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Re: Backlight bug on Acer Aspire 7720

On Sat, 19 Dec 2009 20:13:26 +0100, Thierry Chatelet wrote:

> On Saturday 19 December 2009 19:56:10 Camaleón wrote:
>> Can you both please run "dmesg | grep brightness" and copy/paste the
>> output after you press the function key to change the brightness of the
>> screen?
>> BTW, it seems to be related to this kernel bug:
>> Buggy _BCM - acer aspire 5720G, 5710Z, 5315
>> http://bugzilla.kernel.org/show_bug.cgi?id=13121
>> (see comment #28 for other possible affected Acer laptop models)
> Here it is:
> ACPI: Failed to switch the brightness
> but when the backligth is really dim and I press the function key for
> brightness, I get a message saying somethng about wrong value for it. I
> will write it when it happen. ( I don't want to stop/start the laptop
> until it goes wrong. Every forth, fifth time).

It seems many other people is experiencing that same issue:

Unable to set brightness

And they also point-out to the kernel bug.

Carefully review the messages posted on that forum and look for any 
possible bypass mentioned, if any :-?



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