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I have 5G internet connection. Speed is always between 200 - 300 Mbps. When I am downloading something and download speed goes above 150 Mbps, WiFi turn off. It doesn't even show available WiFis. Rebooting the system doesn't help. I have to shut down the system and start again. I researched and tried below solutions but unfortunately none worked.

  1. Restart network manager.
  2. Disable power management
  3. Disable 11n
  4. Uninstalled network-manager and installed WICD network manager
  5. Reinstalled Ubuntu 16.04

My system:
Lenovo Thinkpad P52.
Wireless Card: Intel Wireless AC 9560


Anybody faced same issue and have solution? I will really appreciate the help as I am trying to resolve this issue for last 1 month and it's driving me crazy.

Thanks


Update:

I changed the setting of IPv6 from Automatic to Ignore. It's been 24 hours now, WiFi has not turned off. I hope this is the solution.

Update: Wifi turned off after 10 hours. So, this is not the fix.


[Solved]

Updated the kernel to 5.1.3 using Ukuu Kernel Update Utility. It's been 2 days now since laptop is up and running and WiFi is not turned off. Noticed other things as well after updating the kernel. WiFi Signal is always 100% now. Earlier it was always between 80 - 90 percent. Also, boot time has reduced significantly.

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  • ` sudo journalctl -b 0 /usr/sbin/NetworkManager` will show interesting logs.
    – waltinator
    Mar 2, 2020 at 1:27
  • I see this twice, it is in red colour - "nm_device_get_device_type: assertion 'NM_IS_DEVICE (self)' failed". But logs are only for last 36 hours. Wifi turned off before that. I will try to download something and once it gets disconnected, I will run the command again. Mar 2, 2020 at 13:12
  • @waltinator Managed to reproduce the issue after reinstalling again. Here is the log - paste.ubuntu.com/p/PXxnVkz8fC. If you look at the last 2 lines, it seems disconnect happened after 2 hours. What seems to be the issue? Mar 3, 2020 at 11:16
  • @chili555 Will you be able to please help me with this? Mar 9, 2020 at 11:31
  • See what else your system is doing around that time: sudo journalctl --since="20-03-03 10:29:52" --until="20-03-03 05:28:52" (that's 10 minutes before the disconnect)
    – waltinator
    Mar 11, 2020 at 0:36

1 Answer 1

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[Solved]

Updated the kernel to 5.1.3 using Ukuu Kernel Update Utility. It's been 2 days now since laptop is up and running and WiFi is not turned off. Noticed other things as well after updating the kernel. WiFi Signal is always 100% now. Earlier it was always between 80 - 90 percent. Also, boot time has reduced significantly.

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