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I took apart the computer to upgrade some hardware, but afterwards I cannot connect to wifi.

OS: Ubuntu 18.04

CPU: Intel Celeron N3350

Image

enter image description here

Output of nmcli device show

> GENERAL.DEVICE:                         lo
> 
> GENERAL.TYPE:                           loopback
> 
> GENERAL.HWADDR:                         00:00:00:00:00:00
> 
> GENERAL.MTU:                            65536
> 
> GENERAL.STATE:                          10 (unmanaged)
> 
> GENERAL.CONNECTION:                     --
> 
> GENERAL.CON-PATH:                       --
> 
> IP4.ADDRESS[1]:                         127.0.0.1/8
> 
> IP4.GATEWAY:                            --
> 
> IP6.ADDRESS[1]:                         ::1/128
> 
> IP6.GATEWAY:                            --

output of lspci -nnk | grep 0280 -A3

02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]

Subsystem: Lenovo RTL8821CE 802.11ac PCIe Wireless Network Adapter [17aa:c024]
Russell356
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  • what is the output of nmcli device show from the terminal? – PRATAP Jun 13 '19 at 12:10
  • Edited in post. – Russell356 Jun 13 '19 at 12:12
  • seems to be drivers problem.. from the output sys didt find wifi adapter.. – PRATAP Jun 13 '19 at 12:37
  • did it inserted properly? do you have live USB.. try with it to confirm drivers problem or hardware.. – PRATAP Jun 13 '19 at 12:38
  • i think you may not have plugged every ribbon back in correctly :https://www.techwalla.com/articles/how-to-remove-a-ribbon-cable-connector – tatsu Jun 13 '19 at 13:30
  • It appears that the screw that holds down the wireless card and which appears to also provide an electrical ground (notice the copper trace) is missing. Did you have a screw left over after you upgraded the hardware? Please find and replace the screw and then check: lspci -nnk | grep 0280 -A3 Welcome to Ask Ubuntu. – chili555 Jun 13 '19 at 13:33
  • I edited it in. – Russell356 Jun 14 '19 at 02:27
  • What about the screw? – chili555 Jun 15 '19 at 13:14
  • In Ubuntu 18.04, the driver must be compiled from source code: Please see: https://askubuntu.com/questions/1070593/lenovo-thinkpad-e480-no-wifi-adaptor-found-in-ubuntu-18-04/1070645#1070645 – chili555 Jun 15 '19 at 15:38

0 Answers0