Crashes on Android after app is resumed if running in multi-threaded mode

[bdach]

As reported in https://github.com/ppy/osu/discussions/16512 Follow-up to #4200

Looks like the context preservation added with https://github.com/ppy/osuTK/pull/74 only works on some devices because android gonna android (which I half-expected because the android documentation seemed to indicate that this may be the case), so it looks like in the worst case scenario there is still a need for the game to be fully cycled to continue working after resume.

[bdach]

So seeing that this looks to be pretty much the number 1 issue per user/event count on sentry I went back to this one today to try and see if I can fix, but I'm having two problems:

• First and foremost, despite having an idea of how to fix it, I can actually not reproduce the context loss on any of my test devices despite numerous attempts. Apparently the loss is most common when the device goes to sleep, but it's just... not happening here. I even tried adb commands to force sleep to no avail.
• To know when the GL context is disposed, I'll want to hook onto GLSurfaceView.Renderer.onSurfaceCreated(), which means I'll need to make osuTK changes - but I won't be able to use them because osuTK is hard-stuck on android after changes to compile it for net6 (https://github.com/ppy/osuTK/pull/75). So the fix ends up hard-depending on @huoyaoyuan's android on net6 series.

[ppy-sentryintegration[bot]]

Sentry issue: OSU-1E

[ppy-sentryintegration[bot]]

Sentry issue: OSU-4

[bdach]

Upon further investigation reproduction requires multithreaded execution. May not be the context being lost after all, rather than it being accessed before the game is allowed to do so.

[bdach]

Looked into this some more today but I don't have much to show for it. I am locally seeing 2 disparate errors: a BAD_ACCESS one and a BAD_SURFACE one.

The BAD_ACCESS one seems to be caused by multiple threads trying to make the gl context current. Removing this MakeCurrent() call on the osutk side appears to fix it.

I don't know what causes the BAD_SURFACE one and I don't know how to fix it. Documentation is scarce to say the least, and I don't know most of osutk code. If suppressing the errors is considered urgent, then all I can do in the short term is to go back to killing the app if it is exited in multithreaded mode.

[peppy]

That MakeCurrent() call definitely looks suspicious (and likely unnecessary).

Does changing that alone make crashing less likely?

[bdach]

No, it only changes error 1 to error 2. It's still a 100% crash either way.

Going to poke some more but my hopes are low.

[smoogipoo]

As an aside, is there any way we can use SDL for Android?

[bdach]

Had that thought too, then saw these two pages:

https://wiki.libsdl.org/Android https://github.com/libsdl-org/SDL/blob/main/docs/README-android.md

and slowly backed away. A lot of eldritch incantations and corralling jni and what have you. I have zero clue about any of it.

[bdach]

Tentatively closing since the two pulls link above in conjunction fix all failures I could reproduce locally, so hopefully this is gone next release. If it's not, I'll reopen.

[bdach]

This came up again (https://github.com/ppy/osu/issues/20972) - reopening.

[SoffiMeower]

Ah, no wonder I didn't see this. It was closed.

[SoffiMeower]

A paste of my issue for this:

Type

Crash to desktop

Bug description

Sometimes, I like to have osu! play in the background so I can listen to music using all the beatmaps I have downloaded! However, I've noticed that sometimes, when I manually lock my phone, or my phone autolocks, I'll hear a quick noise from the game before it seems to have closed when I unlock my phone. (Sounds like the Bomb/Fatal Error sound?) Requiring me to reopen the game.

Screenshots or videos

No response

Version

2022.1022.0-lazer

Logs

runtime.log performance.log network.log database.log

[thebashforkbomber]

This still happens on 2025.817.0-lazer. I've analyzed runtime.log and found that GameplayClockContainer is stopped and never restarted when this glitch occurs. Log files

[peppy]

This still happens on 2025.817.0-lazer. I've analyzed runtime.log and found that GameplayClockContainer is stopped and never restarted when this glitch occurs. Log files

You are referring to https://github.com/ppy/osu/issues/34732, which has been resolved in tachyon and will be hotfixed in lazer soon.