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[Bug 1873769] Re: SB16 audio playback freezes emulation in Windows 95 gu
From: |
Vladislav K. Valtchev |
Subject: |
[Bug 1873769] Re: SB16 audio playback freezes emulation in Windows 95 guest |
Date: |
Wed, 06 Jan 2021 15:45:36 -0000 |
Hi Allan,
I've hit EXACTLY the same problem, while writing a SB16 driver.
Reproducing the bug
----------------------
I've tried to QEMU 4 in several scenarios (GTK UI, text mode with the -curses
option,
just serial console with -nographic and with virt-manager which uses Spice). It
works
as expected in all the cases EXCEPT for the GTK UI: in that case, the video
freezes
while playing the sound, exactly as in the video posted by Marko; even QEMU's
menu
doesn't respond while the audio is playing (the bug affects the whole QEMU UI).
Regression
---------------------
I've also tried the same test with QEMU 2.11, on another machine with Ubuntu
18.04 (LTS)
and there the problem simply does *not* exist. QEMU's UI (does QEMU 2.x uses
GTK?),
works GREAT while playing SB16 audio.
Conclusion
----------------
Is there any chance this bug could be fixed easily, or a fix would necessarily
require
a (partial) re-design of the way the GTK UI works? In particular, why on QEMU
2.11 the
problem does not exist?
Thanks in advance,
Vlad
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https://bugs.launchpad.net/bugs/1873769
Title:
SB16 audio playback freezes emulation in Windows 95 guest
Status in QEMU:
New
Bug description:
- QEMU 4.2.93 (v5.0.0-rc3) built from latest git master
20038cd7a8412feeb49c01f6ede89e36c8995472 using MSYS2 on Windows 10 and
launched on same Windows 10
- Launched using "qemu-system-i386.exe -drive format=raw,file=hdd-
2gb.img -soundhw pcspk,sb16 -m 16 -cpu pentium -vga std -cdrom
Windows_95.iso -boot c"
- I have attached video screen capture of the issue
---
I decided to make my first ever QEMU build after encountering the
dsound issues using the latest 4.2.0 binary from
https://qemu.weilnetz.de/w64/. In my 5.0.0-rc3 build the sound
playback is working correctly, however the whole Windows 95 UI freezes
while sound is playing.
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- [Bug 1873769] Re: SB16 audio playback freezes emulation in Windows 95 guest,
Vladislav K. Valtchev <=