2015 at 6:18 PM, Florian Echtler <floe@butterbrot.org> wrote:
>> The device in question has two endpoints:
>>
>> T:  Bus=02 Lev=02 Prnt=04 Port=02 Cnt=01 Dev#=  7 Spd=12  MxCh= 0
>> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
>> P:  Vendor=06cb ProdID=2991 Rev=00.06
>> S:  Manufacturer=ITE Tech. Inc.
>> S:  Product=ITE Device(8595)
>> C:  #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
>> I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
>> I:  If#= 1 Alt= 0 #EPs= 2 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
>>
>> According to lsusb, the second one is a mouse (= touchpad), while the
>> first one is a keyboard (see attached lsusb.txt). Judging from the
>> dmesg, this is also the one which fails to initialize. Can anyone
>> suggest any quirks/fixes to try here?
> 
> Hi Florian,
> 
> This was a known bug which has been fixed in a more recent kernel than
> 3.16. I think a 3.17 might work, but I think a 3.18 would be a better
> choice.
> cf: e19ff99f256aeeff6c07b373e01883b72e049552 in Linus' tree

thanks for the quick reply. I've tried both 3.18.7 and 3.19.0 kernels,
but still get (slightly different) error messages:

[    2.550306] hidraw: raw HID events driver (C) Jiri Kosina
[    2.877672] hid (null): usage index exceeded
[    2.927474] usbcore: registered new interface driver usbhid
[    2.927476] usbhid: USB HID core driver
[    3.135496] i2c_hid i2c-ITE8380:00: error in i2c_hid_init_report
size:19 / ret_size:18
[    3.150002] hid-multitouch 0018:06CB:77B2.0002: input,hidraw0:
<UNKNOWN> HID v1.00 Mouse [SYNA7508:00 06CB:77B2] on
[    3.150784] hid-multitouch 0003:06CB:2991.0004:
input,hiddev0,hidraw1: USB HID v1.10 Mouse [ITE Tech. Inc. ITE
Device(8595)] on usb-0000:00:14.0-4.3/input1
[    3.153892] hid-generic 0003:06CB:2991.0003: usage index exceeded
[    3.153896] hid-generic 0003:06CB:2991.0003: item 0 2 2 2 parsing failed
[    3.153921] hid-generic: probe of 0003:06CB:2991.0003 failed with
error -22

After a bit of digging through the kernel code, could it be that the
06CB:2991 device needs to be added to the hid_have_special_driver list
(which AFAICT will only appear in 4.0)?

Best regards, Florian
-- 
SENT FROM MY DEC VT50 TERMINAL


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