As is usual with mysterious "permission denied" errors, SELinux was the underlying cause. ...
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ID▼ Status Resolution▲ Sev Product Comp Assignee Reporter Summary
41823 NEW --- nor Sisyphus plasma5- zerg alimektor /proc/interrupts недоступен для чтения

File a new bug in the "plasma5-kinfocenter" component of the "Sisyphus" product