無法連接到Linux中的USB設備（Emotiv神經頭戴式耳機）

我有emotiv耳機，我試圖使用它的開源驅動程序。該設備列在usbls中，但不能與設備進行通信。在驅動程序的可執行文件上運行strace會導致我懷疑某些庫可能會丟失，但是我無法在其中找到哪些庫。無法連接到Linux中的USB設備（Emotiv神經頭戴式耳機）

我使用下面的示例程序：

#include <stdio.h> 
#include <string.h> 
#include <signal.h> 
#include "emokit/emokit.h" 

int quit; 
void cleanup(int i){ 
     fprintf(stdout,"Shutting down\n"); 
     quit=1; 
} 

int main(int argc, char **argv) 
{ 
     struct emokit_device* d; 
     signal(SIGINT, cleanup); //trap cntrl c 


     quit=0; 

     d = emokit_create(); 
     int count=emokit_get_count(d, EMOKIT_VID, EMOKIT_PID); 
     printf("Current epoc devices connected: %d\n", count); 
     int r = emokit_open(d, EMOKIT_VID, EMOKIT_PID, 1); 
     if(r != 0) 
     { 
       emokit_close(d); 
       emokit_delete(d); 
       d = emokit_create(); 
       r = emokit_open(d, EMOKIT_VID, EMOKIT_PID, 0); 
       if (r!=0) { 
         printf("CANNOT CONNECT: %d\n", r); 
         return 1; 
       } 
     } 
     printf("Connected to headset.\n"); 

     if (emokit_read_data(d)<=0) { 
       printf("Error reading from headset\n"); 
       emokit_close(d); 
       emokit_delete(d); 
       return 1; 
     } 

     struct emokit_frame c; 
     while (!quit) { 
       if(emokit_read_data(d) > 0) { 
         c = emokit_get_next_frame(d); 
         fprintf(stdout,"\033[H\033[2JPress CTRL+C to exit\n\nContact quality:\nF3 %4d\nFC6 %4d\nP7 %4d\nT8 %4d\nF7 %4d\nF8 %4d\nT7 %4d\nP8 %4d\nAF4 %4d\nF4 %4d\nAF3 %4d\nO2 %4d\nO1 %4d\nFC5 %4d",c.cq.F3, c.cq.FC6, c.cq.P7, c.cq.T8,c.cq.F7, c.cq.F8, c.cq.T7, c.cq.P8, c.cq.AF4, c.cq.F4, c.cq.AF3, c.cq.O2, c.cq.O1, c.cq.FC5); 
         fflush(stdout); 
       } 
     } 
     emokit_close(d); 
     emokit_delete(d); 
     return 0; 
}

試圖結果

./contact 
Current epoc devices connected: 0 
CANNOT CONNECT: -3

運行USB加密狗但是正確的我的Ubuntu 14.04薄荷識別和上市lsusb as

Bus 002 Device 004: ID 1234:ed02 Brain Actuated Technologies Emotiv EPOC Developer Headset Wireless Dongle

