gamescope VS Proton

I think your information is quite outdated.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

Or Valve's Proton[0], a tool for playing Windows games on Linux.

https://github.com/ValveSoftware/Proton

Did you mount it with the correct flags?

there is a hack to try and use your existing windows game install from an NTFS drive, but i don't recommend it as steam will try to save file names that are not allowed on NTFS...plus ext4 is faster.

From a quick search, here's what I found. It looks like you're encountering some common issues that can occur with games running on Linux through Proton, especially with the recent updates to games like Satisfactory that might affect compatibility. The log entries you're seeing related to D3DCompile2 failing to compile shader and the issues with Ternary operator and LinearToSrgbBranching not being defined, suggest that there's a problem with shader compilation. This can often be related to the version of Proton or the graphics drivers you are using. Some users have reported that the game does launch with the -vulkan option but with graphical glitches and lower performance, which indicates that the Vulkan renderer is working but possibly not optimally on your setup. From the discussions in the community, users have suggested ensuring that the latest drivers for your graphics card are installed and, if using an Intel GPU, that the Mesa drivers are up to date since Intel XeSS references were found in the logs. If you're using NVIDIA graphics, make sure you have the latest drivers and possibly set the PROTON_ENABLE_NVAPI=1 %command% to enable DLSS if you're under Vulkan. If you're using an Optimus laptop with both Intel and NVIDIA GPUs, make sure your Optimus setup is correctly configured. Some users have found success by specifying DXVK_FILTER_DEVICE_NAMES=GeForce to force the game to use the NVIDIA GPU. It's also worth noting that if you're encountering issues with DirectX 11, you might want to try forcing the game to use DirectX 10 if possible or look into DXVK configurations that could resolve compatibility issues. Lastly, if none of these solutions work, you could try running a trace with apitrace to gather more detailed logs that might point to the specific issue. If you're still stuck, it would be a good idea to report the issue to the Proton GitHub page or seek further assistance in the game's community forums where others might have encountered and solved similar issues. For more information and to find others who might have resolved similar issues, check out the community discussions on GitHub​​, Steam Community​​, and the DXVK GitHub page​​.

This has been reported to the proton team here : https://github.com/ValveSoftware/Proton/issues/7317