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Update: If you're having mouse problems since this update, there's a new Beta to opt into. See here for the details.

A brand new update to Steam Play Proton has arrived ahead of the weekend with Proton 4.11-10, giving out of the box play for Halo: The Master Chief Collection.

For Halo, you will need the Steam Beta Client if you're on an older distribution, plus online matchmaking still won't work due to Easy Anti-Cheat not supporting Steam Play Proton. However, single-player does work fine and you should be able to play with friends outside of matchmaking. I've tested Halo myself, and it does work first time without issues signing into Live:

Also added in this release of Proton is a claim of major mouse handling improvements. They said this improved the experience in Fallout 4, Furi, and Metal Gear Solid V. On the subject of input there's also force feedback improvements, an Xbox controller performance regression was solved, and fixes for multiple games having problems with controller mapping like Telltale games with Xbox controllers and Cuphead and ICEY when using PlayStation 4 controllers over Bluetooth.

There's a new integer scaling mode available, which they said will "give sharp pixels when upscaling". You can enable it with the "WINE_FULLSCREEN_INTEGER_SCALING=1" environment variable.

Apart from that there's a fix for Metal Gear Solid V hanging on launch, Trine 4 should no longer be locked to 30 FPS and a frequent IL-2 Sturmovik crash should be solved. They also updated D9VK, FAudio and pulled in some misc DXVK bugfixes.

See the changelog here. To get the update, your Steam client should download it automatically. If not, ensure you have Proton 4.11 installed in the Tools menu.

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BielFPs 13 December 2019 at 5:48 pm UTC
Quotean Xbox controller performance regression

This version has a regression or fixed it? I'm a little confuse in this part
Liam Dawe 13 December 2019 at 5:51 pm UTC
Quotean Xbox controller performance regression

This version has a regression or fixed it? I'm a little confuse in this part

Last edited by Liam Dawe on 13 December 2019 at 5:51 pm UTC
Comandante Ñoñardo 13 December 2019 at 6:09 pm UTC
Time to retest Fallout 4, then.
ving2004 13 December 2019 at 6:23 pm UTC
Xbox Controller in Final Fantasy XIII/XIII-2 ?
Luke_Nukem 13 December 2019 at 7:10 pm UTC
This fixes what were some pretty bad FFB faults for steering wheels in a few driving games. link
holisticboy 13 December 2019 at 10:53 pm UTC
Absolutely awesome news regarding Halo. If I got some time, I am going to do a bit of a Co-op test with a two linux client setup to see if that is stable! I have planned a LAN party on the 27th of December, so hoping that it can be my first Linux only LAN party (all with triple AAA games to boot!)
Werner 13 December 2019 at 11:21 pm UTC
Luke_NukemThis fixes what were some pretty bad FFB faults for steering wheels in a few driving games. link

finally awesome work from berarma and aeikum
14 14 December 2019 at 12:15 am UTC
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I can't believe I'm thinking about buying Halo to play on Linux and be able to do co-op!
Schattenspiegel 14 December 2019 at 1:23 am UTC
should you guys not at least wait till they released more then one game of the collection?
BrazilianGamer 14 December 2019 at 3:48 am UTC
A W E S O M E. Anticheat though, boooooooooo
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