RE: Problem with ACPI

Hi FreeBSD users,

I'm using FreeBSD 8-Current and i have this message in dmesg when i 
click on the direct application button:

acpi_ec0: wait timed out (no response), forcing polled mode
acpi_ec0: EcRead: failed waiting to get data
ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by 
Handler for [EmbeddedControl] [20070320]
ACPI Error (psparse-0626): Method parse/execution failed [\\_SB_.HTEV] 
(Node 0xc6b4cb60), AE_NO_HARDWARE_RESPONSE
ACPI Error (psparse-0626): Method parse/execution failed 
[\\_SB_.PCI0.LPC_.EC0_._Q44] (Node 0xc6b4b020), AE_NO_HARDWARE_RESPONSE
acpi_ec0: evaluation of query method _Q44 failed: AE_NO_HARDWARE_RESPONSE
acpi_ec0: EcRead: failed waiting to get data
ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by 
Handler for [EmbeddedControl] [20070320]
ACPI Error (psparse-0626): Method parse/execution failed 
[\\_SB_.BAT0._BST] (Node 0xc6b46860), AE_NO_HARDWARE_RESPONSE
acpi_ec0: EcRead: failed waiting to get data
ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by 
Handler for [EmbeddedControl] [20070320]
ACPI Error (psparse-0626): Method parse/execution failed 
[\\_SB_.BAT0._BST] (Node 0xc6b46860), AE_NO_HARDWARE_RESPONSE
acpi_ec0: EcRead: failed waiting to get data
ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by 
Handler for [EmbeddedControl] [20070320]
ACPI Error (psparse-0626): Method parse/execution failed 
[\\_SB_.BAT0._BST] (Node 0xc6b46860), AE_NO_HARDWARE_RESPONSE
acpi_ec0: EcRead: failed waiting to get data
ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by 
Handler for [EmbeddedControl] [20070320]
ACPI Error (psparse-0626): Method parse/execution failed 
[\\_SB_.BAT0._BST] (Node 0xc6b46860), AE_NO_HARDWARE_RESPONSE
acpi_ec0: EcRead: failed waiting to get data
ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by 
Handler for [EmbeddedControl] [20070320]
ACPI Error (psparse-0626): Method parse/execution failed 
[\\_SB_.PCI0.LPC_.EC0_._Q43] (Node 0xc6b4b040), AE_NO_HARDWARE_RESPONSE
acpi_ec0: evaluation of query method _Q43 failed: AE_NO_HARDWARE_RESPONSE

I'm using the latest available bios version.
Do you know where the problem come from ?
Do you know if i need a special "acpi_support" driver to make it work 
(like the acpi_panasonic or acpi_sony) ?

Thanks in advance.
Niko.