[SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

bl0b · 2014-06-19 14:27:23

Hi,

after upgrading from Kernel 3.14.6 to 3.15.1, deactivating the my Nvidia Optimus GT730M by using acpi_call seems not to work anymore. Calling the parameters which worked until now seems to succeed:

bla$ sudo sh -c './gpuOff.sh && cat /proc/acpi/call'
0x0called

But neither I was able to observe any changes of the battery state nor the output of lspci has changed. As far as I can gather, there should be something like "rev ff" indicating a deactivated card?!

bla$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
02:00.0 VGA compatible controller: NVIDIA Corporation GK208M [GeForce GT 730M] (rev a1)

Acpi_call is up2date and compiled with current Headers.

Maybe I'm missing something?

Last edited by bl0b (2014-07-11 12:06:33)

clfarron4 · 2014-06-19 14:32:00

What is this gpuOff.sh I am seeing here? Some magical script from a repository or custom written?

bl0b · 2014-06-19 15:34:10

Sorry ^^
The script simply contains the parameters for deactivating the NVIDIA card of my t440p.

#!/bin/bash
echo "\_SB.PCI0.PEG.VID._DSM {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0} 0x100 0x1A {0x1,0x0,0x0,0x3}" >/proc/acpi/call
echo "\_SB.PCI0.PEG.VID._PS3" >/proc/acpi/call
exit 0

I have checked both lines and both commands succeed, at least according to /proc/acpi/call.

PS:
Using bumblebee/bbswitch is not working for me since it causes data corruption

Last edited by bl0b (2014-06-19 15:35:35)

abbradar · 2014-07-10 18:16:50

Hello,
I haven't found a good solution to this (so I haven't posted here after our PM exchange), but the problem with data corruption was solved!

bl0b · 2014-07-11 12:05:58

Thanks a lot for the reply, so I'll give bumblebee/bbswitch a "second" try

abbradar · 2014-07-18 21:41:54

I'm sorry a lot, there was a regression in the newer Linux kernels (well, that's not a regression in a kernel, but an another bug in Lenovo's ACPI) that prevented nvidia from disabling -- so bbswitch started working "out of the box" and there was no obvious problems. You can find more at https://github.com/Bumblebee-Project/bb … t-48768044 along with instructions that workaround the acpi_call breakage.

Arch Linux

#1 2014-06-19 14:27:23

[SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

#2 2014-06-19 14:32:00

Re: [SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

#3 2014-06-19 15:34:10

Re: [SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

#4 2014-07-10 18:16:50

Re: [SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

#5 2014-07-11 12:05:58

Re: [SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

#6 2014-07-18 21:41:54

Re: [SOLVED] Hybridgraphics: acpi_call after Kernelupgrade not working

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