pi@raspberrypi ~ $ dmesg | grep tty*
[    0.000000] Kernel command line: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708.boardrev=0xd bcm2708.serial=0xb4c85aef smsc95xx.macaddr=B8:27:EB:C8:5A:EF sdhci-bcm2708.emmc_clock_freq=100000000 vc_mem.mem_base=0x1f000000 vc_mem.mem_size=0x20000000  dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
[    0.000000] console [tty1] enabled
[    0.577003] dev:f1: ttyAMA0 at MMIO 0x20201000 (irq = 83) is a PL011 rev3
[    0.887025] console [ttyAMA0] enabled
[    1.543292] Setting default values for core params
[    1.550245] Finished setting default values for core params
[    6.464775] usb 1-1.2: cp210x converter now attached to ttyUSB0

--------------------------------------------------------------------------------
cgminer version 3.2.2 - Started: [2013-06-19 15:35:51]
--------------------------------------------------------------------------------
 (5s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  U:0.0/m  WU:0.0/m
 ST: 2  SS: 0  NB: 1  LW: 0  GF: 0  RF: 0
 Connected to btcguild.com diff 1 with LP as user plutbobo_1
 Block: 009372e7dbd46435...  Diff:19.3M  Started: [15:35:50]  Best share: 0
--------------------------------------------------------------------------------
 [P]ool management ettings [D]isplay options [Q]uit
--------------------------------------------------------------------------------

 [2013-06-19 15:35:49] No devices detected!
 [2013-06-19 15:35:49] Waiting for USB hotplug devices or press q to quit
 [2013-06-19 15:35:49] Probing for an alive pool
 [2013-06-19 15:35:50] Network diff set to 19.3M
 [2013-06-19 15:35:50] Long-polling activated for http://btcguild.com:8332/LP/
 [2013-06-19 15:35:56] USB init open device failed, err -3, you dont have privil
edge to access - AMU device 1:4
 [2013-06-19 15:35:56] Icarus detect (1:4) failed to initialise (incorrect devic
e?)
 [2013-06-19 15:36:01] USB init open device failed, err -3, you dont have privil
edge to access - AMU device 1:4
 [2013-06-19 15:36:01] Icarus detect (1:4) failed to initialise (incorrect devic
e?)
--------------------------------------------------------------------------------
Please help me, thank you!

Root?if not root it!

1.安装了CP210X驱动，如下：
pi@raspberrypi ~ $ dmesg | grep tty*
[    0.000000] Kernel command line: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708.boardrev=0xd bcm2708.serial=0xb4c85aef smsc95xx.macaddr=B8:27:EB:C8:5A:EF sdhci-bcm2708.emmc_clock_freq=100000000 vc_mem.mem_base=0x1f000000 vc_mem.mem_size=0x20000000  dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
[    0.000000] console [tty1] enabled
[    0.577003] dev:f1: ttyAMA0 at MMIO 0x20201000 (irq = 83) is a PL011 rev3
[    0.887025] console [ttyAMA0] enabled
[    1.543292] Setting default values for core params
[    1.550245] Finished setting default values for core params
[    6.464775] usb 1-1.2: cp210x converter now attached to ttyUSB0
2.cgminer 3.2.2 运行的状态，如下：
 cgminer version 3.2.2 - Started: [2013-06-19 15:35:51]
--------------------------------------------------------------------------------
 (5s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  U:0.0/m  WU:0.0/m
 ST: 2  SS: 0  NB: 1  LW: 0  GF: 0  RF: 0
 Connected to btcguild.com diff 1 with LP as user plutbobo_1
 Block: 009372e7dbd46435...  Diff:19.3M  Started: [15:35:50]  Best share: 0
--------------------------------------------------------------------------------
 [P]ool management ettings [D]isplay options [Q]uit
--------------------------------------------------------------------------------

 [2013-06-19 15:35:49] No devices detected!
 [2013-06-19 15:35:49] Waiting for USB hotplug devices or press q to quit
 [2013-06-19 15:35:49] Probing for an alive pool
 [2013-06-19 15:35:50] Network diff set to 19.3M
 [2013-06-19 15:35:50] Long-polling activated for http://btcguild.com:8332/LP/
 [2013-06-19 15:35:56] USB init open device failed, err -3, you dont have privil
edge to access - AMU device 1:4
 [2013-06-19 15:35:56] Icarus detect (1:4) failed to initialise (incorrect devic
e?)
 [2013-06-19 15:36:01] USB init open device failed, err -3, you dont have privil
edge to access - AMU device 1:4
 [2013-06-19 15:36:01] Icarus detect (1:4) failed to initialise (incorrect devic
e?)
--------------------------------------------------------------------------------
请问怎么解决，这个问题，3Q！