我今天遇到了将一些实验室设备连接到我过去工作的计算机的问题。通过 USB 连接，但我无法像往常一样看到 /dev/ttyACM0。/dev/ttyUSB 也不见了。
这是 dmesg 的输出：
[ 337.762259] usb 2-2: new full-speed USB device number 9 using xhci_hcd
[ 342.875314] usb 2-2: device descriptor read/64, error -110
[ 389.345548] usb usb2-port2: unable to enumerate USB device
我最初认为这是一个权限问题，但我现在倾向于 USB 配置或串行访问的问题。尽管如此，我仍然是一个菜鸟，如果有人对此有建议或调试技术，将不胜感激！
我正在运行 Ubuntu 4.4.0-112-generic
将内核从 112 升级到 116 后，我的无线出现问题。我尝试重新安装 bcmwl-kernel-source 并将 gcc 更新到 5.4.1，但无济于事。即使重新启动到 112，我也失去了无线（以前重新安装 bcmwl-kernel-source 对我有用）
似乎 bcmwl-kernel-source 的重新安装运行良好，直到我收到此错误的 modprobe 阶段：
modprobe: ERROR: could not insert 'wl': Exec format error
我可以通过以下命令复制它：
sudo modprobe wl
我认为 wl 模块存在问题，并且 dmesg 中 wl 的 grep 显示：
wl: version magic '4.4.0-116-generic SMP mod_unload modversions ' should be '4.4.0-116-generic SMP mod_unload modversions retpoline '
我对 ubuntu 相当陌生，不知道如何解决这个问题，所以我绝对可以使用一些帮助。
这是 lshw -C 网络的输出
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not
upgraded.
Need to get 0 B/1,544 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 396824 files and directories currently
installed.)
Preparing to unpack .../bcmwl-kernel-source_6.30.223.271+bdcom-
0ubuntu1~1.2_amd64.deb ...
Removing all DKMS Modules
rmdir: failed to remove '': No such file or directory
Done.
Unpacking bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~1.2) over
(6.30.223.271+bdcom-0ubuntu1~1.2) ...
Setting up bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~1.2) ...
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
Building only for 4.4.0-116-generic
Building for architecture x86_64
Building initial module for 4.4.0-116-generic
Done.
wl:
Running module version sanity check.
Good news! Module version for wl.ko
exactly matches what is already found in kernel 4.4.0-116-generic.
DKMS will not replace this module.
You may override by specifying --force.
depmod....
DKMS: install completed.
modprobe: ERROR: could not insert 'wl': Exec format error
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.122ubuntu8.11) ...
update-initramfs: Generating /boot/initrd.img-4.4.0-116-generic
这是modinfo：
modinfo wl | grep vermagic
vermagic: 4.4.0-116-generic SMP mod_unload modversions