sys-suspend(1) [opensolaris man page]
sys-suspend(1) User Commands sys-suspend(1) NAME
sys-suspend - suspend or shutdown the system and power off SYNOPSIS
/usr/bin/sys-suspend [-fnxh][-d displayname] DESCRIPTION
sys-suspend provides options to suspend or shutdown the whole system. A system can be suspended to conserve power or to prepare the system for transport. The suspend should not be used when performing any hardware reconfiguration or replacement. In case of suspend, the current system state is preserved either by keeping memory powered (Suspend to RAM), or by saving the state to non- volatile storage (Suspend to Disk) until a resume operation is performed by power on or a wake-up event. On a resume in the windows environment, the system brings up lockscreen to ensure that only the authorized person has access to the system. In a non-windows environment, the user is prompted for password. It is possible that when devices or processes are performing critical or time sensitive operations (such as real time operations) the sys- tem fails to suspend. When this occurs, the system remains in its current running state. Messages reporting the failure are displayed on the console or system log. Once the system is successfully suspended, the resume operation always succeed barring external influences such as hardware reconfiguration or the like. In case of shutdown, the system responds as if poweroff(1M) was performed. This command enforces the solaris.system.power.suspend. authorizations. On a default install these are associated with the console user. Other users need to include these authorizations or include the Suspend profile. OPTIONS
The following operands are supported: -d displayname Connect to the X server specified by displayname. -f Force suspend. Causes a poweroff(1M) to occur if the suspend fails. System state are not be saved, and a normal boot follows. -h Change the default from suspend to shutdown. -n Do not display messages or request user intervention. -x Disable lockscreen. This flag disables the execution of lockscreen at resume time. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWpmowu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
halt(1M), powerd(1M), poweroff(1M), shutdown(1M), attributes(5), cpr(7) SunOS 5.11 10 Mar 2009 sys-suspend(1)
Check Out this Related Man Page
cpr(7) Device and Network Interfaces cpr(7) NAME
cpr - Suspend and resume module SYNOPSIS
/platform/'uname -m'/kernel/misc/cpr DESCRIPTION
The cpr module is a loadable module used to suspend and resume the entire system. You may wish to suspend a system to save power or to power off temporarily for transport. The cpr module should not be used in place of a normal shutdown when performing any hardware reconfig- uration or replacement. In order for the resume operation to succeed, it is important that the hardware configuration remain the same. When the system is suspended, the entire system state is preserved in non-volatile storage until a resume operation is conducted. dtpower(1M) or power.conf(4) are used to configure the suspend-resume feature. The speed of suspend and resume operations can range from 15 seconds to several minutes, depending on the system speed, memory size, and load. During resume operation, the SIGTHAW signal is sent to all processes to allow them to do any special processing in response to suspend- resume operation. Normally applications are not required to do any special processing because of suspend-resume, but some specialized pro- cesses can use SIGTHAW to restore the state prior to suspend. For example, X can refresh the screen in response to SIGTHAW. In some cases the cpr module may be unable to perform the suspend operation. If a system contains additional devices outside the standard shipped configuration, it is possible that device drivers for these additional devices might not support suspend-resume operations. In this case, the suspend fails and an error message is displayed. These devices must be removed or their device drivers unloaded for the suspend operation to succeed. Contact the device manufacturer to obtain a new version of device driver that supports suspend-resume. A suspend may also fail when devices or processes are performing critical or time-sensitive operations (such as realtime operations). The system will remain in its current running state. Messages reporting the failure will be displayed on the console and status returned to the caller. Once the system is successfully suspended the resume operation will succeed, barring external influences such as a hardware recon- figuration. Some network-based applications may fail across a suspend and resume cycle. This largely depends on the underlying network protocol and the applications involved. In general, applications that retry and automatically reestablish connections will continue to operate transparently on a resume operation; those applications that do not will likely fail. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcpr | +-----------------------------+-----------------------------+ |Interface stability |Unstable | +-----------------------------+-----------------------------+ SEE ALSO
dtpower(1M) (OpenWindows Reference Manual), pmconfig(1M), uadmin(1M), uadmin(2), power.conf(4), attributes(5) Using Power Management Writing Device Drivers NOTES
Certain device operations such as tape and floppy disk activities are not resumable due to the nature of removable media. These activities are detected at suspend time, and must be stopped before the suspend operation will complete successfully. Suspend-resume is currently supported only on a limited set of hardware platforms. Please see the book Using Power Management for a com- plete list of platforms that support system Power Management. See uname(2) to programatically determine if the machine supports suspend- resume. SunOS 5.10 7 May 2001 cpr(7)