Lumia 950XL - Project My Screen not working after Win10 1803 Update - Black Screen

Anonymous
2018-05-17T12:08:56+00:00

I use my 950XL extensively for demos of my company's software because it's much better display than my iPhone and doesn't need additional apps to do it.

I updated my Win10 desktop today to 1803 and also my phone updated to .104 and the app no longer works.

When I open the app I get the message on the phone to ask if I want to share and I agree. The display on the desktop is black, but I can actually start applications on the phone by clicking inside the black window, so there obviously is a connection, just no display.

I was working perfectly, but not now.

As a workaround, is it possible to use continuum? I'm sure there used to be an option to display the phone's screen rather than a full desktop to the connected display but that appears to be no longer available

Thanks,

Chris

***Moved from: Mobile Devices / Microsoft Lumia and Nokia Lumia / Continuum / 900-series.***

Windows for home | Windows 10 | PC projection

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Anonymous
    2018-06-18T16:59:46+00:00

    I have recompile the project with VS2017 and target 17134(RS4) and it works with my Lumia 1020 (on W10M) fairly well. But are no remote inputs from the software possible?

    Personally all I want is to display the screen on the desktop so this would be great.

    Could you please post (or create a fork on GitHub) and I'll try it with the official 1803 release, my Lumia 950XL and a Lumia 650?

    Thanks, great work.

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  2. Anonymous
    2018-06-18T16:44:40+00:00

    I have recompile the project with VS2017 and target 17134(RS4) and it works with my Lumia 1020 (on W10M) fairly well. But are no remote inputs from the software possible?

    I can imagine that a simple recompilation for Windows 10 would be sufficient for the ProjectMyScreen app.

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  3. Anonymous
    2018-06-18T12:40:12+00:00

    Looking through the code I noticed the line:

    #define PROJECTION_CLIENT_MAX_IMAGE_BUF_SIZE 0xC8600 //854 * 480(16bit)

    Could the fact that the screen resolution I'm trying to project is 2560 x 1440 cause problems?

    I don't know what Lumia phones have a resolution of 854 x 480 but if anyone has one it may be worth testing. If it works it may be possible just to change some of the buffer sizes and get it working for larger screens. Beyond my capability but may be within others'.

    My opinion is that that line defines the buffer of the app, rather than the definition of a phone screen. 

    We don't know even if 4 years ago that app  was working, and if it did it was with phones of those years, most probably running Win 8 or Win 8.1... Win 10 was not around yet, I guess...

    I'm not a software guy, but looking at the source coding, I did see lines dealing with phone resolutions, meant to find out which was the one of the phone connected in a certain moment.

    I have also , just looking to the site in the net, the feeling that the author stopped any development/update to newer O.S.

    I brought up this reverse engineered app subject in the hope that somebody, even today still running a Win8 or Win 8.1 phone , could use that app as a temporary alternative to the official ProjectMyScreen app , in the meantime that MS solves the problem ( if ever they would do it... Windows phone is dead.. regretfully ).

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  4. Anonymous
    2018-06-18T09:38:24+00:00

    Yes, that so nearly works! I wish MS would just fix the proper version though.

    Looking through the code I noticed the line:

    #define PROJECTION_CLIENT_MAX_IMAGE_BUF_SIZE 0xC8600 //854 * 480(16bit)

    Could the fact that the screen resolution I'm trying to project is 2560 x 1440 cause problems?

    I don't know what Lumia phones have a resolution of 854 x 480 but if anyone has one it may be worth testing. If it works it may be possible just to change some of the buffer sizes and get it working for larger screens. Beyond my capability but may be within others'.

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  5. Anonymous
    2018-06-17T16:10:04+00:00

    Did you try using the keyboard commands too?  E.g. B, F and R are off and orientation is Portrait?  What about the Landscape controls?  Can you change the display with them?  FWIW I have never seen the app in Landscape but I have never had a session with it either.

    The reverse engineered app works in a different way : you change orientation using the "Display" on the menu top line instead of using the keyboard. 

    .

    And yes, it works :

    Also,  playing with it I did see a phone reboot, once.

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