Improve wifi stability

[Boern]

I found out that the wifi stability improves greatly when you disable power management.

Just add

Code:

options 8723cs rtw_power_mgnt=0

to the file /etc/modprobe.d/8723cs.conf and reload the module or reboot.

[jfloren]

Thank you, I'll give this a try tonight and see if it helps keep my wifi up when I'm connecting via SSH.

[Boern]

I guess it does the same as the below command:

Code:

sudo iw dev wlan0 set power_save off

Nope, I had tried the iw command earlier and it did not help.

[pfeerick]

Interesting...

By default, it seems to be set to 2, so I wonder what values it supports, and what the other options are.

Code:

cat /sys/module/8723cs/parameters/rtw_power_mgnt

If it's the same as the same as the Realtek RTL8192 chipset driver... it'll be:

rtw_power_mgnt

• 0 = disable power saving
  
• 1 = power saving on, minPS
  
• 2 = power saving on, maxPS
  

And doing a

Code:

echo 0 | sudo tee /sys/module/8723cs/parameters/rtw_power_mgnt

looks like it *should* allow real-time control of that parameter (can't check atm as I don't have ssh access to my pinephone and typing terminal commands on a phone touchscreen is... painful). If it does work, it might be handy to shove in a script so you have have power saving when you want to prolong the battery or switch it off to get a more reliable wifi link.

It seems like

Code:

rtw_enusbss
rtw_ips_mode

may be worth playing with/zeroing also.

[jfloren]

Update: No, it didn't seem to help my phone at all. I still get frequent multi-second pauses over wifi. I'm looking into doing network over USB and I guess I'll bug the pinephone support guys to see if they can get me a new wifi board or something