[Bug 516772] Re: HP Touchsmart tm2 brightness level not changing

[Anton Anikin]

Sometimes it is possible to change the brightness with command:
setpci -s 00:02.0 F4.B=FF
where the value can be from 00 to FF
But sometimes the laptop booted with no backlight at all, and it is posible to change the brightness in such cases...

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HP Touchsmart tm2 brightness level not changing
https://bugs.launchpad.net/bugs/516772
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