Re: usbhid: PicoLCD 256x64 USB error -71

["Bruno Prémont" <bonbons@linux-vserver.org>]

Hi Kieran,

On Fri, 16 May 2014 "Kieran Kunhya" <kierank@obe.tv> wrote:
> As requested I forward my bug report to the list:
> 
> From time to time on an ASRock IMB-181D motherboard this device fails to be
> added. 
> It seems to work reliably when using Windows 7. 
> The errors in dmesg vary but usually take the form: 
> [  5.328040] usb 3-7: string descriptor 0 read error: -71 
> (snip) 
> [  10.333605] usbhid 3-7:1.0: can't add hid device: -71 
> [  10.333639] usbhid: probe of 3-7:1.0 failed with error -71 
> I can provide a PicoLCD unit if necessary and possibly also fund a
> fix/workaround.
> 
> More information is available here:
> https://bugzilla.kernel.org/show_bug.cgi?id=76341

Hm, picoLCD works for me, but I get -71 error code if I swap both
data pins (but with read failure "device descriptor read/64, error -71").

Here it works with:
  J4, pin 1 = red
  J4, pin 2 = white
  J4, pin 3 = green
  J4, pin 4 = black
  J4, pin 5 = n/a

I successfully tried on:
- Gigabyte mainboard (GA-A75M-UD2H) (USB2 & USB3 ports) [3.15-rc5, 64bit]
- Acer Travelmate 66x [3.15-rc2, 32bit]
- Commell LE-365 [3.14, 32bit]
- IEI KINO-690S1 [3.14, 64bit]


Did some previous kernel release work?
Could you provide verbose lsusb output and firmware version for your PicoLCD?

Thanks,
Bruno
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