Suspend/Resume on Lenovo IdeaPad S400 with FreeBSD 10?

[Ivan Rokotov]

Hi,

I'm experimenting with suspend/resume on Lenovo IdeaPad S400 with
FreeBSD 10.0-RELEASE. dmesg from this machine and acpi-related sysctl
info is attached.

Info as recommended on https://wiki.freebsd.org/SuspendResume:

# sysctl hw.acpi.supported_sleep_state
hw.acpi.supported_sleep_state: S3 S4 S5

# pciconf -l | sed 's/[0-9]*@.*//' | sort -u
ahci ehci hdac hostb isab iwn none pcib re vgapci xhci

Text mode:
# kldstat | awk '{ if (index($5, ".ko")) print $5 }'
linux.ko coretemp.ko vboxdrv.ko drm2.ko iicbus.ko cuse4bsd.ko tmpfs.ko
nullfs.ko linprocfs.ko linsysfs.ko ng_ubt.ko netgraph.ko ng_hci.ko
ng_bluetooth.ko ng_l2cap.ko ng_btsocket.ko ng_socket.ko vboxnetflt.ko
ng_ether.ko vboxnetadp.ko

In X, i915kms.ko and iic.ko iicbb.ko are added.

1. Suspend from text mode and X work. In X, the screen goes to some
sort of low color profile (reducing number of colors to e.g.16) for a
moment, then goes black. In both cases, fans turn off, power button is
blinking.

2. Resume to text mode: everything works except video (backlight
visible, but nothing more). No error messages in the logs. I can ssh
to that machine, usb ports and webcam wake up. I can even type
'startx' blindly - and X starts normally, the screen picture appears.

3. Resume to X. The correct screen picture, in full color, appears for
a part of a second, then dissapears and

3a. the first time I tried, after that only backlight remained.
Machine was in a working state and I ssh'd to it and found this in the
logs:

error: [drm:pid12:i915_hangcheck_elapsed] *ERROR* Hangcheck timer
elapsed... GPU hung
info: [drm] capturing error event; look for more information in sysctl
hw.dri.0.info.i915_error_state

That output is attached.

3b. next time I tried, screen picture turns to a mess of white, pink
etc. dots and computer became non-responsive. Can't ssh to it, can't
type anything. The fan is silent. Only hard reset remains.

Experimenting with acpi_video.ko and hw.acpi.reset_video=1 changes
absolutely nothing.

More info to post? Does anybody have this or similar notebook? Your
experiences? Something new to try?

