[ 25.276153] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 25.544243] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 25.813298] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 26.080185] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 26.348173] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 26.616164] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 26.884141] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 27.152146] hub 4-0:1.0: unable to enumerate USB device on port 5 以前 squeeze 用 2.6 内核，冬天冷开机预热 30 秒就不会有该现象；夏天或热机重启绝不会有。 现在 wheezy 用 3.2.0 内核，无论冷热，启动前一定要在 grub 等足 30 秒才能避免次现象。
