Comment 0 for bug 908825

I've a Clevo M725 notebook rebranded as Santech T45. All the previous ubuntu releases support laptop hotkey without extra set up, but the last release seems that broke the support of them.
Almost all the acpi event are disappear. In particular, I notice that are not processor recognized:
- the ac_adapter plug and unplug
- battery charging/discharging event
- suspend button*
- backlight hotkey event*
- low power mode button*
- lid open/close

The bug is reproducible booting the laptop with a kubuntu 11.04 live. Using acpi_event command I've saved the output for low power mode button, backlight up and down and suspend button:
#: acpi_listen
processor CPU0 00000080 00000003
processor CPU0 00000081 00000000
processor CPU1 00000080 00000003
processor CPU1 00000081 00000000
processor CPU0 00000080 00000000
processor CPU0 00000081 00000000
processor CPU1 00000080 00000000
processor CPU1 00000081 00000000
video LCD 00000087 00000000
video LCD 00000086 00000000
button/sleep SLPB 00000080 00000002

On the other hand, in kubuntu 11.10 there are no output at all.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: acpi (not installed)
ProcVersionSignature: Ubuntu 3.0.0-15.24-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Mon Dec 26 14:06:15 2011
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: acpi
UpgradeStatus: No upgrade log present (probably fresh install)