swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
- v6.0-rc5
- v6.0-rc4
- v6.0-rc3
- v6.0-rc2
- v6.0-rc1
- v5.9-rc8
- v5.9-rc7
- v5.9-rc6
- v5.9-rc5
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- v5.9-rc1
- v5.9
- v5.8-rc7
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- v5.8-rc5
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- v5.8-rc3
- v5.8-rc2
- v5.8-rc1
- v5.8
- v5.7-rc7
- v5.7-rc6
- v5.7-rc5
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- v5.7
- v5.6-rc7
- v5.6-rc6
- v5.6-rc5
- v5.6-rc4
- v5.6-rc3
- v5.6-rc2
- v5.6-rc1
- v5.6
- v5.5-rc7
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- v5.5-rc5
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- v5.4
- v5.3-rc8
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- v5.3-rc5
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- v5.3
- v5.2-rc7
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- v5.2-rc5
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- v5.2
- v5.19-rc8
- v5.19-rc7
- v5.19-rc6
- v5.19-rc5
- v5.19-rc4
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- v5.19-rc2
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- v5.19
- v5.18-rc7
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- v5.18
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- v5.17-rc6
- v5.17-rc5
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- v5.17
- v5.16-rc8
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- v5.16
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- v5.15-rc6
- v5.15-rc5
- v5.15-rc4
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- v5.15-rc1
- v5.15
- v5.14-rc7
- v5.14-rc6
- v5.14-rc5
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- v5.14-rc2
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- v5.14
- v5.13-rc7
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- v5.13-rc5
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- v5.13-rc2
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- v5.13
- v5.12-rc8
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- v5.12-rc6
- v5.12-rc5
- v5.12-rc4
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- v5.12
- v5.11-rc7
- v5.11-rc6
- v5.11-rc5
- v5.11-rc4
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- v5.11-rc2
- v5.11-rc1
- v5.11
- v5.10-rc7
- v5.10-rc6
- v5.10-rc5
- v5.10-rc4
- v5.10-rc3
- v5.10-rc2
- v5.10-rc1
- v5.10
- v5.1-rc7
- v5.1-rc6
- v5.1-rc5
- v5.1-rc4
- v5.1-rc3
- v5.1-rc2
- v5.1-rc1
- v5.1
- v5.0-rc8
- v5.0-rc7
- v5.0-rc6
- v5.0-rc5
- v5.0-rc4
- v5.0-rc3
- v5.0-rc2
- v5.0-rc1
- v5.0
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- v4.9-rc7
- v4.9-rc6
- v4.9-rc5
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- v4.9-rc3
- v4.9-rc2
- v4.9-rc1
- v4.9
- v4.8-rc8
- v4.8-rc7
- v4.8-rc6
- v4.8-rc5
- v4.8-rc4
- v4.8-rc3
- v4.8-rc2
- v4.8-rc1
- v4.8
- v4.7-rc7
- v4.7-rc6
- v4.7-rc5
- v4.7-rc4
- v4.7-rc3
- v4.7-rc2
- v4.7-rc1
- v4.7
- v4.6-rc7
- v4.6-rc6
- v4.6-rc5
- v4.6-rc4
- v4.6-rc3
- v4.6-rc2
- v4.6-rc1
- v4.6
- v4.5-rc7
- v4.5-rc6
- v4.5-rc5
- v4.5-rc4
- v4.5-rc3
- v4.5-rc2
- v4.5-rc1
- v4.5
- v4.4-rc8
- v4.4-rc7
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- v4.4-rc5
- v4.4-rc4
- v4.4-rc3
- v4.4-rc2
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- v4.4
- v4.3-rc7
- v4.3-rc6
- v4.3-rc5
- v4.3-rc4
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- v4.3
- v4.20-rc7
- v4.20-rc6
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- v4.20-rc2
- v4.20-rc1
- v4.20
- v4.2-rc8
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- v4.2-rc5
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- v4.2
- v4.19-rc8
- v4.19-rc7
- v4.19-rc6
- v4.19-rc5
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- v4.19
- v4.18-rc8
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- v4.18-rc6
- v4.18-rc5
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- v4.18-rc3
- v4.18-rc2
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- v4.18
- v4.17-rc7
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- v4.17-rc5
- v4.17-rc4
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- v4.17-rc2
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- v4.17
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- v4.16-rc6
