[Bug 68617] Re: [Edgy] PowerManager has no more effect on brightness

[syntax]

> Please can you enlighten me as to how I could change the hal script(s)
rather than globally replacing /bin/sh with /bin/bash?

Edit the mentioned script as root. In the script on the first line there is:
#!/bin/sh

Just change this line on:
#!/bin/bash

-- 
[Edgy] PowerManager has no more effect on brightness
https://launchpad.net/bugs/68617