[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

xev output looks normal (one down, one up event for each keypress).  The
output of acpi_listen doesn't show any events that acpid/acpi-support
react to by default.

Please try stopping acpid (sudo service stop acpid) and test again, and
see whether this makes any difference (I don't expect that it will).

Please also attach the output of 'lshal'.

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Screen brightness double level changes on Dell laptops
https://bugs.launchpad.net/bugs/207473
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