ubuntu-phone team mailing list archive

[Michal Suchanek <hramrach@xxxxxxxxx>]

Hello,

On 13 January 2016 at 13:28, Eric Holmi <empholmi@xxxxxxxxx> wrote:
> While connected to Wi-Fi, could you send a packet containing screen
> information to the default loopback address and have the CPU forward that to
> the USB output?

There are USB HDMI dongles which actually contain some graphics
hardware (as opposed to MHL cables that use some passive or very
simple part to switch on the MHL output on devices which have one).
These are mostly designed for USB3 because USB2 has low bandwidth and
the controller is very inefficient WRT amount of CPU time spent on
amount of data transferred.

That said, if you purchase such a dongle you can connect it to your
phone so long as it has USB host capability (most do unless it is
disabled in software).

An example of such dongle is this a Dell 492-BBNU or Dell D3100 (the
former very compact, the latter self-powered). Both are marketed as
notebook USB docking solution.

I do not know if the chipset in either of these docking solutions is
supported by the kernel in Ubuntu Touch or Linux in general but many
similar products exist and at least some are supported by in-kernel
drivers.

The last possible thing is to use an arbitrary networking protocol
(Miracast, VNC, ....) for transferring the display data over network.

HTH

Michal