Ubuntu Wiki

= DKMS will not work after 3.19.0-65 or above Kernel =; DKMS will not work after 3.19.0-65 or above Kernel if secure boot is enabled. To make DKMS works, you could do one of following method:

Method 1 - Disable Secure Boot from BIOS

1. Enter BIOS setup
2. Disable secure boot
3. Save configuration
4. Reboot the system

Method 2 - Purge 3.19.0-65 kernel before long term solution fix from Kernel is released

1. sudo apt-get purge linux-image-3.19.0-65-generic
2. Reboot the system

== Method 3 - Select 3.19.0-64.72 kernel to boot up system from GRUB before long term solution fix from Kernel is released ==

1. Press Esc after Dell logo show off to enter GRUB.
2. Select 3.19.0-64.72 kernel to boot up system

== Method 4 - Disable Secure Boot in shim-signed ==

1. Open a terminal by Ctrl + Alt + T, execute sudo update-secureboot-policy and then select ‘Yes’.

2. Enter a temporary password between 8 to 16 digits. (For example, 12345678, we will use this password later.)
3. Enter the same password again to confirm.
4. Reboot the system and press any key when you see the blue screen (MOK management).
5. Select “Change Secure Boot state”.

6. Press the corresponding password character and press Enter. Repeat this step several times to confirm previous temporary password like ‘12345678’ in step 2&3. For exmaple, '2' for this screen.

7. Select ‘Yes’ to disable Secure Boot in shim-signed.
8. Press Enter key to finish the whole procedure.

9. We can still enable Secure Boot in shim-signed again. Just execute sudo update-secureboot-policy --enable and then follow the similar steps above.