Support us on Patreon to keep GamingOnLinux alive. This ensures all of our main content remains free for everyone with no article paywalls. Just good, fresh content! Alternatively, you can donate through PayPal, Liberapay or Buy us a Coffee. You can also buy games using our partner links for GOG and Humble Store.

Here we go again, ahead of the weekend a fresh version of Proton Experimental has gone live allowing you to test the latest adjustments for playing Windows games on Linux. If you're not clear on what Proton and Steam Play are, be sure to check out our constantly updated dedicated page.

For Proton Experimental as of July 29, 2021 here's what's changed:

  • It notes that Microsoft Flight Simulator from Steam is now playable
  • Support was added for copy/paste in the Origin launcher
  • An update for wine-mono to 6.3.0 which should fix more launchers

Need to know how to actually use Proton Experimental? Here's a simple HOWTO (as it's not complicated!). Make sure it's installed by searching for it in your Steam Library, then select it from the Compatibility menu in the Properties section of a game. See our quick video below:

For an explainer in text form:

  1. Search for Proton Experimental and install if not already.
  2. Right click any game on Steam and go to Properties.
  3. Select the Compatibility menu on the right side.
  4. Ensure the "Force the use of a specific Steam Play compatibility tool" is ticked.
  5. From the dropdown box that appears select Proton Experimental.
Article taken from GamingOnLinux.com.
Tags: Steam Play, Meta, Wine
17 Likes
We do often include affiliate links to earn us some pennies. We are currently affiliated with GOG and Humble Store. See more here.
About the author -
author picture
I am the owner of GamingOnLinux. After discovering Linux back in the days of Mandrake in 2003, I constantly came back to check on the progress of Linux until Ubuntu appeared on the scene and it helped me to really love it. You can reach me easily by emailing GamingOnLinux directly.
See more from me
8 comments

The_Aquabat 29 Jul
I heard that what was not working was the online part, downloading the map data.. is that fixed?
Linas 29 Jul
View PC info
  • Supporter Plus
I wonder if they are ever going to officially support Media Foundation? There are so many games that work just fine, except missing video playback.
1xok 29 Jul
Quoting: LinasI wonder if they are ever going to officially support Media Foundation? There are so many games that work just fine, except missing video playback.

True. Could be a license problem.
Liam Dawe 30 Jul
Quoting: LinasI wonder if they are ever going to officially support Media Foundation? There are so many games that work just fine, except missing video playback.
As I understand, part of what they're doing is some sort of re-encoding on Steam servers into a format Proton can work with. Don't quote me on it, but I'm sure I saw one of the people involved mentioning it. That, and they're telling developers to avoid it.
Termy 30 Jul
Quoting: 1xok
Quoting: LinasI wonder if they are ever going to officially support Media Foundation? There are so many games that work just fine, except missing video playback.

True. Could be a license problem.

thats what i heard, yeah. Downloading GEs proton is not a huge obstacle for most of us, but not really the proper answer to what valve set out to offer with the Deck...
Linas 30 Jul
View PC info
  • Supporter Plus
Quoting: Liam Dawe
Quoting: LinasI wonder if they are ever going to officially support Media Foundation? There are so many games that work just fine, except missing video playback.
As I understand, part of what they're doing is some sort of re-encoding on Steam servers into a format Proton can work with. Don't quote me on it, but I'm sure I saw one of the people involved mentioning it. That, and they're telling developers to avoid it.
If true, that's very a interesting approach. In theory, they would only need a single Windows server (probably many more in practice) to run the re-encoding jobs without any license violations.

Although this would go against Valve's approach of solving the general problem. Identifying where and how videos are used in each game sounds like a lot of work. Just think of all those games that package the data files in some weird formats. It's not like there is any standard here.
Cestus 30 Jul
me in 1999 using Mandrake linux being told linux would run AAA games like Microsoft Flight Simulator...
i would have passed out with joy at the idea alone!
Quoting: Liam Dawe
Quoting: LinasI wonder if they are ever going to officially support Media Foundation? There are so many games that work just fine, except missing video playback.
As I understand, part of what they're doing is some sort of re-encoding on Steam servers into a format Proton can work with. Don't quote me on it, but I'm sure I saw one of the people involved mentioning it. That, and they're telling developers to avoid it.

This is correct. It's a module called media-converter (written in Rust). From the Proton github repo:

QuoteThis module is a gstreamer plugin which provides the ability to replace media
data encoded in certain formats with media encoded in another format. There
are two main components, `videoconv` for converting video data provided to
Quartz and Media Foundation, and `audioconv` for converting audio data
provided to XAudio2.

The broad idea is to hash the incoming data and replace it with data looked up
from a cache. If there is a cache miss, then the data is recorded to disk and
instead replaced by "blank" media. The conversion should be transparent to the
application (Wine, FAudio) so no changes are required to the application.


Last edited by rustybroomhandle on 31 July 2021 at 8:05 am UTC
While you're here, please consider supporting GamingOnLinux on:

Patreon, Liberapay or PayPal Donation.

This ensures all of our main content remains totally free for everyone with no article paywalls. We also don't have tons of adverts, there's also no tracking and we respect your privacy. Just good, fresh content. Without your continued support, we simply could not continue!

You can find even more ways to support us on this dedicated page any time. If you already are, thank you!
Login / Register

Or login with...
Sign in with Steam Sign in with Twitter Sign in with Google
Social logins require cookies to stay logged in.

Livestreams & Videos
Community Livestreams