I just added a D-Link DWA-582 PCI-e WiFi adapter using the Realtek RTL8812AE chipset. I confirmed the support for the chipset at https://wiki.debian.org/rtl819x#rtl8821ae . I have installed the Realtek firmware using
apt-get install firmware-realtek and confirmed that it is in use using
modprobe rtl8821aeWhen I connect to the wireless access point I can maintain a connection for ~6 seconds. I usually am connected just long enough to establish a dhcp lease and then the network disconnects again. I have not been very successful in finding much information on how to diagnose/resolve this issue despite several hours of reading forum posts and trying suggestions.
I have tried replacing Network Manager with wicd without any change or improvement.
I am not really sure what the best information is for diagnosing this issue, so I have posted something to get started, and I hope all you guru's will want more and/or have some ideas and solutions!
Wireless Info tool output http://pastebin.com/Dd7igCqb
root@pink-fluffy-unicorn:~# uname -v #1 SMP Debian 3.16.7-ckt20-1+deb8u3 (2016-01-17)
root@pink-fluffy-unicorn:~# lspci | grep Network 04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8812AE 802.11ac PCIe Wireless Network Adapter (rev 01)
root@pink-fluffy-unicorn:~# apt-get install firmware-realtek Reading package lists... Done Building dependency tree Reading state information... Done firmware-realtek is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@pink-fluffy-unicorn:~# modprobe rtl8821ae root@pink-fluffy-unicorn:~#
root@pink-fluffy-unicorn:~# iwconfig eth0 no wireless extensions. wlan0 IEEE 802.11abgn ESSID:"WLAN-927602" Mode:Managed Frequency:2.462 GHz Access Point: 94:4A:0C:DF:A5:BB Bit Rate=1 Mb/s Tx-Power=20 dBm Retry short limit:7 RTS thr=2347 B Fragment thr:off Encryption key:off Power Management:off Link Quality=62/70 Signal level=-48 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 lo no wireless extensions.
journalctl -u NetworkManager
journalctl -u wpa_supplicant
Following the suggestion from GAD3R I tried to disable power management using
iwconfig with the following results:
root@pink-fluffy-unicorn:~# iwconfig wlan0 power off Error for wireless request "Set Power Management" (8B2C) : SET failed on device wlan0 ; Operation not supported.
I then enabled power management using
modprobe rtl8821ae swlps=1 to power management and then ran
iwconfig wlan0 power off again, which executed without error. I then confirmed that power management was disabled using
iwconfig wlan0 and monitored the output from
journalctl -f. There did not appear to be any change from the altered configuration (I also tried
iwconfig wlan0 power on to see if there was any change/improvement but it did not appear to have any significant impact)