我最近在 12.04 上安装了 Ubuntu 13.10 双启动，现在两个发行版都无法识别 USB 设备。它识别出我有 USB 端口，但当我通过 USB 插入设备时，文件中没有任何显示。
EDIT: for dmesg | tail
[ 854.460876] raid6: sse2x2 747 MB/s
[ 854.528879] raid6: sse2x4 1087 MB/s
[ 854.528890] raid6: using algorithm sse2x4 (1087 MB/s)
[ 854.528898] raid6: using ssse3x2 recovery algorithm
[ 854.620728] bio: create slab <bio-1> at 1
[ 854.629208] Btrfs loaded
[ 1551.482251] systemd-hostnamed[13047]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
[ 2523.892113] perf samples too long (2519 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
[ 2591.888615] psmouse serio2: Touchpad at isa0060/serio2/input0 lost sync at byte 6
[ 2591.909739] psmouse serio2: Touchpad at isa0060/serio2/input0 - driver resynced.
For lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 064e:d251 Suyin Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
总线 002 是我的上网本内置的网络摄像头。我连接的任何设备都无法被 lsusb 识别。
答案1
我遇到过类似的问题。通过移除 USB 网络摄像头解决了这个问题。尝试拔下网络摄像头。已经过去几个月了，所以我记不清具体细节了，但结果是内核升级破坏了对我使用的网络摄像头的支持。尝试使用该网络摄像头会导致整个 USB 子系统出现问题。