Why do you care so much about uptime? The datetime stamps in /var/log/messages will tell you when the system started shutting down, assuming it does a 'proper' shutdown, not an instant off kind of thing.
Why do you care so much about uptime? The datetime stamps in /var/log/messages will tell you when the system started shutting down, assuming it does a 'proper' shutdown, not an instant off kind of thing.
It's easy enough to figure out when the system booted (that's in the log), and when it shut down. Either the shutdown is in the log, or regular log updates from other subsystems stop happening. Then calculate the difference yourself.
It's easy enough to figure out when the system booted (that's in the log), and when it shut down. Either the shutdown is in the log, or regular log updates from other subsystems stop happening. Then calculate the difference yourself.
There are probably some ACPI battery signals that throw a message at XX amount of time before battery depletion.
But realistically with no power there is no log entry written.
But it depends on signals received. In some cases the computer may be shutdown by ACPI signals and other case just run to death.
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