strace results below below lead to ide一的東西，必須從我的系統缺失（由「沒有這樣的文件或目錄」中strace的行數判斷）

sudo strace ./contact 
[sudo] password for user: 
execve("./contact", ["./contact"], [/* 17 vars */]) = 0 
brk(0)         = 0xe16000 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe8bc000 
access("/etc/ld.so.preload", R_OK)  = -1 ENOENT (No such file or directory) 
open("/usr/local/lib/tls/x86_64/libmcrypt.so.4", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
stat("/usr/local/lib/tls/x86_64", 0x7fffd58225d0) = -1 ENOENT (No such file or directory) 
open("/usr/local/lib/tls/libmcrypt.so.4", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
stat("/usr/local/lib/tls", 0x7fffd58225d0) = -1 ENOENT (No such file or directory) 
open("/usr/local/lib/x86_64/libmcrypt.so.4", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
stat("/usr/local/lib/x86_64", 0x7fffd58225d0) = -1 ENOENT (No such file or directory) 
open("/usr/local/lib/libmcrypt.so.4", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
stat("/usr/local/lib", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 
fstat(3, {st_mode=S_IFREG|0644, st_size=155101, ...}) = 0 
mmap(NULL, 155101, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7ebe896000 
close(3)        = 0 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/usr/lib/libmcrypt.so.4", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\[email protected]\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=187824, ...}) = 0 
mmap(NULL, 2306080, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebe468000 
mprotect(0x7f7ebe492000, 2097152, PROT_NONE) = 0 
mmap(0x7f7ebe692000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2a000) = 0x7f7ebe692000 
mmap(0x7f7ebe696000, 20512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe696000 
close(3)        = 0 
open("/usr/local/lib/libhidapi-hidraw.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/usr/lib/x86_64-linux-gnu/libhidapi-hidraw.so.0", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\27\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=14648, ...}) = 0 
mmap(NULL, 2109856, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebe264000 
mprotect(0x7f7ebe267000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebe466000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f7ebe466000 
close(3)        = 0 
open("/usr/local/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\37\2\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=1845024, ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe895000 
mmap(NULL, 3953344, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebde9e000 
mprotect(0x7f7ebe059000, 2097152, PROT_NONE) = 0 
mmap(0x7f7ebe259000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bb000) = 0x7f7ebe259000 
mmap(0x7f7ebe25f000, 17088, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe25f000 
close(3)        = 0 
open("/usr/local/lib/libudev.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libudev.so.1", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0200\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=67600, ...}) = 0 
mmap(NULL, 2164816, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebdc8d000 
mprotect(0x7f7ebdc9d000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebde9c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0x7f7ebde9c000 
close(3)        = 0 
open("/usr/local/lib/libcgmanager.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libcgmanager.so.0", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0206\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=108480, ...}) = 0 
mmap(NULL, 2203688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebda72000 
mprotect(0x7f7ebda8b000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebdc8a000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7f7ebdc8a000 
close(3)        = 0 
open("/usr/local/lib/libnih.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libnih.so.1", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`G\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=96280, ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe894000 
mmap(NULL, 2191776, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebd85a000 
mprotect(0x7f7ebd871000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebda70000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f7ebda70000 
close(3)        = 0 
open("/usr/local/lib/libnih-dbus.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libnih-dbus.so.1", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340,\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=38920, ...}) = 0 
mmap(NULL, 2134040, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebd650000 
mprotect(0x7f7ebd658000, 2097152, PROT_NONE) = 0 
mmap(0x7f7ebd858000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7f7ebd858000 
close(3)        = 0 
open("/usr/local/lib/libdbus-1.so.3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libdbus-1.so.3", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\[email protected]\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=281552, ...}) = 0 
mmap(NULL, 2377408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebd40b000 
mprotect(0x7f7ebd44f000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebd64e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x43000) = 0x7f7ebd64e000 
close(3)        = 0 
open("/usr/local/lib/librt.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P#\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0644, st_size=31792, ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe893000 
mmap(NULL, 2129016, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebd203000 
mprotect(0x7f7ebd20a000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebd409000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f7ebd409000 
close(3)        = 0 
open("/usr/local/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) 
access("/etc/ld.so.nohwcap", F_OK)  = -1 ENOENT (No such file or directory) 
