Samsung Dex not connecting to monitor

[_smasho_]

Hi, i have a tab s6lite with Oneui 3.1 and android 11

Using an external usb-c hub dex won't connect to my hdmi monitor.

What should i do? Is there something i can do to make it work? Maybe with a rom?

thanks

 

[vasek.x1]

Hi, I think you have already found the answer, but if anybody else would be looking for it, the answer is simple: unfortunately, Tab S6 lite has only USB 2.0 through the type-C connector, not USB 3.x, as the other S tablets do and as everybody would expect...

It's also unfortunate, that no review is mentioning this...

 

[gernerttl]

Hi, i have a tab s6lite with Oneui 3.1 and android 11

Using an external usb-c hub dex won't connect to my hdmi monitor.

What should i do? Is there something i can do to make it work? Maybe with a rom?

thanks

What model of USB-C hub are you using? When you plug it in, does it mirror to the monitor? If it doesn't, it's likely the hub, not the tablet. Not all of them are compatible with DeX.

Update: After doing some more research, it seems the Tab S6 Lite does not support Mobile HD Link (MHL). You can screen mirror via wireless (ChromeCast or MirrorCast), but DeX won't work.

Since it is hardware level, a custom ROM will not work.

 

[gernerttl]

Hi, I think you have already found the answer, but if anybody else would be looking for it, the answer is simple: unfortunately, Tab S6 lite has only USB 2.0 through the type-C connector, not USB 3.x, as the other S tablets do and as everybody would expect...

It's also unfortunate, that no review is mentioning this...

Absolutely not true. The Tab S6 Lite is USB 3.x compatible. It is because Samsung didn't include MHL on its Sx Lite line of tablets.

 

[vasek.x1]

Absolutely not true. The Tab S6 Lite is USB 3.x compatible. It is because Samsung didn't include MHL on its Sx Lite line of tablets.

Well, I expect the Samsung documentation doesn't lie too much: https://www.samsung.com/uk/tablets/galaxy-tab-s/galaxy-tab-s6-lite-blue-128gb-lte-sm-p615nzbebtu.

I also tested the USB speed, which is roughly about 30 MB/s, thus a bit above half of the theoretical limit of USB 2.0. It does not mean the port is not 3.x compatible (= possible to connect to USB 3.x ports...). However, it's really only USB 2.0, like on many cheap phones with type-C connector. And of course, as you have mentioned, MHL was not implemented in S6 lite's USB 2.0 port. If it would be USB 3.x, then it shall have (typically) HDMI-Alternate mode (it is true that there's no standard to this and it can support either HDMI or MHL or DisplayPort or ThunderBolt or neither of these ). And when the manufacturer would think about including MHL in USB 2.0 type-C port, then it makes technically better sense to go with USB 3.2 directly (as it uses the same number of wires and MHL or HDMI would need more hardware anyway and together it will bring more customers )... So that's why mentioning the USB 2.0 in datasheet makes sense and explains quite a lot (without searching for MHL implementation...).

 

[gernerttl]

Thanks for the correction. USB 2 is capable of screen mirroring. It needs MHL though.

 

[dimenfer]

Hi, i have a tab s6lite with Oneui 3.1 and android 11

Using an external usb-c hub dex won't connect to my hdmi monitor.

What should i do? Is there something i can do to make it work? Maybe with a rom?

thanks

there's some cables that use screencast over wire sounds a bit strange but it works relatively good, better than cast itself look at this: