No wifi in 4.13.0-41-generic

[Richard Bowker]

Wifi adapter not showing since upgrading to 4.13.0-41-generic, still works fine if i roll back to 4.13.0-39-generic.

Ubuntu 16.04

adapter details

  *-network
       description: Wireless interface
       product: RTL8192CE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: wlp1s0
       version: 01
       serial:
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1770108

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Robert Harrelsons (bobharrelsons)]

I am facing this same problem with 4.13.0-41-generic as well as 4.13.0-43-generic. When I boot in either of those kernels, I first get a black screen with a dialog box saying: "The system is running in low-graphics mode - your screen, graphics card, and input device settings could not be detected correctly. You will need to configure these yourself."

When I click OK, it gives another dialog box where I choose "Try running with default graphical mode". Then Ubuntu Desktop boots properly, but the network (wireless) symbol is there but empty. No network connection.

I tried disabling Networking or Wi-fi, and enabling them again, but nothing changes.

I have attached the output of the apport-collect 1770108 run on a terminal. I ran the command on the 4.13.0-43-generic kernel first, and then rebooted into 4.13.0-39-generic kernel and ran it again. In the 4.13.0-43-generic kernel, it does not do much but print errors to std_error since it cannot connect to the Internet. It works in the 4.13.0-39-generic kernel and opens the launchpad webpage.

[Kai-Heng Feng (kaihengfeng)]

I guess the linux-image-extra-4.13.0-41-generic didn't get installed. The wifi drivers are in the -extra package.

[Robert Harrelsons (bobharrelsons)]

I only upgrade via the Ubuntu Software Updater whenever it feels like doing so. How do I ensure the -extra package gets installed? Does this indicate a problem with the Updater Software?

[Kai-Heng Feng (kaihengfeng)]

Please attach the output of
$ dpkg -l | grep linux | grep extra

[Robert Harrelsons (bobharrelsons)]

I have attached the output of "dpkg -l | grep linux | grep extra". The output of that command was the same across both kernels 4.13.0-43-generic and 4.13.0-39-generic.

An important thing I would like to add is: the problem I had mentioned regarding black screen, low-graphics, dialog boxes, and no wifi happens 9/10 times in kernels 4.13.0-43-generic and 4.13.0-41-generic.

But, 1/10 times those kernels boot absolutely normally, and wifi also works at that time.

It seems to me that maybe sometimes the OS cannot detect certain things (devices/drivers) during boot-up. Could this be due to a virus or hardware problem?

Thanks!

[Kai-Heng Feng (kaihengfeng)]

So yo do have -extra package.
Please run `apport-collect` when the issue happens.

[Robert Harrelsons (bobharrelsons)]

I already uploaded the output of 'apport-collect 1770108' on 2nd June showing when the issue happens on 4.13.0-43-generic, and when there is no-issue on 4.13.0-39-generic. Please read my corresponding comment on 2nd June as well.

Do you want to me run `apport-collect` without any <report number>?

[Kai-Heng Feng (kaihengfeng)]

Arful is reaching EOL so please try Bionic. If the issue persists then we need to fix it.