open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0po\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=141574, ...}) = 0 
mmap(NULL, 2217264, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebcfe5000 
mprotect(0x7f7ebcffe000, 2093056, PROT_NONE) = 0 
mmap(0x7f7ebd1fd000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7f7ebd1fd000 
mmap(0x7f7ebd1ff000, 13616, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f7ebd1ff000 
close(3)        = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe892000 
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe890000 
arch_prctl(ARCH_SET_FS, 0x7f7ebe890740) = 0 
mprotect(0x7f7ebe259000, 16384, PROT_READ) = 0 
mprotect(0x7f7ebd1fd000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebd409000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebd64e000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebda70000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebd858000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebdc8a000, 8192, PROT_READ) = 0 
mprotect(0x7f7ebde9c000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebe466000, 4096, PROT_READ) = 0 
mprotect(0x7f7ebe692000, 8192, PROT_READ) = 0 
mprotect(0x603000, 4096, PROT_READ)  = 0 
mprotect(0x7f7ebe8be000, 4096, PROT_READ) = 0 
munmap(0x7f7ebe896000, 155101)   = 0 
set_tid_address(0x7f7ebe890a10)   = 5344 
set_robust_list(0x7f7ebe890a20, 24)  = 0 
futex(0x7fffd5822e10, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 7f7ebe890740) = -1 EAGAIN (Resource temporarily unavailable) 
rt_sigaction(SIGRTMIN, {0x7f7ebcfeb9f0, [], SA_RESTORER|SA_SIGINFO, 0x7f7ebcff5340}, NULL, 8) = 0 
rt_sigaction(SIGRT_1, {0x7f7ebcfeba80, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f7ebcff5340}, NULL, 8) = 0 
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 
rt_sigaction(SIGINT, {0x4015ad, [INT], SA_RESTORER|SA_RESTART, 0x7f7ebded4c30}, {SIG_DFL, [], 0}, 8) = 0 
brk(0)         = 0xe16000 
brk(0xe37000)       = 0xe37000 
uname({sys="Linux", node="stribog", ...}) = 0 
uname({sys="Linux", node="stribog", ...}) = 0 
open("/etc/udev/udev.conf", O_RDONLY|O_CLOEXEC) = 3 
fstat(3, {st_mode=S_IFREG|0644, st_size=148, ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe8bb000 
read(3, "# see udev(7) for details\n#\n# ud"..., 4096) = 148 
read(3, "", 4096)      = 0 
close(3)        = 0 
munmap(0x7f7ebe8bb000, 4096)   = 0 
stat("/sys/subsystem", 0x7fffd5822be0) = -1 ENOENT (No such file or directory) 
openat(AT_FDCWD, "/sys/bus", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 
getdents(3, /* 29 entries */, 32768) = 800 
getdents(3, /* 0 entries */, 32768)  = 0 
close(3)        = 0 
openat(AT_FDCWD, "/sys/class", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 
getdents(3, /* 54 entries */, 32768) = 1600 
openat(AT_FDCWD, "/sys/class/hidraw", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4 
getdents(4, /* 2 entries */, 32768)  = 48 
getdents(4, /* 0 entries */, 32768)  = 0 
close(4)        = 0 
getdents(3, /* 0 entries */, 32768)  = 0 
close(3)        = 0 
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 4), ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe8bb000 
write(1, "Current epoc devices connected: "..., 34Current epoc devices connected: 0 
) = 34 
uname({sys="Linux", node="stribog", ...}) = 0 
open("/etc/udev/udev.conf", O_RDONLY|O_CLOEXEC) = 3 
fstat(3, {st_mode=S_IFREG|0644, st_size=148, ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe8ba000 
read(3, "# see udev(7) for details\n#\n# ud"..., 4096) = 148 
read(3, "", 4096)      = 0 
close(3)        = 0 
munmap(0x7f7ebe8ba000, 4096)   = 0 
stat("/sys/subsystem", 0x7fffd5822bd0) = -1 ENOENT (No such file or directory) 
openat(AT_FDCWD, "/sys/bus", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 
getdents(3, /* 29 entries */, 32768) = 800 
getdents(3, /* 0 entries */, 32768)  = 0 
close(3)        = 0 
openat(AT_FDCWD, "/sys/class", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 
getdents(3, /* 54 entries */, 32768) = 1600 
openat(AT_FDCWD, "/sys/class/hidraw", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4 
getdents(4, /* 2 entries */, 32768)  = 48 
getdents(4, /* 0 entries */, 32768)  = 0 
close(4)        = 0 
getdents(3, /* 0 entries */, 32768)  = 0 
close(3)        = 0 
uname({sys="Linux", node="stribog", ...}) = 0 
uname({sys="Linux", node="stribog", ...}) = 0 
open("/etc/udev/udev.conf", O_RDONLY|O_CLOEXEC) = 3 
fstat(3, {st_mode=S_IFREG|0644, st_size=148, ...}) = 0 
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ebe8ba000 
read(3, "# see udev(7) for details\n#\n# ud"..., 4096) = 148 
read(3, "", 4096)      = 0 
close(3)        = 0 
munmap(0x7f7ebe8ba000, 4096)   = 0 
stat("/sys/subsystem", 0x7fffd5822bd0) = -1 ENOENT (No such file or directory) 
openat(AT_FDCWD, "/sys/bus", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 
getdents(3, /* 29 entries */, 32768) = 800 
getdents(3, /* 0 entries */, 32768)  = 0 
close(3)        = 0 
openat(AT_FDCWD, "/sys/class", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 
getdents(3, /* 54 entries */, 32768) = 1600 
openat(AT_FDCWD, "/sys/class/hidraw", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4 
getdents(4, /* 2 entries */, 32768)  = 48 
getdents(4, /* 0 entries */, 32768)  = 0 
close(4)        = 0 
getdents(3, /* 0 entries */, 32768)  = 0 
close(3)        = 0 
write(1, "CANNOT CONNECT: -3\n", 19CANNOT CONNECT: -3 
) = 19 
exit_group(1)       = ? 
+++ exited with 1 +++

來源

2014-09-30 Moonwalker

我不認爲有缺少的庫。如果任何圖書館不可用，你的程序甚至不會運行。我寧願檢查EMOKIT_VID和EMOKIT_PID是否有適當的值，因爲正如你所說 - linux識別這個設備，但只有應用程序不能連接到這個設備。

來源

2014-10-01 04:22:56 user2699113

我該如何檢查？ – Moonwalker 2014-10-01 12:20:50

使用「lsusb -v」並查看idVendor和idProduct - 可能是1234和ed02。然後檢查EMOKIT_VID和EMOKIT_PID的值是否相同。 – user2699113 2014-10-01 13:35:12

非常感謝。 – Moonwalker 2014-10-04 17:49:26

無法連接到Linux中的USB設備（Emotiv神經頭戴式耳機）

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