DKMS
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
- Enter BIOS setup
- Disable secure boot
- Save configuration
- Reboot the system
Method 2 - Purge 3.19.0-65 kernel before long term solution fix from Kernel is released
- sudo apt-get purge linux-image-3.19.0-65-generic
- 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
- Press Esc after Dell logo show off to enter GRUB
- Select 3.19.0-64.72 kernel to boot up system
Method 4 - Disable Secure Boot in shim-signed
Open a terminal by Ctrl + Alt + T, execute sudo update-secureboot-policy and then select Yes
Enter a temporary password between 8 to 16 digits. (For example, 12345678, we will use this password later.)
Enter the same password again to confirm
Reboot the system and press any key when you see the blue screen (MOK management)
Select Change Secure Boot state
Press the corresponding password character and press Enter. Repeat this step several times to confirm previous temporary password like 12345678 in Step 2 and Step 3. For exmaple, 2 shown in below picture
Select Yes to disable Secure Boot in shim-signed
Press Enter key to finish the whole procedure
We can still enable Secure Boot in shim-signed again. Just execute sudo update-secureboot-policy --enable and then follow the similar steps above