protonscr

Little Witch Nobeta

protonopen appid 1049890Game compatibility - Unofficial
ValveSoftware/Proton#5486 · opened 2022-01-07 by the8472 · updated 2022-10-19 · 8 comments · github · game page · search this game
Tthe8472 2022-01-07 github

Compatibility Report

  • Name of the game with compatibility issues: Little Witch Nobeta
  • Steam AppID of the game: 1049890

System Information

I confirm:

  • [X] that I haven't found an existing compatibility report for this game.
  • [X] that I have checked whether there are updates for my system available.

Proton Log: steam-1049890.txt

Symptoms

When starting the game via Steam Play it reaches the main menu but occupies all CPU cores, spending most of its cpu-time in kernel mode.
This doesn't happen when starting the game with wine 7.0-rc4 from the command line, but then sound doesn't work.

nobeta CPU load

Reproduction

The issue happens immediately when reaching the main menu. Lowering the graphics settings doesn't appear to make a difference.

Kkisak-valve maintainer 2022-01-07 github

Hello @the8472, it might be interesting to test if something like taskset -c 0-31 %command% in the game's launch options has a significant effect.

Tthe8472 2022-01-07 github

That leads to fewer cores being used, but those that are still spend near 100% in kernel mode. I also tried 0-7, similar result.

Tthe8472 2022-01-08 github

Here's a CPU flamegraph of the game process under steam play:

nobeta flamegraph

and here under wine staging:

nobeta flamegraph wine

Kkisak-valve maintainer 2022-01-08 github

That reads like an issue with esync. You could give PROTON_NO_ESYNC=1 %command% a try to see if it gives you similar behavior to vanilla wine. Alternatively, it might be more interesting to see how the game behaves with fsync enabled (needs Linux 5.16+ kernel or an earlier kernel if it has futex_wait_multiple or futex_waitv patched in).

Tthe8472 2022-01-08 github

PROTON_NO_ESYNC=1 brings the CPU load down to reasonable levels. 👍

Tthe8472 2022-01-13 github

I installed a system update which bumps the kernel to 5.16.0-arch1-1. With that the observations change as follows:

5.15 5.16
wine staging ✔️ low cpu load ✔️ low cpu load
proton experimental default settings ❌ >80%, all cores ❌ >80%, all cores
proton experimental PROTON_NO_ESYNC=1 ✔️ low cpu load ⚠️ >20%, all cores
proton experimental PROTON_NO_FSYNC=1 PROTON_NO_ESYNC=1 not tested ✔️ low cpu load
Tthe8472 2022-09-28 github

Additionally the game has an issue acquiring the correct resolution when using the sway window manager. I was able to solve that issue by running it under the gamescope compositor.

PROTON_NO_FSYNC=1 PROTON_NO_ESYNC=1 gamescope -e -w 2560 -h 1440 -f -- %command%

Hhasezoey 2022-10-19 github

I have recently completed the game and encountered some issues:

  • When having VSync enabled or the fps locked, the fps can suddenly drop sometimes from ~100fps to ~20fps
  • 4* out of the 13* videos work, the others just have a static debug image from mfplat
  • sometimes using End Game (exit game button) can lock-up the game and not actually exit it (KDE also says not responding anymore)

Proton Log of playing one of the working videos and one of the ones that dont work

*videos are counted as the videos listed in Video section plus the Credits scene, video file is called Staff.mp4 (to access the videos ingame, you need to complete some in-game challenges)

Information about the videos:
From what i can tell, the videos that work and those that dont, have the same container and same codecs, most of them are also of a similar length and colorspace and bitrate also seem to be the same

ffprobe output of videos

Video Comic_Funny_01_jp.mp4 (working):

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Comic_Funny_01_jp.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2022-08-17T07:45:54.000000Z
  Duration: 00:00:39.36, start: 0.000000, bitrate: 5679 kb/s
  Stream #0:0[0x1](eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 5359 kb/s, 30 fps, 30 tbr, 30k tbn (default)
    Metadata:
      creation_time   : 2022-08-17T07:45:54.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2022-08-17T07:45:54.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]

Video Comic_Funny_04_jp.mp4 (not working):

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Comic_Funny_04_jp.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2022-08-17T07:46:13.000000Z
  Duration: 00:00:28.74, start: 0.000000, bitrate: 5654 kb/s
  Stream #0:0[0x1](eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 5301 kb/s, 30 fps, 30 tbr, 30k tbn (default)
    Metadata:
      creation_time   : 2022-08-17T07:46:13.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2022-08-17T07:46:13.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]

PS: i know the video files themself work, because i have watched them in vlc / mpv
video files are found in /SteamLibrary/steamapps/common/Little Witch Nobeta/LittleWitchNobeta_Data/StreamingAssets/Video/

Proton versions

Launch options

Launch lines