Add to README gamescope+mangohud hack?

[ca5ua1]

I have exact same issue as in #70 (comment)_

And the fix works fine, otherwise most of my games won't work with gamescope + mangohud (it is actually why I didn't used it entire time)

This put me on the right track though I had to modify it a little:
MANGOHUD=0 gamescope -- mangohud %command%
This way the game starts with mangohud. Setting MANGOHUD=1 before the gamescope command would result in the same segfault.

So, let's add this to README.md

[Joshua-Ashton]

Probably makes more sense to just use mangoapp instead of mangohud when using gamescope

[ca5ua1]

What is actually mangoapp, I've never heard of it and can't find a clue what is it (except some mentions in mangohud code)?

[GithubUser5462]

I was able to find this in the release notes of MangoHud Version 0.6.6:

Mangoapp - This is an application that is designed to be run together with gamescope and rendered on top of gamescope

[Samsagax]

I was able to find this in the release notes of MangoHud Version 0.6.6:

Mangoapp - This is an application that is designed to be run together with gamescope and rendered on top of gamescope

Current ArchLinux package does not compile that binary. The usage is simple, just run it after the gamescope program.

[ca5ua1]

Plus to that, Lutris don't use mangoapp, so there is still a reason to add that hack until mangohud 0.6.6 not released and Lutris don't use mangoapp with gamescope.

I'm gonna add an issue on lutris github.

[aqxa1]

Is there a way to run mangoapp with a Steam game, short of running the whole Steam client in gamescope? As I don't see the wrapper approach working since I can't see how the game itself can be backgrounded before calling mangoapp from "launch options", unless there is some syntax I'm not aware of.

[Billli11]

Is there a way to run mangoapp with a Steam game, short of running the whole Steam client in gamescope? As I don't see the wrapper approach working since I can't see how the game itself can be backgrounded before calling mangoapp from "launch options", unless there is some syntax I'm not aware of.

I currently running mangoapp with

gamescope {gamescope arg} -e -- bash -c "mangoapp & gamemoderun  %command% ; kill -s TERM \$(jobs -pr)"

mangoapp have problem self terminate for me,so I have to kill the program after the game is close.

[Samsagax]

gamescope {gamescope arg} -e -- bash -c "mangoapp & gamemoderun  %command% ; kill -s TERM \$(jobs -pr)"

I think the line should be:

gamescope {gamescope arg} -e -- bash -c " gamemoderun %command% &; mangoapp"

The first part gamemoderun %command% & will start the game and put it in the background, the second part mangoapp will launch mangoapp, the colon is the line separator of bash.

[Billli11]

gamescope {gamescope arg} -e -- bash -c "mangoapp & gamemoderun  %command% ; kill -s TERM \$(jobs -pr)"

I think the line should be:

gamescope {gamescope arg} -e -- bash -c " gamemoderun %command% &; mangoapp"

The first part gamemoderun %command% & will start the game and put it in the background, the second part mangoapp will launch mangoapp, the colon is the line separator of bash.

"&" is also a separator (see bash reference manual 3.2.4). And it cause syntax error(zsh work though).

bash: -c: line 1: syntax error near unexpected token `;'
bash: -c: line 1: `echo 1 &; echo 2'

bash version 5.1.16

Also I find mangoapp won't terminate itself when the games is stopped so I have to run mangoapp as background job and add a kill command to run after the game is exited. I currently running on wayland so this may cause by running on nested wayland.

[Chromiell]

Sorry if I'm resuscitating an old Issue, but has anyone found a way to launch gamescope under Heroic Games Launcher together with mangoapp? Being that the syntax is rather strict and needs the gamescope -- sh -c "mangoapp& whateverCommand" in order to function properly is there a way to rewrite it without having to use the quotes since the wrapper in Heroic Games Launcher automatically adds the launching arguments and there's no way to specify %command%" to close the quotation like there is for Steam? I'm sorry if this isn't the right place to ask, but I figured since it's already been discussed I might give it a shot since this problem is driving me crazy.