Arch Linux

Hi.

Description:

From Linux version 4.9 I have ACPI error on boot. I understand ACPI Linux failed to load, and change it to windows ACPI. It's cause watchdog also failed on Device creation ACPI.

[ 0.574520] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.574596] platform wdat_wdt: failed to claim resource 4
[ 0.574603] ACPI: watchdog: Device creation failed: -16

Then another ACPI error ocurrs with Device Video.

[ 15.750322] ACPI: Video Device [PEGP] (multi-head: yes rom: no post: no)
[ 15.750327] ACPI Error: [\_SB_.PCI0.GFX0.DD02._BCL] Namespace lookup failure, AE_NOT_FOUND (20160930/psargs-359)
[ 15.750338] ACPI Error: Method parse/execution failed [\_SB.PCI0.RP05.PEGP.DD02._BCL] (Node ffff88043e8f8578), AE_NOT_FOUND (20160930/psparse-543)

See Dmesg.txt.

My laptop is a Lenovo G40-70 wich have installed Windows 10 and ArchLinux with Kernel 4.10. See loaded modules in lsmod-g40-70.txt and lspci-g40-70 to get more information about laptop.

I tried update BIOS, but it isn't solve problem. Also, I disabled ACPI on boot with acpi=off kernel parameter and error don't ocurrs but don't boot neither.

Additionally, Wifi which load on module RTL8723be is intermitent. fwlps=0 and ant_sel=2 options are set. I think is produced by ACPI error, because it may be manage power save. I don't know much about it's.

For now, I installed acpid to diagnose if intermitent wifi happen with acpi event. Whetever ACPI error it's present and I'm worried that it's happened from 4.9 kernel version.
Steps to reproduce:

* Install Archlinux (clean) on Laptop Lenovo G40-70.
* Boot with ACPI enabled.

I'll hope you can help me.

Thanks.