Ivan
-------------- next part --------------
Copyright (c) 1992-2014 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.0-RELEASE #0: Sun Apr  6 05:35:51 2014
    ... at ...:/usr/obj/usr/src/sys/... amd64
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
info: [drm] Initialized drm 1.1.0 20060810
CPU: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz (1795.96-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x306a9  Family = 0x6  Model = 0x3a  Stepping = 9
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x3dbae3bf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,XSAVE,OSXSAVE,AVX,F16C>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  Standard Extended Features=0x281<GSFSBASE,SMEP,ENHMOVSB>
  TSC: P-state invariant, performance statistics
real memory  = 4294967296 (4096 MB)
avail memory = 4001140736 (3815 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <LENOVO CB-01   >
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 SMT threads
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  2
 cpu3 (AP): APIC ID:  3
ioapic0 <Version 2.0> irqs 0-23 on motherboard
Cuse4BSD v0.1.30 @ /dev/cuse
kbd1 at kbdmux0
random: <Software, Yarrow> initialized
acpi0: <LENOVO CB-01> on motherboard
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
cpu2: <ACPI CPU> on acpi0
cpu3: <ACPI CPU> on acpi0
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 950
Event timer "HPET" frequency 14318180 Hz quality 550
Event timer "HPET1" frequency 14318180 Hz quality 440
Event timer "HPET2" frequency 14318180 Hz quality 440
Event timer "HPET3" frequency 14318180 Hz quality 440
Event timer "HPET4" frequency 14318180 Hz quality 440
atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0
atrtc0: Warning: Couldn't map I/O.
Event timer "RTC" frequency 32768 Hz quality 0
attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
acpi_ec0: <Embedded Controller: GPE 0x17> port 0x62,0x66 on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0x3000-0x303f mem 0xd0000000-0xd03fffff,0xc0000000-0xcfffffff irq 16 at device 2.0 on pci0
agp0: <IvyBridge mobile GT2 IG> on vgapci0
agp0: aperture size is 256M, detected 65532k stolen memory
vgapci0: Boot video device
xhci0: <Intel Panther Point USB 3.0 controller> mem 0xd0600000-0xd060ffff at device 20.0 on pci0
usbus0: waiting for BIOS to give up control
xhci0: 32 byte context size.
xhci0: Port routing mask set to 0xffffffff
usbus0 on xhci0
pci0: <simple comms> at device 22.0 (no driver attached)
ehci0: <Intel Panther Point USB 2.0 controller> mem 0xd0619000-0xd06193ff irq 16 at device 26.0 on pci0
usbus1: EHCI version 1.0
usbus1 on ehci0
hdac0: <Intel Panther Point HDA Controller> mem 0xd0610000-0xd0613fff irq 22 at device 27.0 on pci0
pcib1: <ACPI PCI-PCI bridge> irq 17 at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
re0: <RealTek 810xE PCIe 10/100baseTX> port 0x2000-0x20ff mem 0xd0404000-0xd0404fff,0xd0400000-0xd0403fff irq 16 at device 0.0 on pci1
re0: Using 1 MSI-X message
re0: turning off MSI enable bit.
re0: ASPM disabled
re0: Chip rev. 0x40800000
re0: MAC rev. 0x00400000
miibus0: <MII bus> on re0
rlphy0: <RTL8201E 10/100 media interface> PHY 1 on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, auto-flow
re0: Ethernet address: 20:1a:06:31:cd:a7
pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.1 on pci0
pci2: <ACPI PCI bus> on pcib2
iwn0: <Intel Centrino Wireless-N 2230> mem 0xd0500000-0xd0501fff irq 17 at device 0.0 on pci2
ehci1: <Intel Panther Point USB 2.0 controller> mem 0xd0618000-0xd06183ff irq 23 at device 29.0 on pci0
