首先检查有没有物理的 wifi 开关。 wifi 开关关了,蓝牙也肯定关了,它俩一般共用一个物理开关。如果没有,或者有但打开还是找不到适配器。用这个命令试试 rfkill list ,我这里的输出是这样的:
1: phy1: Wireless LAN
Soft blocked: yes
Hard blocked: no
9: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
10: phy5: Wireless LAN
Soft blocked: yes
Hard blocked: no
你应该懂了。可以用 rfkill unblock all 打开。没有 rfkill 命令的话你还要先去装,包名好像就叫 rfkill 。
还不行就要看看是否真的有这个设备。用 lspci 看看是否有 Network controller ,这个一般是无线网卡。用 lsusb 看看是不是有 broadcom 的设备,如果有,几乎肯定是蓝牙。这样的话最终很可能缺少一个固件。我帮你 google 下,看到这个
http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=Y24FF , 下载解包里面都是驱动:
debs/
debs/fglrx_12.100-0ubuntu1_amd64.deb
debs/main/
debs/main/pulseaudio-patch-salado_1.0_all.deb
debs/main/oem-audio-hda-daily-lts-quantal-dkms_0.201305151525~precise1_all.deb
debs/main/oem-power-sata-alpm_1.0simerville1_all.deb
debs/main/intel-i915-backport-3.8-dkms_3.8.6.0_all.deb
debs/oem-bt-dw1601-dkms_0.2_all.deb
debs/fglrx-amdcccle_12.100-0ubuntu1_amd64.deb
debs/glidepoint_3.6-13_amd64.deb
debs/fglrx-dev_12.100-0ubuntu1_amd64.deb
debs/oem-sdcard-o2micro-dkms_1.0_all.deb
debs/ethernet-suspend-modules-e1000e_0.2_all.deb
debs/oem-wireless-bluetooth-intel-7260-dkms_3.10.20130828_amd64.deb
debs/bcmwl-kernel-source_6.30.223.30+bdcom-0ubuntu1~ppa1_amd64.deb
factory/
prepackage.dell
preseed/
preseed/dell-recovery.seed
scripts/
scripts/chroot-scripts/
scripts/chroot-scripts/fish/
scripts/chroot-scripts/fish/
05-gfx-fglrx.shscripts/chroot-scripts/fish/95-pcie_aspm
scripts/chroot-scripts/fish/
12-glidepoint_3.6-13_amd64.shscripts/chroot-scripts/fish/90-add-bluetooth-restart-workaround
scripts/chroot-scripts/os-post/
scripts/chroot-scripts/os-post/
05-gfx-fglrx.sh和无线 /蓝牙有关的是这几个
bcmwl-kernel-source_6.30.223.30+bdcom-0ubuntu1~ppa1_amd64.deb
oem-wireless-bluetooth-intel-7260-dkms_3.10.20130828_amd64.deb
oem-bt-dw1601-dkms_0.2_all.deb
如果你的本子是 broadcom 的卡,应该用 bcmwl 或 dw1601 但这些在 centos7 里面肯定都有了,会自动加载,所以到这里,很可能是 intel 的 7260 ,这个卡如果没有 firmware 是起不来的,可以到这里下载:
http://linuxwireless.org/en/users/Drivers/iwlwifi/#Firmware ,解压放 /lib/firmware ,重启。应该可以看到 wifi 和蓝牙了吧,还看不到就 rfkill list 再看看...