[Ubuntu Wiki] Update of "DebuggingKernelBoot" by penalvch

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The "DebuggingKernelBoot" page has been changed by penalvch:
http://wiki.ubuntu.com/DebuggingKernelBoot?action=diff&rev1=26&rev2=27

Comment:
1) Due to LP#1848445 add note on need to provide evidence (not verbal/stating) or dev's cannot debug. 2) Separate sect to avoid folks skipping steps.

    * A picture of the bad boot via cellphone or camera.
    * Writing it down by hand.
  
- Depending on the type of error messages you encounter, there are other boot options you could try. For example, if you notice ACPI errors, try booting with the '''acpi=off''' boot option. For a full description of these options, refer to the [[https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html|kernel parameters]] document.
+ /!\ Please note, stating the boot didn't work is not enough for a developer to review the problem. You must provide evidence as noted above.
  
+ = Further diagnosing =
+ 
+ After the evidence above has been attached to your report, depending on the type of error messages you encounter, there are other boot options you could try to help a developer further diagnose.
+ 
+ For example, if you notice ACPI errors, try booting with the '''acpi=off''' boot option. For a full description of these options, refer to the [[https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html|kernel parameters]] document.
+ 
- = Boot looping or boot halts =
+ == Boot looping or boot halts ==
  
  If your boot immediately restarts, or halts, please utilize the boot debugging options to capture the bad boot.
  
- = Dropped into a initramfs shell =
+ == Dropped into a initramfs shell ==
  
  If your boot is dropped into an initramfs shell, this indicates errors in the boot sequence, for example failing to find your root partition/filesystem. You are put into the initramfs shell in an effort to allow you to recover the system. Hopefully, if you boot with the '''quiet''' and '''splash''' options removed you will notice error messages before being dropped into the shell which will help debug and direct you to a solution.