Chrome Version       : 69.0.3497.120
OS Version: 10895.78.0
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What steps will reproduce the problem?
1. Connect an extra screen (e.g. a projector)
2. Set a lower-than-maximum resolution for the extra screen
3. Turn on mirroring

What is the expected result?
- The extra screen should keep its (lower) resolution during mirroring

What happens instead of that?
- The extra screen switches to maximum resolution, before turning on mirroring.

Why is this a problem?
- If the screen reports it can handle a very large resolution at high refresh rate, then that is what will be used during mirroring. That is a lot of data that has to be transferred. It is very demanding of the cable or wifi used for transmission of the picture signal. I guess that is a factor in both the analog (VGA) as well as digital case (HDMI).

At our school it means that we cannot use mirroring with many of our projectors.

(I think the bug was introduced earlier this fall, cause my coworkers say all our projectors worked fine in August.)

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