Is the rtcwake command useful for debugging?
The rtcwake command sets RTC wakeup time only. Don’t suspend, but read RTC device until alarm time appears. This mode is useful for debugging. Some PC systems can’t currently exit sleep states such as mem using only the kernel code accessed by this driver.
Who is the author of the rtcwake program?
The program was posted several times on LKML and other lists before appearing in kernel commit message for Linux 2.6 in the GIT commit 87ac84f42a7a580d0dd72ae31d6a5eb4bfe04c6d. The program was written by David Brownell and improved by Bernhard Walle . This is free software.
Is the rtcwake command supported by ACPI?
Not officially supported by ACPI, but usually working. Don’t suspend. The rtcwake command sets RTC wakeup time only. Don’t suspend, but read RTC device until alarm time appears. This mode is useful for debugging. Some PC systems can’t currently exit sleep states such as mem using only the kernel code accessed by this driver.
How to use rtcwake ( 8 ) in Linux man page?
Most platforms can implement those without analogues of BIOS, APM, or ACPI. On some systems, this can also be used like nvram-wakeup, waking from states like ACPI S4 (suspend to disk). Not all systems have persistent media that are appropriate for such suspend modes. Be verbose. Display a short help message that shows how to use the program.
Is there a way to disable the rtcwake alarm?
Not officially supported by ACPI, but it usually works. no Don’t suspend, only set the RTC wakeup time. on Don’t suspend, but read the RTC device until an alarm time appears. This mode is useful for debugging. disable Disable a previously set alarm. show Print alarm information in format: “alarm: off|on “.
Is there a warranty for the use of rtcwake?
There is NO WARRANTY, to the extent permitted by law. For bug reports, use the issue tracker at https://github.com/karelzak/util-linux/issues . The rtcwake command is part of the util-linux package which can be downloaded from Linux Kernel Archive < https://www.kernel.org/pub/linux/utils/util-linux/ >.