ubuntu wifi模块调试记录

lspci
/etc/modprobe.d/iwlwifi.conf得知模块名
uname -a得知核心
/lib/modules/4.8.0-46-generic/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko 确认模块名
modinfo iwlwifi查看相关参数

/etc/modprobe.d/iwlwifi.conf内容 :

remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

modinfo mac80211可以查看横块内容

第二天发现有同样的问题:

I had a big issue with the wireless speed connection on my Lenovo TP 410i and its Intel wirelesss 1000n board. In Ubuntu's wireless network configuration menu I always get 1Mbps connection and Internet speed test was always poor -obviously- I follow following instructions and it automatically changed to 54Mbps and Internet speed test result was much better.

T410i:~$ sudo rmmod iwldvm
T410i:~$ sudo rmmod iwlwifi
T410i:~$ sudo modprobe iwlwifi 11n_disable=1

I don't know what all of that stuff does but it worked for me under Ubuntu 16.04.

 

solve:

The best solution that worked for me (in Ubuntu 16.04LTS) is to change the value of wifi.powersave located in /etc/NetworkManager/conf.d/default-wifi-powersave-on.conffrom 3 (enabled) to 2 (disabled).

This effectively makes the effects of sudo iwconfig <interface> power off permanent.

最后发现4.13.0的内核有问题，缷载后安装4.10.0-42-generic就可以了