hI Rafael:
            The following error log are produced by acpi_evaluate_reference().
It found _DEP returned package with 0 element and return AE_BAD_DATA.

From dsdt table, _DEP may return package with 0 in some cases. Can we
make acpi_evaluate_reference() not produce the error log and let caller check
the package length? So far, only thermal and _DEP use the function.

            Method (_DEP, 0, NotSerialized) // _DEP: Dependencies
            {
                ADBG ("SAT0 DEP Call")
                If ((OSYS >= 0x07DD))
                {
                    If (((S0ID == One) && ((PEPC & 0x03) != Zero)))
                    {
                        ADBG ("SAT0 DEP")
                        Return (Package (0x01)
                        {
                            PEPD
                        })
                    }
                }

                ADBG ("SAT0 DEP NULL")
                Return (Package (0x00) {})
            }

On 2014年12月12日 16:55, Huang Ying wrote:

FYI, we noticed the changes on commit 40e7fcb19293cbdff02c74cb0668413480f82ea1 ("ACPI: Add _DEP support to fix battery issue on Asus T100TA") The dmesg is as follow and attached. [ 1.332908] ACPI: Power Resource [PG00] (on) [ 1.341096] ACPI: Power Resource [PG01] (on) [ 1.349277] ACPI: Power Resource [PG02] (on) [ 1.357600] ACPI: [Package] has zero elements (ffff880136a63ac0) [ 1.364422] acpi LNXVIDEO:00: Failed to evaluate _DEP. [ 1.379349] ACPI: [Package] has zero elements (ffff880136ac9080) [ 1.386171] acpi device:2e: Failed to evaluate _DEP. [ 1.393244] ACPI: [Package] has zero elements (ffff880136ac9140) [ 1.400067] acpi INT3432:00: Failed to evaluate _DEP. [ 1.408336] ACPI: [Package] has zero elements (ffff880136ac9700) [ 1.415144] acpi INT3433:00: Failed to evaluate _DEP. [ 1.425509] ACPI: [Package] has zero elements (ffff880136b47380) [ 1.432333] acpi INT3434:00: Failed to evaluate _DEP. [ 1.438566] ACPI: [Package] has zero elements (ffff880136b47500) [ 1.445390] acpi INT3435:00: Failed to evaluate _DEP. [ 1.451701] ACPI: [Package] has zero elements (ffff880136b47600) [ 1.458526] acpi INT3436:00: Failed to evaluate _DEP. [ 1.464734] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.471558] acpi INT3438:00: Failed to evaluate _DEP. [ 1.477734] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.484556] acpi device:4b: Failed to evaluate _DEP. [ 1.490566] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.497388] acpi device:4d: Failed to evaluate _DEP. [ 1.503402] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.510226] acpi device:4f: Failed to evaluate _DEP. [ 1.516237] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.523045] acpi device:51: Failed to evaluate _DEP. [ 1.529055] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.535878] acpi device:53: Failed to evaluate _DEP. [ 1.541898] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.548719] acpi device:55: Failed to evaluate _DEP. [ 1.554724] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.561546] acpi device:57: Failed to evaluate _DEP. [ 1.567545] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.574368] acpi device:59: Failed to evaluate _DEP. [ 1.580116] ACPI: [Package] has zero elements (ffff880136b47700) [ 1.586939] acpi device:5a: Failed to evaluate _DEP. [ 1.593108] acpi ABCD0000:00: ACPI dock station (docks/bays count: 1) [ 1.601756] ACPI: Power Resource [FN00] (off) [ 1.606790] ACPI: Power Resource [FN01] (on) To reproduce: apt-get install ruby ruby-oj git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/setup-local job.yaml # the job file attached in this email bin/run-local job.yaml Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Fengguang