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once in a while, the screen brightness stops responding to any reason, and stays on full brightness..

for those of you that have HP Envy, you know what this means... battery suicide.

the FN+* controls don't work. i also tried going in to power settings and adjusting all modes brightness to low wend of spectrum, after saving, it has no effect..

i suppose i could try rebooting as i always just put my laptop to sleep :/

anyone came across this ?

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I have the same problem with a HP Mini netbook. I know the F2 key is not broken so it seems to be a firmware or driver issue specific to HP. I'm running Windows 7 - what OS are you running? – hippietrail Jul 27 '11 at 8:26
i was running 7 also.... gotten rid of that laptop since and got a macbook pro.. – Sonic Soul Jul 27 '11 at 11:28
In my case I noticed that I'd changed the monitor driver so I'v reverted it and I'm keeping an eye on whether the keys stop working again. I don't have the $$$ for a Mac (-: – hippietrail Jul 27 '11 at 11:42
Reverting to the original monitor driver did not work for me on my HP Mini. – hippietrail Aug 9 '11 at 8:00

I had an issue with this. It had to do with the F2 key being broken, which caused the brightness level to ramp up and not come down.

Try to disable the F2 key in the registry. If the problem disappears, you found the problem.

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This could be a problem with the ACPI-driver. Try installing the latest version. Check the changelogs of the new BIOS updates as well, and see if you find any fixed issues related to this.

Try to change the brightness from within Windows.

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