I still have issues with these and the Raspberry PI.

They are detected, and they mine for a while, on the 7-port d-link usb 2.0 powered hub. Then some of them die. (go ZOMBIE on cgminer) and disappear from lsusb.

Is this a power issue? They work fine on an anker usb 3.0 hub connected to my macbook pro.

I Had two bi*fury connected to the pi, working for some 20 minutes fine... then I connected a third. This happened:

Code:

Block: 1d1d8f98... Diff:5.01G Started: [20:07:33] Best share: 8.66K
--------------------------------------------------------------------------------------------------
[U]SB device management [P]ool management [S]ettings [D]isplay options [Q]uit
0: AMU 0: | 335.3M/333.1Mh/s | A: 87 R: 0 HW:0 WU: 4.7/m
1: BXF 0: 55.3C | ZOMBIE/4.910Gh/s | A:1538 R:13 HW:0 WU: 68.6/m
2: BXF 1: 49.0C | ZOMBIE/4.648Gh/s | A:1363 R:14 HW:0 WU: 64.9/m
3: BXF 2: 62.4C | ZOMBIE/3.760Gh/s | A: 49 R: 0 HW:0 WU: 53.7/m
--------------------------------------------------------------------------------------------------
[2014-03-31 20:07:34] Pool 0 stale share detected, submitting as user requested
[2014-03-31 20:07:35] Rejected 10587b38 Diff 16/7 BXF 0 (Stale share)
[2014-03-31 20:07:46] Accepted 020eb0fa Diff 124/7 AMU 0
[2014-03-31 20:07:47] Accepted 0730ef18 Diff 36/7 BXF 2
[2014-03-31 20:07:52] Accepted 247c2363 Diff 7/7 BXF 2
[2014-03-31 20:08:34] BXF 1: No valid hashes for over 1 minute, attempting to reset
[2014-03-31 20:08:35] BXF 1 BXFRead usb read err:(-4) LIBUSB_ERROR_NO_DEVICE
[2014-03-31 20:08:35] BXF 0 BXFWork usb write err:(-7) LIBUSB_ERROR_TIMEOUT
[2014-03-31 20:08:35] BXF 2 BXFWork usb write err:(-7) LIBUSB_ERROR_TIMEOUT
[2014-03-31 20:08:35] BXF 0 BXFRead usb read err:(-4) LIBUSB_ERROR_NO_DEVICE
[2014-03-31 20:08:35] BXF 2 BXFRead usb read err:(-4) LIBUSB_ERROR_NO_DEVICE
[2014-03-31 20:08:35] BXF 1 attempted reset got err:(-5) LIBUSB_ERROR_NOT_FOUND
[2014-03-31 20:08:36] BXF 1 failure, disabling!
[2014-03-31 20:08:40] BXF 0 attempted reset got err:(-5) LIBUSB_ERROR_NOT_FOUND
[2014-03-31 20:08:40] BXF 0: Error -5 sending BXFWork sent 163 of 163
[2014-03-31 20:08:40] BXF 0: No valid hashes for over 1 minute, attempting to reset
[2014-03-31 20:08:40] BXF 0 failure, disabling!
[2014-03-31 20:08:43] BXF 2 attempted reset got err:(-5) LIBUSB_ERROR_NOT_FOUND
[2014-03-31 20:08:43] BXF 2: Error -5 sending BXFWork sent 161 of 161
[2014-03-31 20:08:43] BXF 2 failure, disabling!

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