Miracast - Wifi Display
Latrina Cobbett
When I connect to a TV, the wifi speed slows to a crawl. I am able to connect an old Dell XPS18 that has an AC7260 as well as a Note5 and with both of these devices, when i connect, I am able to get the full speed from the wifi (150Mbs)
Has anyone else run into this? I should note that I am running the out of the box image on my laptop and am considering wiping and doing a clean install from windows. I'm not sure if maybe there's some option set in the factory image that may cause this.
Not sure exactly what this does (or doesn't do when disabled) but I was starting to worry as from what I've been reading, this laptop is actually geared toward taking advantages of the features of WCU.
Something I just noticed though, I was testing Wifi speed with fast.com and noticed it didn't breakdown download/upload speed so I tried a few others like speedtest.net and Bing's speedtest and found that while the download speed is
Just noticed the same issue, during a local network transfer of a file while using miracast. I was getting about 3-7 Mbps transfer speed which was unacceptable. Checked the solution and after changing the value of "Receive Segment Coalescing State", i went back to full Wifi speed.
Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.
This lead me to think the autochannel feature on Meraki was the culprit, so I disabled all but 2 channels on the nearby access points but to no avail. I also tinkered with a lot of other settings in the radio settings page of the Meraki dashboard but none of those options really made a difference.
Air Marshal found the Miracast devices,but we haven't set it up to do anything with rogue ap's so they just got marked as "uncontained". To make sure Air Marshall wasn't the problem I've whitelisted the Miracast devices.
Hello - curious to hear if any resolution besides killing the 5g spectrum has worked? We are in the same scenario, as we have all our conference room TV/displays using Microsoft Wireless Display Adapters. Laptops will seemingly connect after initial power on, and then disconnect and never re-connect again.
Unfortunately no, I did not find a proper way to get it working without disabling 5Ghz in the Meraki network. Also good to know you tried using widi adapters, my next step was to buy a bunch of Miracast dongles and see if that works.
I did however have a so called "AirServer" lying around which is basically an intel nuc which supports Miracast, Airplay and Chromecast. I've tested this with the 5G network on, and for the last few months it kept running smoothly and I was able to use the Windows 10 miracast function every time.
I hope this fixed the problem for you. I remember when I was tinkering with the Meraki settings, sometimes it would just start to work again and held up for a couple days, I hope this is not the case with your setup.
Wanted to follow-up with a discovery we've had on this. The MAC whitelisting has worked on several Microsoft Surface models, and a few Lenovo ThinkPad's. We have one Dell Latitude 3379, with Intel 7265 NIC that still will not work. It initially connects to the WiDi adapter and screen, but then disconnects within 10secs. Air Marshall shows that it's whitelisted when it sees it within the Dashboard. Head scratching moment for sure....
Another follow-up: this continues to work well for us as a solution. Although tedious, we are able to one-by-one add a new laptop's WiDi adapter to the Air Marshall whitelist and have it remain connected. It would be extremely helpful to be able to leave a note/comment about who's MAC address was added, and very extremely helpful if we could get it to whitelist through to all networks.
In the Air Marshall, add an entry for Matches Wildcard and put the value of 'DIRECT-*' (without quotes). This solved my problem with miracast. If you look in the WLAN-autoconfig logs, the miracast tries to connect with a SSID that begins with DIRECT-. I hope this helps someone out because it caused me a bunch of headaches.
The various software projects that are needed for wireless displays are done by volunteers and community driven. If you want something that's currently not running or not running well: roll up your sleeves, get involved and help out.
I'll leave this open as it poses a more general question that will be applicable to a wide variety of linux systems, but be aware of our rules regarding Manjaro if you happen to have any other questions which are more specific to your system.
I was able to do a Miraclecast connection to the TV using instructions given at However, that is just that, a connection (the TV acknowledges the connection) and as explained on the same link, you need to stream a flux to get an image to your TV. The thread suggests cvlc, which used, but I did not find which app to use on the TV to read that stream. Using a Samsung phone, this works automatically, I am wondering which mechanism is behind this (maybe a specific port)? Anyway, miracast has a big disadvantage: you need to use a Wifi adapter dedicated for this, meaning you lose Internet connection on the PC.
