Unable to switch off NVIDA card via bbswitch on Thinkpad T540p

[oliverwelter]

Hello,
I'm trying to use bbswitch-0.8 for turning off the GeForce GT 730M on a Lenovo Thinkpad T540p.
The state shown in /proc/acpi/bbswitch stays on 'ON' independent of load_state and manual setting.
The power consumption supports the suspicion that the card is still running.

cat /etc/modprobe.d/bbswitch.conf:
options bbswitch load_state=0 unload_state=1

I also tried to switch off manually: 
cat /proc/acpi/bbswitch:
0000:01:00.0 ON

tee /proc/acpi/bbswitch <<<OFF:
OFF

cat /proc/acpi/bbswitch:
0000:01:00.0 ON

dmesg | grep -C 10 bbswitch:
  80.096972] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[   80.102515] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[   80.102856] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[   80.114086] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[   80.220897] e1000e: enp0s25 NIC Link is Down
[   80.318107] e1000e 0000:00:19.0: irq 42 for MSI/MSI-X
[   80.418589] e1000e 0000:00:19.0: irq 42 for MSI/MSI-X
[   80.418666] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[   83.141353] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[   83.141382] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready
[ 1696.021986] bbswitch: version 0.8
[ 1696.021990] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.VID_
[ 1696.021995] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG_.VID_
[ 1696.022003] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 1696.022308] bbswitch: detected an Optimus _DSM function
[ 1696.022318] pci 0000:01:00.0: enabling device (0000 -> 0003)
[ 1696.022345] bbswitch: disabling discrete graphics
[ 1696.022348] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 1696.033095] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[ 1718.636370] bbswitch: disabling discrete graphics
[ 1718.636381] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 1718.636910] ------------[ cut here ]------------
[ 1718.636917] WARNING: CPU: 1 PID: 6333 at drivers/pci/pci.c:1535 pci_disable_device+0x9c/0xb0()
[ 1718.636920] pci 0000:01:00.0: disabling already-disabled device
[ 1718.636921] Modules linked in:
[ 1718.636922]  bbswitch(O) ctr ccm acpi_call(O) dm_crypt wacom snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core hid_logitech_dj snd_hda_codec_hdmi arc4 snd_hda_codec_generic x86_pkg_temp_thermal dm_mod kvm_intel kvm iwlmvm mac80211 crc32c_intel aesni_intel aes_x86_64 i915 joydev iwlwifi fbcon bitblit cfbfillrect softcursor font cfg80211 cfbimgblt i2c_algo_bit cfbcopyarea wmi drm_kms_helper drm fb thinkpad_acpi fbdev snd_hda_intel intel_gtt snd_hda_controller e1000e rfkill agpgart snd_hda_codec ehci_pci ptp ehci_hcd video pps_core snd_hwdep vboxnetadp(O) vboxnetflt(O) vboxdrv(O)
[ 1718.636958] CPU: 1 PID: 6333 Comm: tee Tainted: G           O  3.16.3-gentoo #2
[ 1718.636960] Hardware name: LENOVO 20BFS05L00/20BFS05L00, BIOS GMET66WW (2.14 ) 07/01/2014
[ 1718.636961]  0000000000000009 ffff880370f3bdd8 ffffffff8156f45b ffff880370f3be20
[ 1718.636963]  ffff880370f3be10 ffffffff81060a28 ffff8804283ba000 ffff88042836ca30
[ 1718.636965]  0000000000000004 ffff880370f3bf50 0000000000000008 ffff880370f3be70
[ 1718.636967] Call Trace:
[ 1718.636973]  [<ffffffff8156f45b>] dump_stack+0x4e/0x7a
[ 1718.636976]  [<ffffffff81060a28>] warn_slowpath_common+0x78/0xa0
[ 1718.636978]  [<ffffffff81060a97>] warn_slowpath_fmt+0x47/0x50
[ 1718.636980]  [<ffffffff812ca6ac>] pci_disable_device+0x9c/0xb0

uname -a:
Linux barret 3.16.3-gentoo #2 SMP PREEMPT Sat Sep 20 12:56:47 CEST 2014 x86_64 Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz GenuineIntel GNU/Linux

Linux: Gentoo
XOrg: 1.16.0.901
NVIDIA-Driver: official 343.13-r1
bbswitch-0.8

At the moment it is not possible to add comments on https://bugs.launchpad.net/bugs/752542 because of timeouts. I'm going to upload and link to the comment as soon as launchpad works again.

Kind Regards,
Oliver

[Lekensteyn]

Did it work on older kernels? Can you reproduce it on newer kernels?

