From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen <keld-6PR53cSIHaE@public.gmane.org>
Subject: shutting down individual devices
Date: Tue, 20 Jul 2004 15:51:43 +0200
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Hi

I would like to shut down a few devices individually.
The devices I try to shut down are:

The modem 
The sound system

I think I can save about 2 W in this way, as lspci -vvx
reports an AuxCurrent of 375 mA - I think this is at 3,3 V
on my Acer TM233 laptop, so that would be about 1 W each, giving me
about 30 minutes extra of battery life.

I do this by echo -n 3 >/sys/devices/pci*/*/power/state
and then I verified that the state was changed to 3.

But lspci -vvx (reproduced below) says that the devices are still in D0.
Is this an error? Do I need to shut down drivers before I shut down the
drivers in this way, or would the kernel do that automatically for me?

kernel 2.6.7 

best regards
keld

lspci -vvx:

00:00.0 Host bridge: Intel Corp. 82845G/GL [Brookdale-G] Chipset Host
Bridge (rev 03)
        Subsystem: Unknown device 17c0:2056
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
        Latency: 0
        Region 0: Memory at e0000000 (32-bit, prefetchable) [size=256M]
        Capabilities: [e4] #09 [1105]
00: 86 80 60 25 06 01 90 20 03 00 00 06 00 00 00 00
10: 08 00 00 e0 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 c0 17 56 20
30: 00 00 00 00 e4 00 00 00 00 00 00 00 00 00 00 00
 
00:02.0 VGA compatible controller: Intel Corp. 82845G/GL [Brookdale-G]
Chipset Integrated Graphics Device (rev 03) (prog-if 00 [VGA])
        Subsystem: Unknown device 17c0:2056
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 10
        Region 0: Memory at d8000000 (32-bit, prefetchable) [size=128M]
        Region 1: Memory at d0000000 (32-bit, non-prefetchable)
[size=512K]
        Capabilities: [d0] Power Management version 1
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00: 86 80 62 25 07 00 90 00 03 00 00 03 00 00 00 00
10: 08 00 00 d8 00 00 00 d0 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 c0 17 56 20
30: 00 00 00 00 d0 00 00 00 00 00 00 00 0a 01 00 00
 
00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 02)
(prog-if 00 [UHCI])
        Subsystem: Unknown device 17c0:4002
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 10
        Region 4: I/O ports at 1800 [size=32]
00: 86 80 c2 24 05 00 80 02 02 00 03 0c 00 00 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 18 00 00 00 00 00 00 00 00 00 00 c0 17 02 40
30: 00 00 00 00 00 00 00 00 00 00 00 00 0a 01 00 00
 
00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 02)
(prog-if 00 [UHCI])
        Subsystem: Unknown device 17c0:4002
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin B routed to IRQ 11
        Region 4: I/O ports at 1820 [size=32]
00: 86 80 c4 24 05 00 80 02 02 00 03 0c 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 21 18 00 00 00 00 00 00 00 00 00 00 c0 17 02 40
30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00
 
00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 02)
(prog-if 00 [UHCI])
        Subsystem: Unknown device 17c0:4002
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin C routed to IRQ 11
        Region 4: I/O ports at 1840 [size=32]
00: 86 80 c7 24 05 00 80 02 02 00 03 0c 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 41 18 00 00 00 00 00 00 00 00 00 00 c0 17 02 40
30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 03 00 00
 
00:1d.7 USB Controller: Intel Corp. 82801DB USB2 (rev 02) (prog-if 20
[EHCI])
        Subsystem: Unknown device 17c0:1071
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin D routed to IRQ 11
        Region 0: Memory at d0080000 (32-bit, non-prefetchable)
[size=1K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [58] #0a [2080]
00: 86 80 cd 24 06 01 90 02 02 20 03 0c 00 00 00 00
10: 00 00 08 d0 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 c0 17 71 10
30: 00 00 00 00 50 00 00 00 00 00 00 00 0b 04 00 00
 
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB/EB PCI Bridge (rev 82)
(prog-if 00 [Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR+
        Latency: 0
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
        I/O behind bridge: 00003000-00003fff
        Memory behind bridge: d0100000-d01fffff
        BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
00: 86 80 4e 24 07 01 80 80 82 00 04 06 00 00 01 00
10: 00 00 00 00 00 00 00 00 00 02 02 20 30 30 80 22
20: 10 d0 10 d0 f0 ff 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 00
 
