We are trying to get FirefoxOS to use multiple outputs (HDMI devices) simultaneously in the way to show applications running on either of the screens (presumably different apps on different screens). Has anyone tried it?
There's a proof-of-concept demonstration of multiple screen feature on Firefox OS.
https://www.youtube.com/watch?v=A9QbW-paPZo
You can contact the author for further information.
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Hello I am currently trying to draw directly to two screens directly via framebuffer. However the current system I am working with only creates one framebuffer for both devices (HDMI and DP) I am trying to avoid using a windows manager but would welcome any other ideas.
I have been working with web-bluetooth for the past several months on iOS and ChromeOS without any problems. But today, I tried to run some of my examples on Windows for the first time, and to my surprise, most of the things I had implemented didn't work with Windows. I am able to successfully connect to my peripheral, but whenever I try reading or writing anything to a custom service with a custom characteristic, I get the error "GATT operation not authorized". I have tried looking around but there is no information anywhere about this.
I am including below the simplest example I have which is just for turning the LEDs on / off on an nrf52832 board. There is only one custom service and one custom characteristic implemented, the value of which controls the states of the LEDs. This works without any problems on Chromebooks and Macs but does not work on Windows. Here is the link to this simple project including the embedded code and the web-app.
https://github.com/shtarbanov/WebBluetooth-Feather-nRF52832/tree/master/LED%20Control
I have made two implementations of the same thing, one based on promises and another based on async-await located in the folders "WebApp (Async)" and "WebApp (Promises)", respectively. Both of those implementations work fine on Mac and Cromebook, but not on Windows.
It is a known issue that secure characteristics are not accessible using Web Bluetooth on Windows. On other platforms the pairing occurs automatically, but not on Windows. There is an issue tracking this:
https://bugs.chromium.org/p/chromium/issues/detail?id=960258
Stuck with this also and as for workaround i can recommend for windows platform to pair device firstly using windows itself and than to pair it via browser(as a workaround). Not much but hope this helps, at list a little.
P.S. it should be paired via windows only once, so PC will remember device, and than you can pair via browser as long as PC remembers device.
My laptop's processor doesn't support SLAT so I can't run the WP8 emulator on my laptop and use that to take screenshots.
I have a Lumia 920 and I can take screenshots with it, but only for one of the three screen sizes available on Windows Phone.
Is there any way to take screenshots for all the different screen sizes in this case?
I had the same problem. There is not a way to have your Lumia 920 render in a different resolution if that's what you're asking. This makes verifying those resolutions pretty tough. It really makes you have to trust in your layout that your application can scale correctly.
To get the screenshots, I used my Lumia 920 to take screenshots, then I used paint.net to resize the images to the correct sizes for the store requirements. It's a little misleading to the user but it's all you can do without having the devices you need to test.
Other options would be to reach out to your local Microsoft developer evangelist to see if you can get a device to test those resolutions. Then if all else fails and you're still not comfortable shipping your app without testing on those resolutions you can always find a developer friend that is willing to run your app on their emulator.
If you're using a Windows Phone 8, you can just press the Power and Start buttons simultaneously to take a screenshot.
I know you can connect to a remote X11 server to use them like a local X11 system.
My question is: Can you connect multiple computers to work together and display (through their videos outputs) an unique instance of X11 desktop?
Or, another phrasing: Can you process and display an image using several X11 servers?
Take a look at Distributed Multihead X Project
X11 is a protocol. If you use it over the network, the GUI application that you run remotely, actually connects to your local X11 server. So yes, you can have multiple clients running applications on the server that display on different X11 servers. As for processing images using X11 server - what do you actually mean by that? The only thing comes to mind is multiple monitors. If so, then yes - you can use a dedicated X11 server per monitor.
If I understood your question correctly, you want to have multiple computers collaborate on displaying a single X11 display. This is not directly possible.
However, you can have multiple video cards in a single computer and use the Xinerama extension to have the multiple cards show a single logical X server. This can allow you to use a single machine to drive several monitors with ease. (With video cards that support multiple outputs, you ought to be able to get up to four or six monitors without too much hassle. Dozens might be very difficult.)
I can't think of any mechanism that would allow a single keyboard and mouse to reliably work across multiple monitors driven by multiple computers. But if your problem is significantly restricted (if it really is just viewing an image via several X servers), then you could write a client application that renders only a portion of the image and run multiple clients that each display only a portion of the image -- that when taken together, looks like the image is seamlessly displayed by several systems simultaneously. This is definitely a bit awkward though, as the coordination of the system will require some thought.
If you want to drag windows from one screen to another, or display a part of a window here and another part of it there, then no, this is not possible with existing out-of-the-box software. You can try to modify a "virtual" X server such as Xephyr such that it uses multiple backend X servers for portions of its framebuffer. This is not exactly trivial but should be much easier than writing your own multi-box X server from scratch.
If you want to clone one desktop to many displays connected to different computers, you can try running VNC or RDP clients on all displays but one.
Have 4 DVI output. Seems I hopefully will have driver support on this. Details are sketchy online about supporting 4 outputs, but seems possible.
My question is from the Linux group and Virtualbox pros.... Will the seamless method of VirtualBox allow me to use all 3 of my monitors for multiscreen. I'd like to stick with Ubuntu and run Visual C# and other tools from my VirtualBox. Compiz effects are just too amazing to want Aero Glass.
What do you think, will my system be able to use the multiple monitors with VirtualBox and this graphics card? I've googled for hours and am still searching for answers.
Edit:
I tried virtualbox last night. Pretty slick, though I had an error in installing Visual C#NET. However, it wouldn't let you drag between multiple screens??? Is this something the host must resolve, or does the guest session need to have special settings for multiple monitors? Haven't been able to find anything in google supporting multiple monitors with virtualbox.
You should be able to configure your screens just fine. Don't know the exact details for an ATI setup, but you should be able to use Xinerama to create a single large virtual desktop, and then just run VirtualBox (though honestly, I prefer KVM, which runs on modern CPUs which provide native virtualization support) full-screen on one of those monitors. You would then be able to have three screens dedicated to Ubuntu, and the forth dedicated to Windows.
You might want to look into the non-Xinerama method of multiple displays. Each display is then treated as its own screen (so you'd have :0.0, :0.1, :0.2, and :0.3 for your X displays). You cannot move applications between the screens, but you get four independent desktops. I personally find that more useful than the idea of a single stretched desktop over multiple displays; when I used a laptop as my primary system, that's what I did, and when I get a second monitor for my computer, I'll likely return to that means of doing things. You'll have to investigate the specifics for such a setup with ATI, but the X server supports it, so it's just a matter of looking at your ATI driver's documentation to put the pieces together.