gamescope VS xdg-desktop-portal

I think your information is quite outdated. The HWC overlay planes are heavily used, you can see this trivially just doing a 'dumpsys SurfaceFlinger' or grabbing a systrace/perfetto trace. When it falls back to GPU composition it's very obvious as there's a significant hit to latency and more GPU contention.

The overlay capabilities of the modern Snapdragons are also quite absurd. They support like upwards of a dozen overlays now and even have FP16 extended sRGB support. Some HWCs (like the one in the steam deck) even have per plane 3D LUTs for HDR tone mapping (ex https://github.com/ValveSoftware/gamescope/blob/master/src/d... )

The composition is bandwidth heavy of course, but for static scenes there's a cache after the HWC in the form of panel self refresh.

One of the unfortunate things about Wayland is every compositor will have its own quality of implementation affecting things like latency.

With XOrg, especially in the pre-compositing days, you could choose whatever WM you want and it wouldn't have any impact on the rendering performance of X clients. Once the Composite extension was added and everyone started running composited X desktops, that started to change, and the increased latency already started appearing - in an arguably worse architecture than Wayland because there were often three processes involved with lots of IPC per draw: X-Client->X-Server->X-Compositor->X-Server->CRTC. At least in Wayland it's more like Wayland-Client->Wayland-Compositor->CRTC.

If you're unhappy with the rendering latency of your Wayland sessions, it may be worth trying alternative compositors... they likely vary significantly. The Valve/Steam folks have made a minimal one specifically optimized for games/low-latency [0]. I doubt the SteamDeck would be seeing as much success as it is if Wayland were so problematic in this department.

[0]: https://github.com/ValveSoftware/gamescope

Use gamescope.

While streaming from the Deck to another device (phone with Steam Link app or another PC running steam), taking a screenshot on the Deck (hold the steam or ... button, and press R1) crashes the session (https://github.com/ValveSoftware/gamescope/issues/961). This one also impacts Decky Recorder. If you're recording the screen or have replay mode on and take a screenshot, you'll have a crash.

Mangohud (GOverlay), libstrangle, gamescope. Pick your poison.

Hey folks. I've got a 11900H motherboard and use the iGPU and stock Intel graphics drivers that I keep current. Even at baseline (so without overclocking of any kind, with good Corsair memory sticks configured without XMP and regardless of voltage), I would be able to use Windows 11 and the CMD or Terminal programs without issue but after some time they would be corrupt and unreadable. The fix was in Terminal, go into Settings, then Render, and turn on Software Rendering. I hope this helps someone else. FYI the corruption was very much like other Intel UHD graphics samples reported in this link: https://github.com/ValveSoftware/gamescope/issues/356

>Not losing all the work every time your windows manager crashes

https://news.ycombinator.com/item?id=37509703

>remapping keys

>Use xinput to change parameters of their input devices (libinput dropped most configuration options present with evdev)

Up to the compositor.

>Global shortcuts

Also up to the compositor. Was added to xdp in https://github.com/flatpak/xdg-desktop-portal/blob/main/data... so it's up to the compositor's xdp impl to provide it. It was created by a KDE dev so I assume KDE implements it at least.

>tunnelling over ssh

https://gitlab.freedesktop.org/mstoeckl/waypipe

> - O proper screen recording support

Works just fine. I use OBS.

> - broken screen sharing

Never had any trouble with it.

> - No proper global keyboard shortcut

> - No push to talk support

On its way: https://github.com/flatpak/xdg-desktop-portal/pull/711 / https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.free...

> - Several problems with multiple screens

Haven't had any more than on X11, but then again I do use Nvidia hardware on Linux.

It might help, but at this point Linux containers can't really stabilize the whole environment, especially for games. Particular pain points include accelerated graphics (which theoretically can have a stable kernel interface, but in practice is so complex and performance-sensitive that it's not stable enough to be a "reference platform", so to speak) and modern game controllers (which present a whole mess of concerns typically "addressed" in Flatpak by granting the device=all permission and hoping for the best [1]).

I also know a guy who ran into issues with a kernel update breaking a custom allocator, although I don't know the fine details. That wasn't for a game, but games also use custom allocators for various reasons.

[1] https://github.com/flatpak/xdg-desktop-portal/issues/536

I don't use Wayland, but it seems xdg-desktop-portal since 1.16.0 has a 'Global Shortcuts portal'. Perhaps check it out.

https://github.com/flatpak/xdg-desktop-portal

It's being discussed: https://github.com/flatpak/xdg-desktop-portal/issues/611

The first bug report was filed in early 2022 but unfortunately no progress yet on the matter, even after numerous similar reports ever since.

Yeah been having the same issue since I changed to using the unstable branch, supposedly noticed and fixed upstream for a few variants of the problem (different people with different configurations of DE and xdg-* deps installed report the same issue due to timeouts of the other portals)