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- Advanced Power Management (APM) support has been in the kernel since 1.3.46.
- On laptop computers, the APM support provides access to battery status
- information and may help you to conserve battery power, depending on your
- laptop and the APM implementation.
-
- The apmd-2.1 package provides:
- 1) a new apmd(8) to provide logging of the battery status
- 2) an apm(1) utility to print /proc/apm
- 3) an xapm(1x) utility to provide a little graph in X
- 4) a libapm.a for writing similar applications
-
- The apmd-2.2 package provides:
- Support for /dev/apm_bios (10,134) which should appear in 1.3.85.
- In previous kernels, the apm_bios device was dynamically allocated.
- The apm(1) and xapm(1x) from apmd-2.1 will continue to work with these
- newer kernels, but apmd(8) will fail. The new apmd-2.2 utilities
- will work with older and newer kernels, so please upgrade to
- apmd-2.2 even if you use an older kernel.
-
- The apm-2.4 package provides:
- Support for putting the machine into standby and suspend modes
- using the -S and -s switches to the apm program.
- Support for powering down machine after kernel halts.
- Requires Linux 1.3.98 or later for new functionality
-
- All of these utilities should work with both the old (pre-1.3.58) and the
- new (1.3.58) /proc/apm format. No further changes in the /proc/apm format
- are anticipated.
-