Arch Linux

Markus00000

Member

Registered: 2011-03-27

Posts: 323

Intel Wi-Fi gets slower the longer a connection is up, no disconnects

Card: Intel Advanced-N 6205 using iwlwifi
Wi-Fi: WPA2, static IP
Kernel: 4.4.5

Problem: The longer a Wi-Fi connection is up, the higher the chance that it gets slow or comes to a halt. Sometimes it is already slow after boot. No disconnects occur. Reconnecting the Wi-Fi fixes the speed temporarily.

A typical connection might proceed like this:

1. Good connection, signal -70 dBm, bitrate 81 MBit/s

2. Time passes

3. Bitrate no longer passes 54 Mbit/s

4. Time passes

5. Signal no longer passes -75 dBm

6. Time passes

7. Connection comes to an almost complete halt with a signal of -79 dBm and 1 Mbit/s

8. Run `netctl restart my_wifi` to get the speed back

9. Repeat from step 1

Sometimes the signal or bitrate drops, sometimes both. Sometimes they do not drop at all but throughput is lowered to 300 KB/s or similar.

Reconnecting works reliably but might take several tries.

It does not seem to occur as often when near the access point.

Any help highly appreciated as it can happen 20 times a day...

Last edited by Markus00000 (2016-03-22 08:31:39)