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[ 1.284699] Console: switching to colour frame buffer device 100x30
[ 1.324420] sun4i-drm display-engine: fb0: frame buffer device
[ 1.331595] [drm] Initialized sun4i-drm 1.0.0 20150629 for display-engine on minor 0
[ 1.340830] usb_phy_generic usb_phy_generic.0.auto: usb_phy_generic.0.auto supply vcc not found, using dummy regulator
[ 1.352902] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
[ 1.358838] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 1
[ 1.369202] hub 1-0:1.0: USB hub found
[ 1.373142] hub 1-0:1.0: 1 port detected
[ 1.378899] using random self ethernet address
[ 1.383438] using random host ethernet address
[ 1.389845] usb0: HOST MAC 4e:3f:d1:70:7c:be
[ 1.394239] usb0: MAC 46:a5:51:3c:02:89
[ 1.398226] g_cdc gadget: CDC Composite Gadget, version: King Kamehameha Day 2008
[ 1.405819] g_cdc gadget: g_cdc ready
[ 1.410550] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 1.428306] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 1.435240] vcc3v3: disabling
[ 1.438229] ALSA device list:
[ 1.441289] #0: Loopback 1
[ 1.445103] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 1.453865] cfg80211: failed to load regulatory.db
[ 1.562391] random: crng init done
[ 2.123660] jffs2: notice: (1) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[ 2.143662] VFS: Mounted root (jffs2 filesystem) on device 31:3.
[ 2.152372] devtmpfs: mounted
[ 2.162408] Freeing unused kernel memory: 1024K
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Initializing random number generator: OK
Saving random seed: OK
Starting network: OK

Welcome to Buildroot
buildroot login:

请问哪位知道这个 是什么导致的，输入 后一直没有任何反应。