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Procyon Offline OP
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Out of habit, I always perform a make clean before building, just to be safe. I've been burned by that a number of times. I'll give the installers a shot as soon as I'm able.

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@Dullaron: Just tried the mame_0.235+dfsg.1-0ubuntu1~ppa1~hirsute1_amd64.deb installer (along with mame_data). Same problem.

@R. Belmont: Recompiled (cleanly) on both laptops from commit fc79b73. Same problem.

Happy to try more suggestions.

Last edited by Procyon; 09/05/21 06:03 AM.
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I popped an issue in for this in github: https://github.com/mamedev/mame/issues/8538

Edit: The issue was leaving bgfx_backend set to auto. The problem disappeared when I set it to opengl. Thanks.

Last edited by Procyon; 09/05/21 03:20 PM.
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Yeah don't leave it on auto. Glad you got it working again. I have it on opengl here.


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Auto not working is still an issue, I assume it's picking Vulkan in that situation since those are the only two backends that work on Linux.

Do we know if there are issues on non-Linux with Vulkan so we can get it somewhere in an environment JD has a chance to repro?

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The trouble is it works with Vulkan for most people on Linux. It only seems to be problematic with certain cards/drivers. The issues with AMD cards with Vulkan on Linux were solved already (post 0.135). Given that it’s so hardware- and driver-specific, I very much doubt any Windows setup is going to provide equivalent results.

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Might want to put a note about this issue on the MAME website for the Linux users. If there any more issues please put a note about those too. This way people won't be going around in a circle trying to get something to work. No I'm not mad. smile


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So I just double checked if Vulkan could run on my system. I just produced this image using the vkcube utility (run through mangohud): https://imgur.com/a/MZ5jVBr So I can rule out that my system is incompatible with vulkan. Yet if I intentionally set the bgfx_backend to vulkan, the crash reproduces.

Last edited by Procyon; 09/05/21 11:57 PM.
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Just rebuilt to MAME 0.234 to test it out. Set video to bgfx and bgfx_backend to vulkan. MAME launches and runs (mangohud confirms vulkan in use) but then the video freezes after a few seconds. Emulation continues however. I can run pacman and insert coins and press start and I hear the coin sound and the start music. There are just no video updates. Double checked to confirm: no such issues with the opengl backend, the video continues normally.

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