The412BannerandThe412Banner
bc01b77752
* Force SSBS for a game's Wine: libssbs.so, opt in per game Wine's arm64 signal code resumes threads from a Windows CONTEXT whose Cpsr never carries PSTATE.SSBS, so every signal return leaves the thread running with speculative store bypass disabled - slower on cores such as Oryon. Bannerlator fixes it in its own Wine builds (force_ssbs.diff, Sonicadvance1) and with an LD_PRELOAD adapter for layers it cannot rebuild. DroidDeck's Protons (Valve, GE, CachyOS ARM64) come prebuilt from Steam but run the same aarch64 Wine signal path, so the adapter applies here: tools/linuxfs/ssbs/ssbs_adapter.c, the same source built for glibc (+ sysv_signal), staged to /usr/local/lib/libssbs.so. droiddeck-game-env preloads it when the game's (or the shared) environment sets DROIDDECK_FORCE_SSBS=1, and only into an ARM64 Proton. Off unless asked for: the gain is unproven on Snapdragon 8 Gen 3. For testing: SSBS_ADAPTER_OBSERVE=1 counts without changing anything (the baseline) and SSBS_ADAPTER_DEBUG=1 logs the fixes; both also count signals that ARRIVE while a thread runs without SSBS, which shows whether anything besides signal returns clears it. Checked on an ARM64 Linux kernel: a handler that clears SSBS left 4 of 5 later signals arriving with it clear; with the adapter, 0 of 5. * Force SSBS: a switch under the FEX preset in Steam settings Steam settings > Games gets "Force SSBS" right under the FEX preset, off unless turned on. Like the preset it goes into the game environment's defaults (DROIDDECK_FORCE_SSBS=1), published at once and read by droiddeck-game-env on the next game launch, so a game's own environment can still set it to 0. Measured on the device with the adapter's counters (AYANEO Pocket FIT, DiRT 3 on GE-Proton11-7-aarch64): observing only, 8192 of 8277 signals found the thread running without SSBS; with the adapter, none did - it keeps the bit set everywhere Wine clears it, as a rebuilt ntdll would. The speed-up itself is reported on Oryon cores and was not measurable on the FIT's 8 Gen 3, hence off by default. --------- Co-authored-by: The412Banner <the412banner@users.noreply.github.com>
DroidDeck brings the SteamOS experience to Android: Valve's Steam client in Big Picture on your Adreno handheld, with Windows games through Valve's ARM64 Proton.
Note: DroidDeck does not have a stand-alone website. Do not click on any download links from websites claiming to be the DroidDeck team.
Requirements and install
Use Android 9 or newer on a supported Adreno device (730 or newer, or 8xx). Adreno 6xx is experimental: DirectX 11 uses DXVK 2 and may run, and DirectX 12 games can still crash. Mali, Xclipse, PowerVR, and Adreno 710 are unsupported. No root is required. Allow about 3 GB for the runtime and 1.1 GB more for the desktop and emulators. Install the APK from Releases, install the Linux runtime, then press Play and sign in. Steam downloads on first launch. Install Desktop & apps to use the desktop and emulators. The Store installs Linux apps and games from Flathub (ARM64 builds) with Flatpak; with additional options to install Appimages and set up scripts.
Before Steam launches, you must turn off Restrict child processes in Developer options. If this option is not available in developer settings (Android 12 and 13 devices), first launch of Steam will present a "Fix it for me" button, which will help automate the setup process.
Community
Join the DroidDeck Discord for help, Preview builds, and device reports. Bug reports go in its #bug-reports forum; attach the session folder from Download/DroidDeck/ so the logs come with it.
Build
Run tools/build_local.sh with Docker, Java 17, the Android SDK/NDK, and zstd installed. It builds the ARM64 audio sinks from PulseAudio 13.0 and packages them into the APK at app/build/outputs/apk/release/app-release.apk. Set DROIDDECK_PA13_SOURCE_DIR to an existing PulseAudio 13.0 source directory to skip downloading it. To install the APK on an attached device, run tools/deploy_local.sh.
Limits
Compatibility and performance vary by device; hardware validation is limited. Desktop compositing uses software rendering. Firefox sandboxing is reduced under proot. See the session logs in Download/DroidDeck/ when diagnosing problems.
Credits and licence
GPL-3.0. Runtime, shim, input, and controller work build on WinNative and Bannerlator (maxjivi05). LSFG frame generation is from the work of Camille LaVey and the Eden emulator project, following lsfg-vk, ported to WinNative and DroidDeck by @maxjivi05; it needs your own copy of Lossless Scaling and ships none of its shaders. x86 AppImages, and any whose own runtime cannot unpack them, are unpacked with uruntime by VHSgunzo (MIT), shipped unmodified with its licence. See LICENSE. Steam and Proton belong to Valve Corporation; this project is not affiliated with Valve.