这种情况发生在运行 Debian 9 的 Owasys 微控制器上，昨天我设法打开 Wi-Fi，但今天它可以工作，但未列出连接。
lsmod 返回其中包含 mlan0 的设备列表
Module Size Used by
musb_dsps 20480 0
musb_hdrc 98304 1 musb_dsps
udc_core 28672 1 musb_hdrc
usbcore 204800 1 musb_hdrc
phy_am335x 16384 2
phy_am335x_control 16384 1 phy_am335x
phy_generic 16384 1 phy_am335x
usb_common 16384 5 phy_am335x,udc_core,musb_hdrc,musb_dsps,usbcore
c_can_platform 16384 0
c_can 20480 1 c_can_platform
mcp251x 20480 0
snd_soc_tlv320aic31xx 36864 1
can_dev 24576 2 mcp251x,c_can
musb_am335x 16384 0
omap_wdt 16384 0
sd8xxx 552960 0
mlan 430080 1 sd8xxx
cfg80211 266240 1 sd8xxx
ppp_generic 36864 0
slhc 16384 1 ppp_generic
owa4x_gpio 16384 0
ip_tables 24576 0
x_tables 32768 1 ip_tables
但iwconfig -a没有列出 mlan0，这是昨天列出的
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.8.244 netmask 255.255.255.0 broadcast 192.168.8.255
inet6 fe80::eb2:b7ff:fed8:9bd6 prefixlen 64 scopeid 0x20<link>
inet6 fdf4:7177:49ee:0:eb2:b7ff:fed8:9bd6 prefixlen 64 scopeid 0x0<global>
ether 0c:b2:b7:d8:9b:d6 txqueuelen 1000 (Ethernet)
RX packets 456 bytes 40141 (39.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 346 bytes 59107 (57.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 51
eth0:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.1 netmask 255.255.255.0 broadcast 0.0.0.0
ether 0c:b2:b7:d8:9b:d6 txqueuelen 1000 (Ethernet)
device interrupt 51
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
这就是我跑步时得到的结果dmesg
[ 5.939860] mlan: loading out-of-tree module taints kernel.
[ 6.398869] systemd-journald[107]: Received request to flush runtime journal from PID 1
[ 6.418469] wlan: Loading MWLAN driver
[ 6.480709] wlan: Driver loaded successfully
我怀疑loading out-of-tree module taints kernel可能是一个问题，但我不知道如何进一步进行。