00:1f.0 ISA bridge: Intel Corp. 82801DB LPC Interface Controller (rev
02)
        Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
00: 86 80 c0 24 0f 00 80 02 02 00 01 06 00 00 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
00:1f.1 IDE interface: Intel Corp. 82801DB Ultra ATA Storage Controller
(rev 02) (prog-if 8a [Master SecP PriP])
        Subsystem: Unknown device 17c0:4002
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 11
        Region 0: I/O ports at <ignored>
        Region 1: I/O ports at <ignored>
        Region 2: I/O ports at <ignored>
        Region 3: I/O ports at <ignored>
        Region 4: I/O ports at 1860 [size=16]
        Region 5: Memory at 10000000 (32-bit, non-prefetchable)
[size=1K]
00: 86 80 cb 24 07 00 80 02 02 8a 01 01 00 00 00 00
10: f1 01 00 00 f5 03 00 00 71 01 00 00 75 03 00 00
20: 61 18 00 00 00 00 00 10 00 00 00 00 c0 17 02 40
30: 00 00 00 00 00 00 00 00 00 00 00 00 ff 01 00 00
 
00:1f.3 SMBus: Intel Corp. 82801DB/DBM SMBus Controller (rev 02)
        Subsystem: Unknown device 17c0:4002
        Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin B routed to IRQ 10
        Region 4: I/O ports at 1880 [size=32]
00: 86 80 c3 24 01 00 80 02 02 00 05 0c 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 81 18 00 00 00 00 00 00 00 00 00 00 c0 17 02 40
30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00
 
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio
Controller (rev 02)
        Subsystem: Unknown device 17c0:2005
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin B routed to IRQ 10
        Region 0: I/O ports at 1c00 [size=256]
        Region 1: I/O ports at 18c0 [size=64]
        Region 2: Memory at d0080c00 (32-bit, non-prefetchable)
[size=512]
        Region 3: Memory at d0080800 (32-bit, non-prefetchable)
[size=256]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00: 86 80 c5 24 07 00 90 02 02 00 01 04 00 00 00 00
10: 01 1c 00 00 c1 18 00 00 00 0c 08 d0 00 08 08 d0
20: 00 00 00 00 00 00 00 00 00 00 00 00 c0 17 05 20
30: 00 00 00 00 50 00 00 00 00 00 00 00 0b 02 00 00
 
00:1f.6 Modem: Intel Corp. 82801DB AC'97 Modem Controller (rev 02)
(prog-if 00 [Generic])
        Subsystem: Unknown device 17c0:1069
        Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin B routed to IRQ 10
        Region 0: I/O ports at 2400 [size=256]
        Region 1: I/O ports at 2000 [size=128]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00: 86 80 c6 24 01 00 90 02 02 00 03 07 00 00 00 00
10: 01 24 00 00 01 20 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 c0 17 69 10
30: 00 00 00 00 50 00 00 00 00 00 00 00 0b 02 00 00
 
02:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
        Subsystem: Unknown device 17c0:1053
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (8000ns min, 16000ns max)
        Interrupt: pin A routed to IRQ 11
        Region 0: I/O ports at 3000 [size=256]
        Region 1: Memory at d0100000 (32-bit, non-prefetchable)
[size=256]
        Expansion ROM at <unassigned> [disabled] [size=64K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00: ec 10 39 81 07 01 90 02 10 00 00 02 00 20 00 00
10: 01 30 00 00 00 00 10 d0 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 c0 17 53 10
30: 00 00 00 00 50 00 00 00 00 00 00 00 0b 01 20 40
 
02:09.0 CardBus bridge: O2 Micro, Inc. OZ6912 Cardbus Controller
        Subsystem: Unknown device 17c0:3102
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping+ SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 168
        Interrupt: pin A routed to IRQ 10
        Region 0: Memory at 10001000 (32-bit, non-prefetchable)
[size=4K]
        Bus: primary=02, secondary=03, subordinate=06, sec-latency=176
        Memory window 0: 10400000-107ff000 (prefetchable)
        Memory window 1: 10800000-10bff000
        I/O window 0: 00004000-000040ff
        I/O window 1: 00004400-000044ff
        BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset- 16bInt+
PostWrite+
        16-bit legacy interface ports at 0001
00: 17 12 72 69 87 00 10 04 00 00 07 06 00 a8 02 00
10: 00 10 00 10 a0 00 00 02 02 03 06 b0 00 00 40 10
20: 00 f0 7f 10 00 00 80 10 00 f0 bf 10 01 40 00 00
30: fd 40 00 00 01 44 00 00 fd 44 00 00 00 01 80 05
40: c0 17 02 31 01 00 00 00 00 00 00 00 00 00 00 00
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00



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