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- v4.16-rc4
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- v4.16
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- v4.15
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- v4.14
- v4.13-rc7
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- v4.13-rc5
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- v4.13
- v4.12-rc7
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- v4.12-rc5
- v4.12-rc4
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- v4.12
- v4.11-rc8
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- v4.11-rc5
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- v4.11-rc1
- v4.11
- v4.10-rc8
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- v4.10-rc6
- v4.10-rc5
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- v4.10
- v4.1-rc8
- v4.1-rc7
- v4.1-rc6
- v4.1-rc5
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- v4.1-rc3
- v4.1-rc2
- v4.1-rc1
- v4.1
- v4.0-rc7
- v4.0-rc6
- v4.0-rc5
- v4.0-rc4
- v4.0-rc3
- v4.0-rc2
- v4.0-rc1
- v4.0
- v3.9-rc8
- v3.9-rc7
- v3.9-rc6
- v3.9-rc5
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- v3.9-rc2
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- v3.9
- v3.8-rc7
- v3.8-rc6
- v3.8-rc5
- v3.8-rc4
- v3.8-rc3
- v3.8-rc2
- v3.8-rc1
- v3.8
- v3.7-rc8
- v3.7-rc7
- v3.7-rc6
- v3.7-rc5
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- v3.7-rc2
- v3.7-rc1
- v3.7
- v3.6-rc7
- v3.6-rc6
- v3.6-rc5
- v3.6-rc4
- v3.6-rc3
- v3.6-rc2
- v3.6-rc1
- v3.6
- v3.5-rc7
- v3.5-rc6
- v3.5-rc5
- v3.5-rc4
- v3.5-rc3
- v3.5-rc2
- v3.5-rc1
- v3.5
- v3.4-rc7
- v3.4-rc6
- v3.4-rc5
- v3.4-rc4
- v3.4-rc3
- v3.4-rc2
- v3.4-rc1
- v3.4
- v3.3-rc7
- v3.3-rc6
- v3.3-rc5
- v3.3-rc4
- v3.3-rc3
- v3.3-rc2
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- v3.3
- v3.2-rc7
- v3.2-rc6
- v3.2-rc5
- v3.2-rc4
- v3.2-rc3
- v3.2-rc2
- v3.2-rc1
- v3.2
- v3.19-rc7
- v3.19-rc6
- v3.19-rc5
- v3.19-rc4
- v3.19-rc3
- v3.19-rc2
- v3.19-rc1
- v3.19
- v3.18-rc7
- v3.18-rc6
- v3.18-rc5
- v3.18-rc4
- v3.18-rc3
- v3.18-rc2
- v3.18-rc1
- v3.18
- v3.17-rc7
- v3.17-rc6
- v3.17-rc5
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- v3.17-rc2
- v3.17-rc1
- v3.17
- v3.16-rc7
- v3.16-rc6
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- v3.15-rc8
- v3.15-rc7
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- v3.15
- v3.14-rc8
- v3.14-rc7
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- v3.14
- v3.13-rc8
- v3.13-rc7
- v3.13-rc6
- v3.13-rc5
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- v3.13-rc3
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- v3.13
- v3.12-rc7
- v3.12-rc6
- v3.12-rc5
- v3.12-rc4
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- v3.12-rc2
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- v3.12
- v3.11-rc7
- v3.11-rc6
- v3.11-rc5
- v3.11-rc4
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- v3.11-rc2
- v3.11-rc1
- v3.11
- v3.10-rc7
- v3.10-rc6
- v3.10-rc5
- v3.10-rc4
- v3.10-rc3
- v3.10-rc2
- v3.10-rc1
- v3.10
- v3.1-rc9
- v3.1-rc8
- v3.1-rc7
- v3.1-rc6
- v3.1-rc5
- v3.1-rc4
- v3.1-rc3
- v3.1-rc2
- v3.1-rc10
- v3.1-rc1
- v3.1
- v3.0-rc7
- v3.0-rc6
- v3.0-rc5
- v3.0-rc4
- v3.0-rc3
- v3.0-rc2
- v3.0-rc1
- v3.0
- v2.6.39-rc7
- v2.6.39-rc6
- v2.6.39-rc5
- v2.6.39-rc4
- v2.6.39-rc3
- v2.6.39-rc2
- v2.6.39-rc1
- v2.6.39
- v2.6.38-rc8
- v2.6.38-rc7
- v2.6.38-rc6
- v2.6.38-rc5
- v2.6.38-rc4
- v2.6.38-rc3
- v2.6.38-rc2
- v2.6.38-rc1
- v2.6.38
- v2.6.37-rc8
- v2.6.37-rc7
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- v2.6.37-rc5
- v2.6.37-rc4
- v2.6.37-rc3
- v2.6.37-rc2
- v2.6.37-rc1
- v2.6.37
- v2.6.36-rc8
- v2.6.36-rc7
- v2.6.36-rc6
- v2.6.36-rc5
- v2.6.36-rc4
- v2.6.36-rc3
- v2.6.36-rc2
- v2.6.36-rc1
- v2.6.36
- v2.6.35-rc6
- v2.6.35-rc5
- v2.6.35-rc4
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- v2.6.35
- v2.6.34-rc7
- v2.6.34-rc6
- v2.6.34-rc5
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- v2.6.34
- v2.6.33-rc8
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- v2.6.33-rc2
- v2.6.33-rc1
- v2.6.33
- v2.6.32-rc8
- v2.6.32-rc7
- v2.6.32-rc6
- v2.6.32-rc5
- v2.6.32-rc4
- v2.6.32-rc3
- v2.6.32-rc1
- v2.6.32
- v2.6.31-rc9
- v2.6.31-rc8
- v2.6.31-rc7
