Originally Posted by noneofthecharacters
Is there a problem with any of the Linux distributions if I change my power supply unit? I mean, will the Linux operating systems work properly with a new power supply unit or do I have to reinstall all Linux distributions?
The way PC power supplies work is independent of the operating system. Quite a lot of computing using BIOS code is executed before ever the PC discovers its own hard drive, let alone how many operating systems are there. druuna
is right in that you should not encounter problems. Be aware of ACPI
(Advanced Configuration and Power Interface
). Usually there are options to deselect or manage it during the installation process, so if you already have all those distros on partitions, I have to think you already got past this. It will be all about sleep-state suspend, hibernate, power restore restart states, etc.
Very old PSUs were hard switched with a latching pushbutton. When came software-controlled startups/shutdowns, there needed to be some way to trick a power supply to start up, even though the motherboard was not actually powered yet (classic "bootstrap" situation). Standard power supplies are persuaded to start by linking pins 13 and 14 on the connector, usually 13 has black and 14 has green wire. This is done with semiconductors on the motherboard, but is a handy dodge when you want a low-cost high current power supply around.
In passing - when I had a similar setup, with a whole bunch of distros booted from a single GRUB list, I found having a separate /home partition hard to manage, because each distro had lots of hidden configuration files, some of which overwrote the others at every update. Much easier to make my real data partition have another name, and let every distro make its own (small) /home folder in its own space.