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S7+ External monitor support in Dex mode broken in Android 12 update

(Topic created on: 08-02-2022 09:14 PM)
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Members_EYEM16S
Student
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I have been been using Dex with a wired monitor on my s7+ for some time now, but as soon as I installed the Android 12 update my tablet will only do screen mirroring in Dex mode.

 

 

 

Any solutions to this..?

 

 

 

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6 REPLIES 6
Obsydian
Samsung Members Star ★
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I find Dex wired is a nightmare, well was until i swapped to a Spigen cable, since then no issues with either my 32" or 43" Samsung M70A monitors
Regards Obsydian - (Car & Tech Evangelist)

MY DEVICES: ZFold4, Watch6 Classic, Book2 Pro i5 5G [Laptop], Buds Pro2, M70A 32 & 43”; [Monitor], Smart Tags, Dell Inspiron G5 [Laptop] / FAMILY DEVICES: ZFlip3, ZFlip4, ZFlip5, Watch6 Classic, S8 Ultra; S7+ [Tablet],  Buds Pro, iPhone 12, iPad Air 2, Air tags, iPad Mini 5, iPad Pro 12.9 GEN2 [Tablets] / HOME DEVICES: QN95A [TV], Q900A / SWA900S [Soundbar, Rears], MC28M6075 and MC32K7055 [Microwave], Jet 75 Complete (Vacuum), Samsung Level [Speaker]
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Members_EYEM16S
Student
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Just found a solution to this.... I went into Settings>Samsung Dex then I turned on "Auto start when HDMI is connected", I suddenly get a message that screen mirroring is being disabled, then hay presto.. I now have Dex working correctly again... how odd..

 

 

GabrielGon
Journeyman
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Thank you so much 

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Slusho
First Poster
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Thanks for this, it fixed it for me on my Tab S7+. However, most of the options in the menu that appear once you're running DeX are grayed out when plugged into a monitor, and more importantly, that option isn't available on phones (at least my S21 Ultra) so this does not fix it on my phone.

03patelm
First Poster
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Hi, did you ever find a fix to this?

 

I have a note 10+ and a s7+ tablet and when i try connecting the tablet to my monitor it does not work. The phone on the other hand works perfectly fine! On both these Occasions i used the same adaptor (original apple usb c to hdmi adaptor).

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cameroninok
First Poster
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I know this is a few months old, but you fixed my problem. Thank you!

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