Then I tried Steam. Steam Link app is available for Samsung smart TV. And this works great. I was able to command using a Steam Controler (in Blutooth mode) from the TV. I was also able to exit big picture, leading to being able to see and use the underlying Linux desktop. Unfortunately, I had to use a virtual keyboard, but this is a good enough solution for me. Maybe a blutooth keyboard would be useable as well?
Thank @seth @zebulon for the info.
I guess I am not the last one looking for wireless display solution on (Arch) Linux, who had some user experience with miracast/chromecast/airplay, but had not enough knowledge/experience of DIY or implementation of the subject. So to sum up:
-- As of 2020 miracast is mainly adopted by windows and the future of the protocol is still uncertain.
-- there doesn't seem to be any driven development resource on Linux about miracast.
-- gnome-network-displays might be a solution. And it doesn't stop the wifi connection. (but in my case I was trying to cast to a LG webos TV, which is on the list of tested device according to the project's Readme.md, and just got connected for one second before some error occurs.)
-- Miraclecast (cf.#5 above) is an implementation of the protocol, but one need do more to cast screen and would lost wifi internet during the casting.
This question is not really distro-specific anyhow.
I'm not sure about the technical requirements, but I'm sure people are working on it.
Searching the AUR for miracast brings up a few things. Did you delve into the topic at all?
Complaining that it isn't quite there yet is the same as complaining that they don't work fast enough.
Two ways to solve this:
As far as I understand, Samsung smart TVs from 2017 onwards have a Chromecast-like feature called "Smart View". I wonder if there is any Linux implementation that would allow to cast to a TV. Would avoid having to buy a Chromecast device.
I would like to connect my Pi 3 to a ceiling mounted projector, and send display content to it wirelessly from a Windows PC. Using something like Miracast. I have found Piracast on github, but that is only for Pi 2, with a specific dongle. Is there anything similar for Pi 3 just using the built-in wifi instead of the dongle?
I have developed lazycast that is designed to work on Raspberry Pi 3. lazycast follows (most of) the wifi display specification (commercially known as Miracast) and uses wifi p2p (commercially known as WiFi Direct) to set up a connection. I have tested it with Windows 8.1 and 10 sources. It requires no modification (using the built-in wifi) to the hardware and minimum modification to the system. I believe that this is exactly what you are looking for.
shairport-sync is an iDevice version which will allow you to setup AirPlay to stream audio to your device. However, if you are lucky enough to still be on iOS 8.xx you will also have the ability to mirror your display. Unfortunately, with the newest updates from Apple, the mirror functionality doesn't work from any devices running 9.xx +You can find it here:
Providing that you've set up your Pi's wifi network (otherwise follow a tutorial on how to use hostapd), you can easily use the DLNA function built right into Windows to send media content from your PC to your Pi.
First, you want to be running Kodi on your pi. Then enable the UPnP client and connect to your pi's network from the PC. Then you want to right click media files that will now appear with a cast to option. Make sure you have enable network discovery! For streaming with other programs such as Edge, follow this.
Have a look at the UV4L demo and this post and the following posts on the Raspberry Pi forum for a working command line. I think UV4L is actually the simplest way, as it does not require any configuration. It can cast the screen, a tab, a window and the camera from Firefox plugin-free after having set the proper authorization (i.e. the host where UV4L is running) in the config/preferences.
I use Miracast on a regular basis to connect wireless display to my TV with a Microsoft wireless display adapter. My laptop all of the sudden will no longer let me connect to a wireless display. The button that I used to click disappeared. And it now tells me that my computer does not support wireless display.
This has happened to me before and I was able to fix it by reinstalling the graphics display driver back to the old version. I tried this and it was unsuccessful. I am fairly sure it has something to do with Windows or a driver but I cannot figure it out.
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