This effectively reverts commit67acde4869. After commits569ad251adand67acde4869, -EACCES errors are ignored, and thus 'udevadm trigger' succeeds even when it is invoked by non-root users. Moreover, on -EACCES error, log messages are shown in debug level, so usually we see no message, and users are easily confused why uevents for devices are not triggered.
System and Service Manager
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