usbus2: EHCI version 1.0
usbus2 on ehci1
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
ahci0: <Intel Panther Point AHCI SATA controller> port 0x3088-0x308f,0x3094-0x3097,0x3080-0x3087,0x3090-0x3093,0x3060-0x307f mem 0xd0617000-0xd06177ff irq 19 at device 31.2 on pci0
ahci0: AHCI v1.30 with 6 3Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
ahciem0: <AHCI enclosure management bridge> on ahci0
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
acpi_button0: <Power Button> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Synaptics Touchpad, device ID 0
battery0: <ACPI Control Method Battery> on acpi0
acpi_acad0: <AC Adapter> on acpi0
orm0: <ISA Option ROM> at iomem 0xcf000-0xcffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ppc0: cannot reserve I/O port range
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
coretemp1: <CPU On-Die Thermal Sensors> on cpu1
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
coretemp2: <CPU On-Die Thermal Sensors> on cpu2
est2: <Enhanced SpeedStep Frequency Control> on cpu2
p4tcc2: <CPU Frequency Thermal Control> on cpu2
coretemp3: <CPU On-Die Thermal Sensors> on cpu3
est3: <Enhanced SpeedStep Frequency Control> on cpu3
p4tcc3: <CPU Frequency Thermal Control> on cpu3
Timecounters tick every 1.000 msec
vboxdrv: fAsync=0 offMin=0x26c offMax=0x5d8
hdacc0: <Realtek ALC269 HDA CODEC> at cad 0 on hdac0
hdaa0: <Realtek ALC269 Audio Function Group> at nid 1 on hdacc0
pcm0: <Realtek ALC269 (Analog 2.0+HP/2.0)> at nid 20,21 and 18,24 on hdaa0
hdacc1: <Intel Panther Point HDA CODEC> at cad 3 on hdac0
hdaa1: <Intel Panther Point Audio Function Group> at nid 1 on hdacc1
pcm1: <Intel Panther Point (HDMI/DP 8ch)> at nid 5 on hdaa1
random: unblocking device.
usbus0: 5.0Gbps Super Speed USB v3.0
usbus1: 480Mbps High Speed USB v2.0
usbus2: 480Mbps High Speed USB v2.0
ugen0.1: <0x8086> at usbus0
uhub0: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
ugen2.1: <Intel> at usbus2
uhub1: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
ugen1.1: <Intel> at usbus1
uhub2: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
(aprobe0:ahcich0:0:0:0): SETFEATURES ENABLE SATA FEATURE. ACB: ef 10 00 00 00 40 00 00 00 00 05 00
(aprobe0:ahcich0:0:0:0): CAM status: ATA Status Error
(aprobe0:ahcich0:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe0:ahcich0:0:0:0): RES: 51 04 00 00 00 40 00 00 00 05 00
(aprobe0:ahcich0:0:0:0): Retrying command
(aprobe0:ahcich0:0:0:0): SETFEATURES ENABLE SATA FEATURE. ACB: ef 10 00 00 00 40 00 00 00 00 05 00
(aprobe0:ahcich0:0:0:0): CAM status: ATA Status Error
(aprobe0:ahcich0:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe0:ahcich0:0:0:0): RES: 51 04 00 00 00 40 00 00 00 05 00
(aprobe0:ahcich0:0:0:0): Error 5, Retries exhausted
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <Crucial CT240M500SSD3 MU03> ATA-9 SATA 3.x device
ada0: Serial Number 1351095F93D6
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 228936MB (468862128 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad4
ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
ada1: <ST500LT012-9WS142 0001LVM1> ATA-8 SATA 2.x device
ada1: Serial Number S0VBTNS9
ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada1: quirks=0x1<4K>
ada1: Previously was known as ad6
ses0 at ahciem0 bus 0 scbus2 target 0 lun 0
ses0: <AHCI SGPIO Enclosure 1.00 0001> SEMB S-E-S 2.00 device
ses0: SEMB SES Device
Netvsc initializing... SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!
