Same for me with 2.6.10-2-686 on a HP/Compaq nc6000. Probably related is the fact that kacpid starts to eat 99% CPU after a few minutes. dmesg says: 52: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0] ACPI-1138: *** Error: Method execution failed [\_SB_.C045.C058.C08E] (Node c14d7740), AE_AML_NO_OPERAND ACPI-1138: *** Error: Method execution failed [\_GPE._L11] (Node c14e36a0), AE_AML_NO_OPERAND ACPI-0552: *** Error: AE_AML_NO_OPERAND while evaluating method [_L11] for GPE[ 0]