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Laptop won't recognise wifi card anymore

Wireless with WEP extremely slow on an Acer Timeline 4810T with a Centrino Wireless-N 1000Slow wireless with an Intel 4965Lenovo IdeaPad z570 wireless adapter isn't working properly in Ubuntu 12.04Fixed wireless then bluetooth stopped workingCan't connect wifi with Intel AC 7265 on Ubuntu 15.10, Asus ZenBook UX305New HP Spectre x360 Wifi Not Working using Intel 8265 CardWifi stopped working 16.10Ubuntu 17.10 WiFi is excruciatingly slow (Lenovo W540 Laptop, iwlwifi driver)Wireless Internet Issues - Intel Wireless, Ubuntu 18.04WiFi stopped working (DISABLED) in Ubuntu 18.04 on ThinkPad P70

0

Laptop model: Dell latitude E6420
Ubuntu version: 18.04.2 LTS

My wifi was working completely fine up until last night. Now, my laptop says "no wifi adapter found" and therefore won't let me connect. I've tried turning the power off and restarting it many times. I have tried some suggestions that I've found on here and none of them work.

However my computer is recognising the card as it shows up when I use lshw -C network and lspci. It shows up in the terminal but the setting application says it's not there. (I was going to add the output but I don't have enough reputation to add images here yet.)

What can I do?

Thanks.

intel-wireless

share|improve this question

edited 4 hours ago

SJMcMullan

asked 5 hours ago

SJMcMullanSJMcMullan

11

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add a comment | 

0

Laptop model: Dell latitude E6420
Ubuntu version: 18.04.2 LTS

My wifi was working completely fine up until last night. Now, my laptop says "no wifi adapter found" and therefore won't let me connect. I've tried turning the power off and restarting it many times. I have tried some suggestions that I've found on here and none of them work.

However my computer is recognising the card as it shows up when I use lshw -C network and lspci. It shows up in the terminal but the setting application says it's not there. (I was going to add the output but I don't have enough reputation to add images here yet.)

What can I do?

Thanks.

intel-wireless

share|improve this question

edited 4 hours ago

SJMcMullan

asked 5 hours ago

SJMcMullanSJMcMullan

11

New contributor

SJMcMullan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

Laptop model: Dell latitude E6420
Ubuntu version: 18.04.2 LTS

My wifi was working completely fine up until last night. Now, my laptop says "no wifi adapter found" and therefore won't let me connect. I've tried turning the power off and restarting it many times. I have tried some suggestions that I've found on here and none of them work.

However my computer is recognising the card as it shows up when I use lshw -C network and lspci. It shows up in the terminal but the setting application says it's not there. (I was going to add the output but I don't have enough reputation to add images here yet.)

What can I do?

Thanks.

intel-wireless

share|improve this question

edited 4 hours ago

SJMcMullan

asked 5 hours ago

SJMcMullanSJMcMullan

11

New contributor

SJMcMullan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 4 hours ago

SJMcMullan

asked 5 hours ago

SJMcMullanSJMcMullan

11

New contributor

SJMcMullan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 4 hours ago

SJMcMullan

asked 5 hours ago

SJMcMullanSJMcMullan

11

New contributor

SJMcMullan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 5 hours ago

SJMcMullanSJMcMullan

11

New contributor

SJMcMullan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 5 hours ago

SJMcMullanSJMcMullan

11

1 Answer
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There have been reports of people having problems when moving from the 4.15 to 4.18 Linux kernel with some Dell hardware. You'll want to manually downgrade your Linux kernel, the easiest way to do that is using the Ubuntu Update Kernel Utility (UKUU)

sudo add-apt-repository ppa:teejee2008/ppa

sudo apt update

sudo apt-get install ukuu

Now launch the ukuu app and select one of the 4.15 kernels to downgrade to.

share|improve this answer

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will try and find an Ethernet cable somewhere and attempt this.
  
  – SJMcMullan
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can also try rebooting and holding Shift and you may have a 4.15 kernel installed still.
  
  – Kristopher Ives
  4 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Now it's not connecting via ethernet either.
  
  – SJMcMullan
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Have you tried rebooting with an old kernel by holding Shift when the PC starts up?
  
  – Kristopher Ives
  1 hour ago
  

  
  
  
  

add a comment | 

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0

There have been reports of people having problems when moving from the 4.15 to 4.18 Linux kernel with some Dell hardware. You'll want to manually downgrade your Linux kernel, the easiest way to do that is using the Ubuntu Update Kernel Utility (UKUU)

sudo add-apt-repository ppa:teejee2008/ppa

sudo apt update

sudo apt-get install ukuu

Now launch the ukuu app and select one of the 4.15 kernels to downgrade to.

share|improve this answer

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will try and find an Ethernet cable somewhere and attempt this.
  
  – SJMcMullan
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can also try rebooting and holding Shift and you may have a 4.15 kernel installed still.
  
  – Kristopher Ives
  4 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Now it's not connecting via ethernet either.
  
  – SJMcMullan
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Have you tried rebooting with an old kernel by holding Shift when the PC starts up?
  
  – Kristopher Ives
  1 hour ago
  

  
  
  
  

add a comment | 

0

There have been reports of people having problems when moving from the 4.15 to 4.18 Linux kernel with some Dell hardware. You'll want to manually downgrade your Linux kernel, the easiest way to do that is using the Ubuntu Update Kernel Utility (UKUU)

sudo add-apt-repository ppa:teejee2008/ppa

sudo apt update

sudo apt-get install ukuu

Now launch the ukuu app and select one of the 4.15 kernels to downgrade to.

share|improve this answer

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will try and find an Ethernet cable somewhere and attempt this.
  
  – SJMcMullan
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can also try rebooting and holding Shift and you may have a 4.15 kernel installed still.
  
  – Kristopher Ives
  4 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Now it's not connecting via ethernet either.
  
  – SJMcMullan
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Have you tried rebooting with an old kernel by holding Shift when the PC starts up?
  
  – Kristopher Ives
  1 hour ago
  

  
  
  
  

add a comment | 

There have been reports of people having problems when moving from the 4.15 to 4.18 Linux kernel with some Dell hardware. You'll want to manually downgrade your Linux kernel, the easiest way to do that is using the Ubuntu Update Kernel Utility (UKUU)

sudo add-apt-repository ppa:teejee2008/ppa

sudo apt update

sudo apt-get install ukuu

Now launch the ukuu app and select one of the 4.15 kernels to downgrade to.

share|improve this answer

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525

sudo add-apt-repository ppa:teejee2008/ppa

sudo apt update

sudo apt-get install ukuu

share|improve this answer

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525

answered 4 hours ago

Kristopher IvesKristopher Ives

2,83111525