Bug#692361: [experimental] ACPI display backlight brightness is set to zero at every boot-up

[Jonathan Nieder <jrnieder@gmail.com>]

Stefan Nagy wrote:

> I tested this with vanilla kernel 3.6.4 and can confirm that this is an
> upstream bug. I suppose this bug report is a duplicate of #681743 but since I'm
> seeing this on another notebook (HP Folio 13-2000) than the original reporter
> Jonathan Nieder asked me to open a new report.

Thanks!  They certainly seem related, though I am not sure yet that
the symptoms are identical.

> Please tell me if you need more information.

Please attach full "dmesg" output from booting a good and bad kernel,
and "acpidump" output.

Hope that helps,
Jonathan