This is ACPI report for my Thinkpad T540p. nvidia power management NOT working. the card is always on.


r9-008cln ~ # dmesg | grep -C 10 bbswitch:
[    8.483575] sound hdaudioC1D0:    inputs:
[    8.483603] sound hdaudioC1D0:      Dock Mic=0x19
[    8.483633] sound hdaudioC1D0:      Mic=0x1a
[    8.483661] sound hdaudioC1D0:      Internal Mic=0x12
[    8.507378] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/sound/card1/hdaudioC1D0/input14
[    8.507553] input: HDA Intel PCH Dock Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input15
[    8.507625] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input16
[    8.507743] input: HDA Intel PCH Dock Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input17
[    8.507959] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input18
[    8.732757] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[   10.763932] bbswitch: version 0.8
[   10.763963] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.VID_
[   10.764009] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG_.VID_
[   10.764053] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[   10.764652] bbswitch: detected an Optimus _DSM function
[   10.764682] pci 0000:01:00.0: enabling device (0000 -> 0003)
[   10.764741] bbswitch: disabling discrete graphics
[   10.764759] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[   10.776332] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[   10.777994] bbswitch: disabling discrete graphics
[   10.778023] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[   10.778743] ------------[ cut here ]------------
[   10.778768] WARNING: CPU: 4 PID: 407 at drivers/pci/pci.c:1535 pci_disable_device+0xb1/0xc0()
[   10.778798] pci 0000:01:00.0: disabling already-disabled device
[   10.778818] Modules linked in:
[   10.778832]  bbswitch(O) snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core snd_hda_intel snd_hda_controller i915 v4l2_common videodev snd_hda_codec iwlmvm snd_hwdep snd_pcm e1000e i2c_algo_bit snd_timer btusb drm_kms_helper iwlwifi rtsx_pci_sdmmc mmc_core rtsx_pci_ms memstick drm snd ptp soundcore rtsx_pci video x86_pkg_temp_thermal pps_core wmi vboxnetadp(O) vboxnetflt(O) vboxdrv(O)
[   10.779021] CPU: 4 PID: 407 Comm: bumblebeed Tainted: G        W  O  3.16.3-gentoo #4
[   10.779041] Hardware name: LENOVO 20BEA008RT/20BEA008RT, BIOS GMET66WW (2.14 ) 07/01/2014
[   10.779062]  0000000000000009 ffff88041f67bda8 ffffffff81842a81 0000000000000007
[   10.779086]  ffff88041f67bdf8 ffff88041f67bde8 ffffffff8104ecdc ffff88041f67bdc8
--
[  377.314289] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[  377.314401] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[  378.154140] thinkpad_acpi: EC reports that Thermal Table has changed
[  378.326876] ACPI Error: Field [TBF3] at 270336 exceeds Buffer [NULL] size 262144 (bits) (20140424/dsopcode-236)
[  378.326885] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG_.VID_.GETB] (Node ffff88042d835a78), AE_AML_BUFFER_LIMIT (20140424/psparse-536)
[  378.326894] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG_.VID_._ROM] (Node ffff88042d835a50), AE_AML_BUFFER_LIMIT (20140424/psparse-536)
[  378.334259] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[  378.521543] thinkpad_acpi: asked for hotkey mask 0x0000ffbf, but firmware forced it to 0x0000ffbb
[  378.932958] thinkpad_acpi: EC reports that Thermal Table has changed
[  466.269967] [drm] Module unloaded
[  466.271805] bbswitch: disabling discrete graphics
[  466.271818] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[  466.283735] pci 0000:01:00.0: Refused to change power state, currently in D0
[  549.044353] thinkpad_acpi: EC reports that Thermal Table has changed
[  550.085161] thinkpad_acpi: EC reports that Thermal Table has changed
[  629.991617] thinkpad_acpi: EC reports that Thermal Table has changed
[  631.032467] thinkpad_acpi: EC reports that Thermal Table has changed

r9-008cln ~ # uname -a
Linux r9-008cln 3.16.3-gentoo #4 SMP PREEMPT Thu Oct 9 16:02:07 MSK 2014 x86_64 Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz GenuineIntel GNU/Linux


X.Org X Server 1.16.1
nvidia driver 343.22-r2


Gentoo Linux (latest)