Mac OS X 10.11.3: Led Cinema Display outputs speaker static from speakers until AppleHDA.kext is unloaded
| Originator: | avedesk | ||
| Number: | rdar://24397748 | Date Originated: | 28-Jan-2016 11:35 PM |
| Status: | Open | Resolved: | |
| Product: | OS X | Product Version: | Mac OS X 10.11.3 (15D21) |
| Classification: | Crash/Hang/Data Loss | Reproducible: | Sometimes |
Summary: When my 27" Led Cinema Display monitor is connected to my Retina MacBook Pro 13" Mid 2014,white noise continuously comes out of the Led Cinema Display’s speakers, resulting in a low buzzing noise. Unloading AppleHDA.kext stops the constant buzzing sound after about 30 seconds, until sound is outputed: sudo kextunload /System/with kextunload Library/Extensions/AppleHDA.kext Steps to Reproduce: 1. Hook up a 27" Led Cinema Display to a rMBP 13" Mid 2014 2. Listen closely to the displays speakers Expected Results: A white noise can be clearly heard! Actual Results: A very irritating white sound! Regression: Notes: See for a more detailed description: https://techblog.willshouse.com/2014/01/21/fix-thunderbolt-display-static-noise-on-os-x-mavericks/ The following Terminal command stops the buzzing sound, until a system sound is played. sudo kextunload /System/Library/Extensions/AppleHDA.kext
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