uhub0: 8 ports with 8 removable, self powered
Root mount waiting for: usbus2 usbus1 usbus0
uhub2: 2 ports with 2 removable, self powered
uhub1: 2 ports with 2 removable, self powered
ugen0.2: <vendor 0x8087> at usbus0
ugen1.2: <vendor 0x8087> at usbus1
uhub3: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus1
ugen2.2: <vendor 0x8087> at usbus2
uhub4: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus2
Root mount waiting for: usbus2 usbus1
uhub3: 6 ports with 6 removable, self powered
uhub4: 8 ports with 8 removable, self powered
ugen1.3: <Generic> at usbus1
Root mount waiting for: usbus1
ugen1.4: <Azurewave> at usbus1
Trying to mount root from ufs:/dev/ada0p2 [rw]...
wlan0: Ethernet address: 68:17:29:a1:b7:47
ubt0: <vendor 0x8087 product 0x07da, class 224/1, rev 2.00/78.69, addr 1> on usbus0
WARNING: attempt to domain_add(bluetooth) after domainfinalize()
WARNING: attempt to domain_add(netgraph) after domainfinalize()
drmn0: <Intel IvyBridge (M)> on vgapci0
info: [drm] MSI enabled 1 message(s)
info: [drm] AGP at 0xc0000000 256MB
iicbus0: <Philips I2C bus> on iicbb0 addr 0xff
iic0: <I2C generic I/O> on iicbus0
iic1: <I2C generic I/O> on iicbus1
iicbus2: <Philips I2C bus> on iicbb1 addr 0xff
iic2: <I2C generic I/O> on iicbus2
iic3: <I2C generic I/O> on iicbus3
iicbus4: <Philips I2C bus> on iicbb2 addr 0xff
iic4: <I2C generic I/O> on iicbus4
iic5: <I2C generic I/O> on iicbus5
iicbus6: <Philips I2C bus> on iicbb3 addr 0xff
iic6: <I2C generic I/O> on iicbus6
iic7: <I2C generic I/O> on iicbus7
iicbus8: <Philips I2C bus> on iicbb4 addr 0xff
iic8: <I2C generic I/O> on iicbus8
iic9: <I2C generic I/O> on iicbus9
iicbus10: <Philips I2C bus> on iicbb5 addr 0xff
iic10: <I2C generic I/O> on iicbus10
iic11: <I2C generic I/O> on iicbus11
iicbus12: <Philips I2C bus> on iicbb6 addr 0xff
iic12: <I2C generic I/O> on iicbus12
iic13: <I2C generic I/O> on iicbus13
iicbus14: <Philips I2C bus> on iicbb7 addr 0xff
iic14: <I2C generic I/O> on iicbus14
iic15: <I2C generic I/O> on iicbus15
info: [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
info: [drm] Driver supports precise vblank timestamp query.
drmn0: taking over the fictitious range 0xc0000000-0xd0000000
info: [drm] Initialized i915 1.6.0 20080730
-------------- next part --------------
device	acpi
debug.acpi.acpi_ca_version: 20130823
debug.acpi.enable_debug_objects: 0
debug.acpi.interpreter_slack: 1
debug.acpi.reset_clock: 1
debug.acpi.suspend_bounce: 0
debug.acpi.cpu_unordered: 0
debug.acpi.ec.burst: 0
debug.acpi.ec.polled: 0
debug.acpi.ec.timeout: 750
debug.acpi.batt.batt_sleep_ms: 0
debug.acpi.resume_beep: 0
hw.acpi.supported_sleep_state: S3 S4 S5
hw.acpi.power_button_state: S5
hw.acpi.sleep_button_state: S3
hw.acpi.lid_switch_state: NONE
hw.acpi.standby_state: NONE
hw.acpi.suspend_state: S3
hw.acpi.sleep_delay: 1
hw.acpi.s4bios: 0
hw.acpi.verbose: 0
hw.acpi.disable_on_reboot: 0
hw.acpi.handle_reboot: 1
hw.acpi.reset_video: 0
hw.acpi.cpu.cx_lowest: C1
hw.acpi.thermal.min_runtime: 0
hw.acpi.thermal.polling_rate: 10
hw.acpi.thermal.user_override: 0
hw.acpi.thermal.tz0.temperature: 46.0C
hw.acpi.thermal.tz0.active: -1
hw.acpi.thermal.tz0.passive_cooling: 0
hw.acpi.thermal.tz0.thermal_flags: 1
hw.acpi.thermal.tz0._PSV: 0.0C
hw.acpi.thermal.tz0._HOT: 127.0C
hw.acpi.thermal.tz0._CRT: 127.0C
hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz0._TC1: 0
hw.acpi.thermal.tz0._TC2: 0
hw.acpi.thermal.tz0._TSP: 0
hw.acpi.battery.life: 100
hw.acpi.battery.time: -1
hw.acpi.battery.state: 0
hw.acpi.battery.units: 1
hw.acpi.battery.info_expire: 5
