This looks like a line of interest from the log: fixme:dxva2:DXVA2CreateDirect3DDeviceManager9 (0x118ff00c, 0x118ff054): stub
Possible lines of interest for the crash: err:service:process_send_command receiving command result timed out
fixme:service:scmdatabase_autostart_services Auto-start service L"WineBus" failed to start: 1053
I did a crazy/maybe useless hack to the cutscenes because I don't wanted wait the Media Foundation implementation.
The shit working: https://www.youtube.com/watch?v=nE9NX73JJaQ
I'm confident that what I did (A very crazy hack) will be never implemented, then I just will left the comments to who want too, because maybe can work with more game as well.
To begin, what my hack do is expose the linux API to the applications running under the wine, then he will hook the game CreateFile calls and wait to he trying open a video file (he will check the file extension), after that he will use the linux API to run the MPV in fullscreen and hide the game window, after the MPV finish the playback the hack will detect and show the game window again, then you can resume playing.
As you can see is something very crazy, but works in cases that the game just skip the cutscene without crash and just wait for the next user input.
With all that said still have one problem to this game works:
The Fairy Fencer F Advent Dark Force count how many times the Media Foundation failed, then after the 2° fail he just stop try open any video and skip any cutscene.
This mean this my hack is useless without a patch to the engine of the game, and yes, after 4 days of research I did that too, also, it's possible to see new bugs due my changes in the game engine.
wine UnixShellunixapi.dll.so will appear in the game directoryunixapi.so.dll to ~/.steam/root/compatibilitytools.d/Proton-5.9-GE-6-ST/dist/lib1936183thum folder at Common/MOVIE to anything, because we don't wanna close the game every dungeon preview.Proton Experimental: Steam downloaded some stuff when I tested today. Opening works now! Other cutscenes have the test picture.
GE-Proton9-11: More cutscenes play, but lack audio.
Proton Experimental: Steam downloaded some stuff when I tested today. Opening works now! Other cutscenes have the test picture.
GE-Proton9-11: More cutscenes play, but lack audio.
Got another ~500MB update and did further testing with Proton Experimental. Opening 1 now has the test screen. To my knowledge, this indicates that these are being worked on and will play eventually.
Some of the "Dungeon Details" videos play. When these videos attempt to play, the screen flickers.
Rarely, a video may still fail to play, resulting in a crash. I found it easy to replicate on the world map with the Dungeon Details videos. It also leaves a .dmp in the game folder.
The game was working perfectly on Steam Deck Proton-GE 9-11 to 9-13. Never before, never after. After 9-13 it stopped trying to destroy my ears with the terrible screeching, but the cutscenes or at least the opening cinematic still don't work.
The cutscenes played properly on a recent proton experimental but as of the latest update (verified on 2026-08-12), the cutscenes no longer play.
Hello @daikaiser, how recent is recent? Can you give a rough date from when you know it behaved better? Also, please add PROTON_LOG=1 %command% to the game's launch options, reach a relevant cutscene, and attach the generated $HOME/steam-$APPID.log to this issue report as a file. (Proton logs compress well if needed.)
Hello @daikaiser, how recent is recent? Can you give a rough date from when you know it behaved better? Also, please add
PROTON_LOG=1 %command%to the game's launch options, reach a relevant cutscene, and attach the generated $HOME/steam-$APPID.log to this issue report as a file. (Proton logs compress well if needed.)
Hello @kisak-valve , I can't recall the exact date but I believe it was sometime early last week when the video playback worked with proton experimental. I have attached the log file as requested. Hope it helps!
proton experimentalx4 2026-08ge-proton9-11x2 2024-08proton 5.9-ge-6x1 2020-09PROTON_LOG=1x2 2026-08d3d11.dllx1 2020-09so.dllx1 2020-09unixapi.dllx1 2020-09mf.dllx1 2019-05mfplat.dllx1 2019-05
Compatibility Report
System Information
I confirm:
steam-524580.log
Symptoms
Game only shows black screen on start. Crashes immediately after pressing Enter on the keyboard (possibly will do the same with any other keys).
Reproduction
Start the game.
Misc
This game is pretty much an enhanced version of the original game, Fairy Fencer F (347830), which has a separate Proton issue here https://github.com/ValveSoftware/Proton/issues/1852.
An unconfirmed list of the differences can be found on this discussion.
I also have the previous game, but it's too big for me to spend internet bandwidth to also download & install.
If it's merely to provide a Proton log, I thought it would be wiser to make one for this game instead, as it's a better one to play once the issue is solved (I knew it wouldn't work beforehand).
Anyways, I think the issue is related with all the current playback issues (https://github.com/ValveSoftware/Proton/issues/1464). I can find
mf.dllandmfplat.dllon my Proton log. I'm guessing the game immediately starts with a cutscene, hence the immediate black screen and crash.