[oliverwelter]

I tried 3.17.0 getting a similar error message:

[  241.014312] bbswitch: detected an Optimus _DSM function
[  241.014326] pci 0000:01:00.0: enabling device (0000 -> 0003)
[  241.014368] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[  286.792485] bbswitch: disabling discrete graphics
[  286.792508] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140724/nsarguments-95)
[  520.003960] bbswitch: disabling discrete graphics
[  520.003986] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140724/nsarguments-95)
[  520.005243] ------------[ cut here ]------------
[  520.005260] WARNING: CPU: 2 PID: 5391 at drivers/pci/pci.c:1535 pci_disable_device+0x9c/0xb0()
[  520.005265] pci 0000:01:00.0: disabling already-disabled device
[  520.005268] Modules linked in:
[  520.005273]  bbswitch(O) ctr ccm dm_crypt uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core hid_logitech_dj snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device snd_hda_codec_hdmi joydev arc4 iwlmvm mac80211 x86_pkg_temp_thermal kvm_intel dm_mod kvm iwlwifi crc32c_intel aesni_intel aes_x86_64 cfg80211 snd_hda_codec_generic i915 fbcon bitblit cfbfillrect softcursor cfbimgblt font i2c_algo_bit cfbcopyarea wmi drm_kms_helper drm thinkpad_acpi fb fbdev snd_hda_intel intel_gtt e1000e rfkill agpgart snd_hda_controller ehci_pci snd_hda_codec ptp ehci_hcd snd_hwdep pps_core video vboxnetadp(O) vboxnetflt(O) vboxdrv(O)
[  520.005370] CPU: 2 PID: 5391 Comm: tee Tainted: G           O   3.17.0-gentoo #1
[  520.005375] Hardware name: LENOVO 20BFS05L00/20BFS05L00, BIOS GMET66WW (2.14 ) 07/01/2014
[  520.005379]  0000000000000009 ffff88008b1efdd8 ffffffff8157a982 ffff88008b1efe20
[  520.005387]  ffff88008b1efe10 ffffffff81062078 ffff88042838a000 ffff88042833fb10
[  520.005394]  0000000000000004 ffff88008b1eff50 0000000000000008 ffff88008b1efe70
[  520.005401] Call Trace:
[  520.005413]  [<ffffffff8157a982>] dump_stack+0x4e/0x7a
[  520.005423]  [<ffffffff81062078>] warn_slowpath_common+0x78/0xa0
[  520.005430]  [<ffffffff810620e7>] warn_slowpath_fmt+0x47/0x50
[  520.005437]  [<ffffffff812cff2c>] pci_disable_device+0x9c/0xb0
[  520.005443]  [<ffffffffa00681de>] 0xffffffffa00681de
[  520.005449]  [<ffffffffa00684dd>] 0xffffffffa00684dd
[  520.005458]  [<ffffffff811cafd8>] proc_reg_write+0x38/0x70
[  520.005468]  [<ffffffff81170432>] vfs_write+0xb2/0x1f0
[  520.005475]  [<ffffffff81170f81>] SyS_write+0x41/0xb0
[  520.005481]  [<ffffffff8158178b>] tracesys+0xdd/0xe2
[  520.005487] ---[ end trace c7bfb1b70d523268 ]---

[oliverwelter]

I'm going to test 3.14.21, 3.12.30 and 3.10.57

[Lekensteyn]

Please put those dumps in backticks to avoid messing up formatting:

   code here

Could you upload your acpidump to https://gist.github.com?

[oliverwelter]

I uploaded acpidump.txt to https://gist.github.com/oliverwelter/eff05549b68780f52dc2

[oliverwelter]

I checked a couple of older kernels and I was able to switch off the card using kernels 3.10.57, 3.12.30 and 3.14.21. The ACPI warning is still present in the kernel log but reading /proc/acpi/bbswitch showed OFF after disabling.

On the other hand the described issues was present in version 3.16.6, 3.17.0 and 3.17.1. /proc/acpi/bbswitch shows ON all the time and if I try to disable the card twice the shown stacktrace appears.

[leoluk]

Works fine on 3.16.3.

[bluec0re]

Same issue on Arch Linux.
Kernel 3.17.2
bbswitch 0.8
NVIDIA Quadro K2100M

Also with the same ACPI warnings

[oliverwelter]

Same issue with kernel 3.17.3 .

[oliverwelter]

Same issue with kernel 3.17.4

[oliverwelter]

Same issue with kernel 3.18.0

[TheAifam5]

The same with Linux-CK 3.17-6
nVidia GT 540M
Samsung RC730 - d0dde

[oliverwelter]

Like suggested in some other ongoing issues I successfully applied the kernel command parameter acpi_osi="!Windows 2013". Afterwards I was able to switch off the NVIDIA card and the power consumption decreased as well.

[bluec0re]

Works for me. Works like a charm now with Arch Linux vanilla Kernel 3.17.6-1.

Thx!