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I have an HP ProBook 4431s.

After installing ubuntu 16.04 LTS, my WiFi is really slow so I have to use the LAN for now.

I tried the all the thread on Ubuntu where you select the realtek antenna after downloading Larry Finger's github repo.

My WiFi is still slow. I didn't see any improvements.

The output of ubuntu's wireless info is here:

https://paste.ubuntu.com/25350005/

I realized that my adapter was intel. After re-installing Ubuntu, the output is as follows:

https://paste.ubuntu.com/25353321/

FYI, I used to do dual boot between Windows 7 and ubuntu 12.04 LTS and everything was fine. This is due to the upgrade to 16.04 LTS.

Pilot6
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vineet sinha
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  • Your Ethernet is Realtek, your WiFi is Intel. Whatever you did, at best, has no effect but most likely made it worse. And you're connecting to an old b/g router so... –  Aug 19 '17 at 21:23
  • Your wireless adapter is the Intel. Please uninstall rtlwifi_new and reboot. Then give us a new paste. – chili555 Aug 19 '17 at 21:24
  • I added the new log. Also, the internet started working better at the time I was typing this so the results might be better than they actually are. It stops working in 5 minutes or so. – vineet sinha Aug 20 '17 at 08:59

3 Answers3

2

Run in a terminal

sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi 11n_disable=8"

and reboot.

Pilot6
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In your paste, we see several SSIDs named BELL101, including the one to which you are connected. I suspect that your wireless drops because it is attempting to roam to another instance of BELL101. If this is a router for which you have administrative access, I suggest that you rename it to, for example, BELL105 as it is a 5 gHz access point.

If you are unable to rename it, I suggest that you bind to the specific instance of BELL101 by MAC address, like this: Ubuntu connect drops. Worked for a while then started dropping again

chili555
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I tried a combination of the above two solutions:

1) Changed the name of the wifi from something generic like BELL101 to VINEET101

2)

sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi 11n_disable=1"

it got my internet speed from 0.3 Mbps tp 21 Mbps. It still doesn't go to 80-90 Mbps like it usually does but it is at least something I can work with. If you have any further ideas about how to increase this value, please let me know.

vineet sinha
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