How To Edit Grub Boot Parameters
The reason that you will usually want to change boot parameters is to configure the default kernel to something specific to your hardware. Grub allows you to change a boot parameter temporarily , in which case it won't survive a system reboot, or permanently, which means that it will. When trying to fix something on your machine using kernel parameters, a reasonably safe way to proceed is to first make the changes temporarily, check that you get what you expect, and then make the change permanent.
If changing kernel boot parameters sound scary, it isn't. None of the boot parameters that I have come across are destructive in any way. The worst result could be that your machine hangs until you restart it. Even if you make the change permanently, you always still have the opportunity of intercepting the Grub boot and changing the parameter back.
1. Changing Boot Parameters Temporarily
Generally, this is used when you want to try a parameter change to see it is beneficial to your system. When the PC boots up, you will see the Grub countdown, which is set to 3 seconds by default. Press "Esc" to intercept this countdown and go enter a Grub menu. Then
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