that's an interesting observation. Thank you for finding this one. It'd be much faster to find one of about 10 debian patches which affects this but full qemu bisect works too, ofcourse.
Simon, I can't reach you by email, your mailserver apparently malfunctioning, - I sent you instructions about how and what to do, but all my emails returned back - connections to your mailserver times out from a few of networks I have access to. This commit breaking macos guest is interesting, perhaps we should try to fix that for 5.1.. :) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1886318 Title: Qemu after v5.0.0 breaks macos guests Status in QEMU: New Bug description: The Debian Sid 5.0-6 qemu-kvm package can no longer get further than the Clover bootloader whereas 5.0-6 and earlier worked fine. So I built qemu master from github and it has the same problem, whereas git tag v5.0.0 (or 4.2.1) does not, so something between v5.0.0 release and the last few days has caused the problem. Here's my qemu script, pretty standard macOS-Simple-KVM setup on a Xeon host: qemu-system-x86_64 \ -enable-kvm \ -m 4G \ -machine q35,accel=kvm \ -smp 4,sockets=1,cores=2,threads=2 \ -cpu Penryn,vendor=GenuineIntel,kvm=on,+sse3,+sse4.2,+aes,+xsave,+avx,+xsaveopt,+xsavec,+xgetbv1,+avx2,+bmi2,+smep,+bmi1,+fma,+movbe,+invtsc \ -device isa-applesmc,osk="ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc" \ -smbios type=2 \ -drive if=pflash,format=raw,readonly,file="/tmp/OVMF_CODE.fd" \ -drive if=pflash,format=raw,file="/tmp/macos_catalina_VARS.fd" \ -vga qxl \ -device ich9-ahci,id=sata \ -drive id=ESP,if=none,format=raw,file=/tmp/ESP.img \ -device ide-hd,bus=sata.2,drive=ESP \ -drive id=InstallMedia,format=raw,if=none,file=/tmp/BaseSystem.img \ -device ide-hd,bus=sata.3,drive=InstallMedia \ -drive id=SystemDisk,if=none,format=raw,file=/tmp/macos_catalina.img \ -device ide-hd,bus=sata.4,drive=SystemDisk \ -usb -device usb-kbd -device usb-mouse Perhaps something has changed in Penryn support recently, as that's required for macos? See also https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=964247 Also on a related note, kernel 5.6/5.7 (on Debian) hard crashes the host when I try GPU passthrough on macos, whereas Ubuntu20/Win10 work fine - as does 5.5 kernel. See also https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961676 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1886318/+subscriptions