hw.acpi.acline: 1
machdep.acpi_timer_freq: 3579545
machdep.idle_available: spin, mwait, hlt, acpi
machdep.idle: acpi
machdep.acpi_root: 1040416
dev.acpi.0.%desc: LENOVO CB-01
dev.acpi.0.%driver: acpi
dev.acpi.0.%parent: nexus0
dev.acpi_sysresource.0.%desc: System Resource
dev.acpi_sysresource.0.%driver: acpi_sysresource
dev.acpi_sysresource.0.%location: handle=\_SB_.PCI0.LPCB.LDRC
dev.acpi_sysresource.0.%pnpinfo: _HID=PNP0C02 _UID=2
dev.acpi_sysresource.0.%parent: acpi0
dev.acpi_sysresource.1.%desc: System Resource
dev.acpi_sysresource.1.%driver: acpi_sysresource
dev.acpi_sysresource.1.%location: handle=\_SB_.PCI0.LPCB.CWDT
dev.acpi_sysresource.1.%pnpinfo: _HID=INT3F0D _UID=0
dev.acpi_sysresource.1.%parent: acpi0
dev.acpi_sysresource.2.%desc: System Resource
dev.acpi_sysresource.2.%driver: acpi_sysresource
dev.acpi_sysresource.2.%location: handle=\_SB_.PCI0.PDRC
dev.acpi_sysresource.2.%pnpinfo: _HID=PNP0C02 _UID=1
dev.acpi_sysresource.2.%parent: acpi0
dev.acpi_sysresource.3.%desc: System Resource
dev.acpi_sysresource.3.%driver: acpi_sysresource
dev.acpi_sysresource.3.%location: handle=\_SB_.MEM2
dev.acpi_sysresource.3.%pnpinfo: _HID=PNP0C01 _UID=2
dev.acpi_sysresource.3.%parent: acpi0
dev.acpi_sysresource.4.%desc: System Resource
dev.acpi_sysresource.4.%driver: acpi_sysresource
dev.acpi_sysresource.4.%location: handle=\_SB_.PTID
dev.acpi_sysresource.4.%pnpinfo: _HID=INT340E _UID=0
dev.acpi_sysresource.4.%parent: acpi0
dev.cpu.0.%parent: acpi0
dev.cpu.1.%parent: acpi0
dev.cpu.2.%parent: acpi0
dev.cpu.3.%parent: acpi0
dev.hpet.0.%parent: acpi0
dev.atrtc.0.%parent: acpi0
dev.attimer.0.%parent: acpi0
dev.acpi_timer.0.%desc: 24-bit timer at 3.579545MHz
dev.acpi_timer.0.%driver: acpi_timer
dev.acpi_timer.0.%location: unknown
dev.acpi_timer.0.%pnpinfo: unknown
dev.acpi_timer.0.%parent: acpi0
dev.acpi_ec.0.%desc: Embedded Controller: GPE 0x17
dev.acpi_ec.0.%driver: acpi_ec
dev.acpi_ec.0.%location: handle=\_SB_.PCI0.LPCB.EC0_
dev.acpi_ec.0.%pnpinfo: _HID=PNP0C09 _UID=0
dev.acpi_ec.0.%parent: acpi0
dev.pci_link.0.%parent: acpi0
dev.pci_link.1.%parent: acpi0
dev.pci_link.2.%parent: acpi0
dev.pci_link.3.%parent: acpi0
dev.pci_link.4.%parent: acpi0
dev.pci_link.5.%parent: acpi0
dev.pci_link.6.%parent: acpi0
dev.pci_link.7.%parent: acpi0
dev.pcib.0.%parent: acpi0
dev.acpi_lid.0.%desc: Control Method Lid Switch
dev.acpi_lid.0.%driver: acpi_lid
dev.acpi_lid.0.%location: handle=\_SB_.LID0
dev.acpi_lid.0.%pnpinfo: _HID=PNP0C0D _UID=0
dev.acpi_lid.0.%parent: acpi0
dev.acpi_lid.0.wake: 1
dev.acpi_tz.0.%desc: Thermal Zone
dev.acpi_tz.0.%driver: acpi_tz
dev.acpi_tz.0.%location: handle=\_TZ_.TZ00
dev.acpi_tz.0.%pnpinfo: _HID=none _UID=0
dev.acpi_tz.0.%parent: acpi0
dev.atdma.0.%parent: acpi0
dev.fpupnp.0.%parent: acpi0
dev.acpi_button.0.%desc: Power Button
dev.acpi_button.0.%driver: acpi_button
dev.acpi_button.0.%location: handle=\_SB_.PCI0.LPCB.PWRB
dev.acpi_button.0.%pnpinfo: _HID=PNP0C0C _UID=0
dev.acpi_button.0.%parent: acpi0
dev.atkbdc.0.%parent: acpi0
dev.psmcpnp.0.%parent: acpi0
dev.battery.0.%parent: acpi0
dev.acpi_acad.0.%desc: AC Adapter
dev.acpi_acad.0.%driver: acpi_acad
dev.acpi_acad.0.%location: handle=\_SB_.PCI0.LPCB.ACAD
dev.acpi_acad.0.%pnpinfo: _HID=ACPI0003 _UID=0
dev.acpi_acad.0.%parent: acpi0
dev.acpi_perf.0.%driver: acpi_perf
dev.acpi_perf.0.%parent: cpu0
dev.acpi_perf.1.%driver: acpi_perf
dev.acpi_perf.1.%parent: cpu1
dev.acpi_perf.2.%driver: acpi_perf
dev.acpi_perf.2.%parent: cpu2
dev.acpi_perf.3.%driver: acpi_perf
dev.acpi_perf.3.%parent: cpu3