最近家里换成了百兆光纤，可是手机测速经常只是50 M，而安装Debian系统的笔记本无线测速仅仅是20M。请问是不是和网卡驱动有关系，或是别的原因？
我的网卡是Broadcom BCM4313。
lspci -k | grep Network
03:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)
Subsystem: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter
sudo ethtool -i wlan0
driver: wl0
version: 6.30.223.271 (r587334)
firmware-version:
expansion-rom-version:
bus-info:
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
sudo modinfo wl
filename: /lib/modules/4.7.0-1-amd64/updates/dkms/wl.ko
license: MIXED/Proprietary
license: MIXED/Proprietary
alias: pci:v*d*sv*sd*bc02sc80i*
depends: cfg80211
vermagic: 4.7.0-1-amd64 SMP mod_unload modversions
parm: passivemode:int
parm: wl_txq_thresh:int
parm: oneonly:int
parm: piomode:int
parm: instance_base:int
parm: nompc:int
parm: intf_name:string
sudo lshw -C network
*-network
description: Wireless interface
product: BCM4313 802.11bgn Wireless Network Adapter
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 01
serial: 2c:d0:5a:b2:10:ca
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) ip=192.168.3.53 latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:f4700000-f4703fff
[code]sudo iwconfig
eth0 no wireless extensions.
wlan0 IEEE 802.11 ESSID:"TP_LINK"
Mode:Managed Frequency:2.432 GHz Access Point: 94:77:2B:8D:C2:1C
Bit Rate=72 Mb/s Tx-Power=200 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=52/70 Signal level=-58 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
lo no wireless extensions.
[/code]
