[Raspberry Pi] Dropping Connection RTL8188CUS

[zero13th]

Raspberry Pi ARM 2.99.2 (3.0 RC 2) using TP-Link TL-WN725N

root ~ # ifconfig wlan0 | grep drop
RX packets:4079 errors:0 dropped:4546 overruns:0 frame:0
TX packets:3021 errors:0 dropped:1 overruns:0 carrier:0
root ~ # lsmod | grep 8192
8192cu 525380 0
root ~ # lsusb | grep 8188
Bus 001 Device 005: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
root ~ # cat /sys/module/8192cu/parameters/rtw_power_mgnt
1
root ~ # dmesg | tail
[40641.639198] rtw_set_ps_mode(): Busy Traffic , Leave 802.11 power save..
[40641.639510] rtl8192c_set_FwPwrMode_cmd(): Mode = 0, SmartPS = 0
[40645.639722] rtw_set_ps_mode(): Enter 802.11 power save mode...
[40645.639767] rtl8192c_set_FwPwrMode_cmd(): Mode = 1, SmartPS = 2
[40663.371994] rtw_set_ps_mode(): Busy Traffic , Leave 802.11 power save..
[40663.372272] rtl8192c_set_FwPwrMode_cmd(): Mode = 0, SmartPS = 0
[40665.639173] rtw_set_ps_mode(): Enter 802.11 power save mode...
[40665.639217] rtl8192c_set_FwPwrMode_cmd(): Mode = 1, SmartPS = 2
[40691.020443] rtw_set_ps_mode(): Busy Traffic , Leave 802.11 power save..
[40691.020736] rtl8192c_set_FwPwrMode_cmd(): Mode = 0, SmartPS = 0
root ~ #

Please disable power-saving feature on RTL8188CUS
Thanks

additional info:
http://linux-sunxi.org/Wifi
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=26&t=6256&start=1125 (post by robert84 » Mon Nov 12, 2012 1:20 am)

[LossAngeles]

Perhaps done with a modprobe.d line. I'll see what I can find out. This power saving issue is annoying my Cisco router too.

[zero13th]

@LossAngeles, any update?

[LossAngeles]

I haven't had any issues with this since 2.99.4 and have not had time to pursue it since updating to that version.

[jenkins101]

Hi,

try this:

mkdir -p .config/modprobe.d
echo "options 8192cu rtw_power_mgnt=0" > .config/modprobe.d/8192cu.conf
reboot

this will not be added as default in OE at this time.
This driver is really unstable on some chips today.

[zero13th]

@LossAngeles and @jenkins101,
thank you for replying, marking as solved.