Debian on Let's note R8

Let's note R8で輝度調節ができない。

どうも ACPIがうまく動いていないからみたい。


[    0.220817] ACPI Error (dswload-0659): [DD02] Namespace lookup failure, AE_NOT_FOUND
[    0.221020] ACPI Exception: AE_NOT_FOUND, During name lookup/catalog (20090903/psloop-230)
[    0.221226] ACPI Error (psparse-0537): Method parse/execution failed [\] (Node c1515558), AE_NOT_FOUND
[    0.221636] ACPI Error (dswload-0659): [USB0] Namespace lookup failure, AE_NOT_FOUND
[    0.221836] ACPI Exception: AE_NOT_FOUND, During name lookup/catalog (20090903/psloop-230)
[    0.222039] ACPI Error (psparse-0537): Method parse/execution failed [\] (Node c1515558), AE_NOT_FOUND
[    0.222396] ACPI: Executed 3 blocks of module-level executable AML code
[    0.235025] ACPI: BIOS _OSI(Linux) query ignored
[    0.253323] ACPI Error (psargs-0359): [\_SB_.PCI0.GFX0.DD02.CUBL] Namespace lookup failure, AE_NOT_FOUND
[    0.253537] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.GFX0.INIG] (Node f6c41f68), AE_NOT_FOUND
[    0.253893] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_._REG] (Node f6c3dec8), AE_NOT_FOUND
[    0.254268] Fail in evaluating the _REG object of EC device. Broken bios is suspected.
[    0.254362] ACPI: Interpreter enabled
[    0.254452] ACPI: (supports S0 S1 S3 S4 S5)
[    0.254847] ACPI: Using IOAPIC for interrupt routing
[    0.284363] ACPI: EC: GPE = 0x17, I/O: command/status = 0x66, data = 0x62
[    0.284801] ACPI: No dock devices found.
[    0.289057] ACPI: PCI Root Bridge [PCI0] (0000:00)