The driver logs those messages when it re-probes the connected display devices. If this happens with high frequency, then it’s either because a display device is triggering rapid hot-plug/unplug events, or because some X client is triggering a re-probe frequently. This sometimes happens with third-party “system monitor”-type applications that query the NV-CONTROL or XRandR extensions frequently. If you’re running an application like that, please try disabling it to see if these messages go away.
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