2

I just installed Debian 8 the other day and initially had wifi dropping and not being able to reconnect without a reboot. After trying options like making sure power management was off, I cannot even connect to wifi on reboot, however.

The following posts are very similar, and I used them as a starting point, though could not see through to a resolution because of errors: rtl8821ae Wifi driver

rtl8812ae Wifi Connection Instability in Debian Jessie

jj@hostname:~$ uname -v
#1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19)
jj@hostname:~$ lspci -vnn | grep Network
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter [10ec:8821]
jj@hostname:~$ sudo iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"dd-wrt"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: E8:DE:27:F9:85:9E   
          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=70/70  Signal level=-12 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

eth0      no wireless extensions.

I followed the instructions to add "non-free" components and realtek firmware, but was unable to install linux-headers-generic

Package linux-headers-generic is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

    E: Package 'linux-headers-generic' has no installation candidate

I confirmed the driver:

~# modprobe rtl8821ae

I did intall build-essentials and linux-headers-3.16.0-4-amd64, however. I installed wpa_supplicant, updated the .conf file as indicated, however:

~$sudo ifup wlan0
Unknown interface wlan0

~$ sudo /etc/init.d/networking restart
[ ok ] Restarting networking (via systemctl): networking.service.

~$ sudo dhclient wlan0

This just leaves 'wifi' saying 'connecting' without ever connecting.

Not sure what else to do. I had a different OS on this computer until yesterday and didn't have any connectivity issues, other machines are connected to wifi without any problems, so I don't believe it is an issue of the router or channel. Also:

root@hostname:/home/jj/# iwconfig wlan0 power off
Error for wireless request "Set Power Management"(8B2C) :
    SET failed on device wlan0 ; Operation not supported.

just in case:

~# journalctl -u NetworkManager
...
<warn> interfaces file /etc/network/interfaces.d/* doesn't exist
...

UPDATE: My wifi connection is through an access point wifi router connected to another wifi router. I think the connection issue had to do with some settings there. I reset the AP wifi router and started from scratch, and am able to connect now. The only issue I have now is that if I plug into an ethernet connection, it will not return to a wifi connection after unplugging it unless I reboot. Will hunt around for a solution or post another question.

1

Use iw to turn off the Power Management :

iw dev wlan0 set power_save off

To query the current power save settings you can use:

iw dev wlan0 get power_save
  • Thanks, I tried this, but it didn't connect. I believe power_save was off already though. I followed up the command with ~$ sudo /etc/init.d/networking restart [ ok ] Restarting networking (via systemctl): networking.service. ~$ sudo dhclient wlan0 – debby Nov 7 '16 at 16:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.