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- v2.6.31-rc5
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- v2.6.31-rc3
- v2.6.31-rc2
- v2.6.31-rc1
- v2.6.31
- v2.6.30-rc8
- v2.6.30-rc7
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- v2.6.30-rc2
- v2.6.30-rc1
- v2.6.30
- v2.6.29-rc8
- v2.6.29-rc7
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- v2.6.29-rc2
- v2.6.29-rc1
- v2.6.29
- v2.6.28-rc9
- v2.6.28-rc8
- v2.6.28-rc7
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- v2.6.28
- v2.6.27-rc9
- v2.6.27-rc8
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- v2.6.27-rc2
- v2.6.27-rc1
- v2.6.27
- v2.6.26-rc9
- v2.6.26-rc8
- v2.6.26-rc7
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- v2.6.26-rc5
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- v2.6.26-rc3
- v2.6.26-rc2
- v2.6.26-rc1
- v2.6.26
- v2.6.25-rc9
- v2.6.25-rc8
- v2.6.25-rc7
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- v2.6.25-rc1
- v2.6.25
- v2.6.24-rc8
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- v2.6.24-rc1
- v2.6.24
- v2.6.23-rc9
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- v2.6.23-rc1
- v2.6.23
- v2.6.22-rc7
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- v2.6.22-rc3
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- v2.6.22-rc1
- v2.6.22
- v2.6.21-rc7
- v2.6.21-rc6
- v2.6.21-rc5
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- v2.6.21-rc1
- v2.6.21
- v2.6.20-rc7
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- v2.6.20-rc5
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- v2.6.20-rc3
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- v2.6.20-rc1
- v2.6.20
- v2.6.19-rc6
- v2.6.19-rc5
- v2.6.19-rc4
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- v2.6.19-rc2
- v2.6.19-rc1
- v2.6.19
- v2.6.18-rc7
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- v2.6.18
- v2.6.17-rc6
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- v2.6.17-rc2
- v2.6.17-rc1
- v2.6.17
- v2.6.16-rc6
- v2.6.16-rc5
- v2.6.16-rc4
- v2.6.16-rc3
- v2.6.16-rc2
- v2.6.16-rc1
- v2.6.16
- v2.6.15-rc7
- v2.6.15-rc6
- v2.6.15-rc5
- v2.6.15-rc4
- v2.6.15-rc3
- v2.6.15-rc2
- v2.6.15-rc1
- v2.6.15
- v2.6.14-rc5
- v2.6.14-rc4
- v2.6.14-rc3
- v2.6.14-rc2
- v2.6.14-rc1
- v2.6.14
- v2.6.13-rc7
- v2.6.13-rc6
- v2.6.13-rc5
- v2.6.13-rc4
- v2.6.13-rc3
- v2.6.13-rc2
- v2.6.13-rc1
- v2.6.13
- v2.6.12-rc6
- v2.6.12-rc5
- v2.6.12-rc4
- v2.6.12-rc3
- v2.6.12-rc2
- v2.6.12
- v2.6.11-tree
Permalinks
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Tip revision: cd52d1ee9a92587b242d946a2300a3245d3b885a authored by Linus Torvalds on 12 November 2005, 01:43:36 UTC
Linux v2.6.15-rc1
Linux v2.6.15-rc1
Tip revision: cd52d1e
interface.txt
Power Management Interface
The power management subsystem provides a unified sysfs interface to
userspace, regardless of what architecture or platform one is
running. The interface exists in /sys/power/ directory (assuming sysfs
is mounted at /sys).
/sys/power/state controls system power state. Reading from this file
returns what states are supported, which is hard-coded to 'standby'
(Power-On Suspend), 'mem' (Suspend-to-RAM), and 'disk'
(Suspend-to-Disk).
Writing to this file one of those strings causes the system to
transition into that state. Please see the file
Documentation/power/states.txt for a description of each of those
states.
/sys/power/disk controls the operating mode of the suspend-to-disk
mechanism. Suspend-to-disk can be handled in several ways. The
greatest distinction is who writes memory to disk - the firmware or
the kernel. If the firmware does it, we assume that it also handles
suspending the system.
If the kernel does it, then we have three options for putting the system
to sleep - using the platform driver (e.g. ACPI or other PM
registers), powering off the system or rebooting the system (for
testing). The system will support either 'firmware' or 'platform', and
that is known a priori. But, the user may choose 'shutdown' or
'reboot' as alternatives.
Reading from this file will display what the mode is currently set
to. Writing to this file will accept one of
'firmware'
'platform'
'shutdown'
'reboot'
It will only change to 'firmware' or 'platform' if the system supports
it.