I've bought a new notebook with rtl8723ae wifi chip (or at least it looks like)
$ lspci | grep RTL 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723AE PCIe Wireless Network Adapter
Windows also shows rtl8723ae in the device manager.
At the moment, I have windows 7 and ubuntu 13.04 installed.
When I use wifi with windows booted, everything goes ok, router shows stable signal about -60 dBm and link speed 135-150 Mbit/s. Download speed seems OK.
But when I am in ubuntu with the same distance/walls to the router, download speed jumps from 0 to good, router shows signal ~ -80 dBm (with the same notebook vs router placement!) and link speed jumping randomly from 1 mbps to ~54 mbps.
Stable link with 135-150 mbps and signal -60 dBm under ubuntu is achievable only with the notebook at a 30 cm distance to router. Any longer distance or my body between the router and notebook drops signal dramatically.
iwconfig reports txpower 20 dBm:
$ iwconfig eth1 no wireless extensions. lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"ZyXEL_KEENETIC_LITE_3EFA9B" Mode:Managed Frequency:2.457 GHz Access Point: C8:6C:87:3E:FA:9B Bit Rate=150 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr=2347 B Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-14 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:28819 Missed beacon:0
Reducing it to 0 dBm with
sudo iwconfig wlan0 txpower 0 seem to have no effect.
Signal level reported by
iwconfig seem to jump randomly from -90 to +15 dBm (or even once maybe I've seen +26 dBm, not sure).
At a close distance (~30 cm)
iwconfig reportes -30 dBm most of the time, but sometimes jumps to something ramdom (+10 dBm, -70 dBm, -90 dBm... )
Also, at a longer distance -60 dBm seems to be more likely to be reported by
iwconfig, but random jumps are more often and it's hard to say for sure.
Everything seems like a transmitter power or signal correctness problem. But in windows everything goes OK.
May be, the driver does not work with the chip correctly, but works somehow.
The kernel module rtl8723ae seems to be loaded:
$ lsmod | grep rtl87 rtl8723ae 86459 0 rtlwifi 79673 1 rtl8723ae
It there anything I can do with this? The notebook was bought for use with ubuntu mainly, but with such a wifi it is not quite usable =(