I have a realtek wifi card which is really messing up the internet connection on my laptop. As per a few launchpad bugs,they have suggested to disable msi and powersave. How do I set the parameters msi, swlps, ips and fwlps? details of the wifi card driver is below.
modinfo rtl8723be filename: /lib/modules/3.16.3-031603-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko firmware: rtlwifi/rtl8723befw.bin description: Realtek 8723BE 802.11n PCI wireless license: GPL author: Realtek WlanFAE <> author: PageHe <> srcversion: 8630CF9344D90D47240D1FF alias: pci:v000010ECd0000B723sv*sd*bc*sc*i* depends: rtlwifi,rtl_pci,btcoexist,mac80211 vermagic: 3.16.3-031603-generic SMP mod_unload modversions parm: swlps:bool parm: swenc:using hardware crypto (default 0 [hardware]) (bool) parm: ips:using no link power save (default 1 is open) (bool) parm: fwlps:using linked fw control power save (default 1 is open) (bool) parm: msi:Set to 1 to use MSI interrupts mode (default 0) parm: debug:Set debug level (0-5) (default 0) (int) parm: disable_watchdog:Set to 1 to disable the watchdog (default 0) (bool) Wireless card
lspci | grep -i wire 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter if I set msi=0 i get the following error
[ 18.096063] rtl8723be: unknown parameter 'msi' ignored 3 Answers
Regarding your question for how to set parameters, you could use something like (=0 meaning disable, =1 meaning enable, and as Sneetsher mentions msi is disabled by default): $ echo "options rtl8723be fwlps=0 ips=0" | sudo tee /etc/modprobe.d/rtl8723be.conf
Regarding your WiFi problem, you could check out my answer to the question My wifi drops the connection after a few minutes realtek8723be
Before you start, you will need to install sysfsutils:
sudo apt-get update sudo apt-get install sysfsutils First, to show the options that are currently in use and the existing parameters, run the following command:
sudo systool -a -v -m rtl8723be | grep -A8 "Parameters:" Under "Parameters:", you will see the available options and the existing parameters. Here is an example of that section:
Parameters: debug = "1" disable_watchdog = "N" fwlps = "Y" ips = "Y" msi = "Y" swenc = "N" swlps = "N" It appears that the msi option can be set to Y or N.
To set msi to off, you should run the following commands:
sudo modprobe -r rtl8723be sudo modprobe rtl8723be msi=N Now, verify the change:
sudo systool -a -v -m rtl8723be | grep -A8 "Parameters:" The output should now look like this:
Parameters: debug = "1" disable_watchdog = "N" fwlps = "Y" ips = "Y" msi = "N" swenc = "N" swlps = "N" To make this change permanent, you should create a file /etc/modprobe.d/rtl8723be.conf. Run the following command:
sudo nano /etc/modprobe.d/rtl8723be.conf Now, copy and paste the following into the file:
options rtl8723be debug=1 options rtl8723be disable_watchdog=N options rtl8723be fwlps=Y options rtl8723be ips=Y options rtl8723be msi=N options rtl8723be swenc=N options rtl8723be swlps=N Press CTRL + o and then press ENTER to save the file. Press CTRL + x to exit nano.
Now you can make changes to this file to apply your desired settings. After you make changes to the file, run the following commands to apply the changes:
sudo modprobe -r rtl8723be sudo modprobe rtl8723be I'm using Ubuntu 14.04 with 14.10 kernel. It does work for me.
~$ sudo modprobe rtl8723be msi=0 ~$ more /sys/module/rtl8723be/parameters/msi N ~$ sudo modprobe -r rtl8723be ~$ sudo modprobe rtl8723be msi=1 ~$ more /sys/module/rtl8723be/parameters/msi Y Same module version:
~$ modinfo rtl8723be filename: /lib/modules/3.16.0-23-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko firmware: rtlwifi/rtl8723befw.bin description: Realtek 8723BE 802.11n PCI wireless license: GPL author: Realtek WlanFAE <> author: PageHe <> srcversion: C94095C986767A931B924EF Default is 0 for msi so no need for it, but you should for ips=0 fwlps=0
Try with both modprobe or insmod.
