Very odd: faint high-pitched noise from my Dell XPS 13 when plugged into an external monitor with its own display off goes away when its own display is turned on. Tested under Pop!_OS 20.04.
(Documenting it here in case anyone else runs into it.)
High pitched noise from the monitor is usually a sign the GPU is pushing to high a frequency. It also can signal a deficiency in the monitor, due to age or quality or defect. Left too long like this and the monitor will soon be toast.
@retiredguru Odd thing is, the high pitched noise is coming from the laptop *when its screen is off* but it’s connected to an external monitor (not from the external monitor). When the laptop’s screen is on also, no noise. Odd.
@aral I think it's called "coil whine", it's been notoriously bad on the XPS lineup. I had it on my 9360
🤷 idk why, an electronics expert could probably answer it correctly - I guess it's because the electricity is being restricted - I think it's most common with capacitors
Its trying to communicate with the aliens
Stay away from it
@aral My XPS 13 does the same thing, it's the "coil whine" I think.
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