Glitch When Loading Rom on Second Multiplayer Window

[ackamp]

So I have a Rom for Pokemon Emerald and I wanted to trade with another save file I created on a copy of that ROM so I could have all three starters. I had everything ready on either account but whenever I wanted to load the copy of the ROM in the second multiplayer window, the ROM a) wouldn't load b) a white screen would show up.

[bsngardner]

I can confirm this bug. I am running the development version, but I downgraded to the newest release and it has the same problem. I tried changing video settings (opengl to software).

[endrift]

White screen is a sync issue. Try switching the audio driver or changing sync settings.

Fwiw, this is going to get heavily rewritten at some point.

[Numero256]

Sync settings or drivers dont change anything. It will just get very laggy.

Regarding this issue, I can confirm I have the same issue in 0.7.0 (Arch Linux). I managed to get pokemon "working" the following way:

First, I mute the audio and turn off Sync to Audio, then turn on Sync to Video instead. I also turn off Frame skip. Then I load my pokemon ROM. Once load, I leave the intro running and I don't press any buttons in the pad. Instead, I open the multiplayer window, and load the other ROM. The game freezes at a white screen.

Then I disable Sync with video, and leave the intro loop. When it loops, the game syncs with the other window and both games are now working. I enable Sync with video again, and then proceed to play using a gamepad in one window, and the keyboard with the other.

However, there is a big issue with the FPS lock. I just noticed that while one window tries to keep it up at 60FPS, the other goes above 63FPS during trading. And that's when the desync happens and I get link errors in game. It's very unstable. Also the FPS target won't work when Sync to video is enabled, it will attempt to lock at 60FPS no matter what. Not sure if this is an intended feature.

I also tried to link with Sync to audio enabled and FPS locked to 45FPS, and upon entering the room, I got a communication error, so it's no good either. Also I got a speed up of 47FPS in one of the windows.

I also tried changing the audio engine to Qt, same results. Tried to lock at 59.7 (native) FPS. Got a speed up of 63FPS. Communication error when starting a duel. It sometimes let me do a trade or two, or even battle for a while, but it will eventually desync and show me a communication error. I also tried to switch to OpenGL version 1.1 (forced), nothing. Same results. And if I switch to Software (Qt), I get an error right when I attempt to enter the room. And don't even try to Sync to video while in software mode, the game soft locks.

[chopfitzroy]

Getting this issue also, any updates?

Cheers.

[DataFlame]

Can confirm.

On Linux Mint 19 Tara, mGBA 0.6.1.

[seokgicom]

you may try this
1.Open a multiplayer window and just load both of the roms you wanna play. (If you've loaded the rom and were playing it already, reset it so the emulator can play the intro)
2.After loading, intro of the first window will play. (second window will show white screen for now)
Then uncheck [sync to audio] (uncheck [sync to video] also if it's checked) in the emulation tab
2. wait for a while for the game on the second window to operate
*make sure the emulator is not paused (it's in the emulation tab)
3. check [sync to audio] again

[basil-conto]

With a build of latest master (0.8 5436 0c9802e) on Debian Testing, trying to link Pokemon Gold/Silver does not result in any white screens, but I get similar hangs, speedups, and communication errors as described above, also when toggling sync settings.

i'm just curious as to what the status of this issue is and whether there is anything I can do to help debug it or figure out what's happening (with assistance/instruction, of course).

Either way, I'd like to take this opportunity to thank everyone working to provide this very fun project.

[rtandy]

This seems to be fixed (or at least working well enough) since a9e96c7, tried GB/GBC and GBA games and all good so far. Qt frontend on Debian 10 (Buster).

[mathturtle]

So do you have any idea when a9e96c7 will be included as part of a release? I was hoping it would be part of the next version, but checking the one released last month it is not included in 0.7.3 and I still see the issue in that release. I'd rather not build master from source just to play a game...