#18539: RTL8192cu driver stability issues
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Reporter: thewerthfam@… | Owner: developers
Type: defect | Status: new
Priority: high | Milestone: Chaos Calmer (trunk)
Component: kernel | Version: Trunk
Keywords: kernel driver rtl8192 |
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Using a RTL8192cu USB wifi dongle with openwrt r43567. There are a few
different situations that make the driver not entirely reliable.
1) some clients don't maintain connections for long periods of time
(Suually on less than 15 min). When they loose connection the wifi on the
client appears connected still but not traffic will flow. Other clients
(HP cromebook) stays connected and passes traffic even while the other
client is having problems connecting. The problem client is unable to
reconnect till the AP is rebooted. The problem client is a compaq running
Ubuntu 14 LTS. Running wifi for years on other access points with no
issues. Another problem client is a HP office jet wifi printer- same
behaviour as the compaq laptop.
2) some clients are unable to connect to the rtl8192cu powered access
point at all. This is a visio 24" smart TV. (Though that same device was
able to connect and worked fine when the access point was using the ath9k
based usb wifi dongle and same wireless mode and security settings.
3) a thinkpad client running ubuntu 14 with an open connection to the ap
status page also maintains a connection with out issue.
Reason for using this adapter is that it appears from the openwrt wiki
documents it should allow up to 25 clients. As the ath9k based usb card
only allows max of 7.
While researching this issue I've come across other people having problems
with the seemingly older rtl8192cu driver.
http://blog.stuffedcow.net/2014/04/rtl8192cu-and-linux-3-13-10/ Not sure
if there is a new driver that can be pulled into the trunk or a patch.
Below is the relevant wifi settings. If there are specific wireless
settings that fix this issue that would be great. I interested in most
flexability for various clients to connect to a stable connection vs best
possible wifi speed. I have tried different wifi security settings WPA,
WPA2, auto cipher, aes cipher and non seem to make a difference.
config wifi-device radio0
option type mac80211
option channel 11
option hwmode 11gn
option path 'soc.3/1c1c000.usb/usb2/2-1/2-1:1.0'
option htmode 'HT20'
list ht_capab 'SHORT-GI-20'
list ht_capab 'SHORT-GI-40'
list ht_capab 'RX-STBC1'
list ht_capab 'DSSS_CCK-40'
option txpower '20'
option country 'US'
option channel '1'
config wifi-iface
option device 'radio0'
option mode 'ap'
option ssid 'BananaPi'
option key '<password>'
option network 'lan'
option encryption 'psk+ccmp'
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Ticket URL: <https://dev.openwrt.org/ticket/18539>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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