Avoid exiting when CPU power sensor is unavailable - #113
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Summary
Avoid terminating the application when the Intel RAPL CPU power sensor is unavailable.
The current implementation exits when this path cannot be read:
/sys/class/powercap/intel-rapl/intel-rapl:0/energy_uj
This prevents the display from receiving any data on AMD systems where Intel RAPL is not present.
Change
Return a fallback power value of 0 instead of exiting the process when the power sensor cannot be read.
Tested on
The display now starts correctly and continues updating automatically through a systemd user service.