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Created attachment 662291 [details] The sreenshot I captured when the recorder in windows 7 hit the bug. Description of problem: Start Windows 7 32bit guest with a intel-hda device, when during the recording, the record time would reach nearly 20 minutes in a short time(nearly 10s ), and make the record file too big to continue record. Version-Release number of selected component (if applicable): 1.host kernel is 2.6.32-348.el6.x86_64 2.qemu-kvm verison is qemu-kvm-0.12.1.2-2.342.el6.x86_64 3.guest os is Windows 7 32bit sp1 4.The driver version of "High Definition Audio Device " in guest is 6.1.7601.17514 How reproducible: 100% Steps to Reproduce: 1.Run a Windows 7 32bit sp1 guest, with a intel-hda device, e.g. <qemu-cli>... -device intel-hda,id=sound0,bus=pci.0,addr=0x7 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 ... 2.After Windows 7 bootup, open the "Sound Recorder", and start recording Actual results: About more than 10s, the record time reach to be 20 minutes, and since this, make the recording file too big to continue record. Pls see the "screenshot" I attached in this bug. Expected results: Sound Recorder works well in guest. Additional info: I test it in a Windows 7 host, which the driver of "HDA" device is the same as guest, the Sound Recorder works well.
Additional info: 1.The whole cli I use is : #/usr/libexec/qemu-kvm -cpu SandyBridge -m 2G -smp 2,sockets=1,cores=2,threads=1 -M rhel6.4.0 -enable-kvm -name testnic2 -drive file=/mnt/win7-64.raw,if=none,format=raw,werror=stop,rerror=stop,cache=none,media=disk,id=drive-scsi0-disk0 -device virtio-scsi-pci,id=scsi0,addr=0x4 -device scsi-hd,scsi-id=0,lun=0,bus=scsi0.0,drive=drive-scsi0-disk0,id=virtio-disk0,bootindex=1 -nodefaults -nodefconfig -monitor stdio -netdev tap,id=hostnet0,vhost=on,script=/etc/qemu-ifup -device virtio-net-pci,netdev=hostnet0,id=virt-net0,mac=54:52:1a:32:b4:71 -device sga -chardev socket,id=serial0,path=/var/test1,server,nowait -device isa-serial,chardev=serial0 -vnc :10 -vga std -boot menu=on -device intel-hda,id=sound0,bus=pci.0,addr=0x7 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 2.The guest is using vnc .
wont hit this bug with spice instead of vnc
Test this bug with vnc and do the same libvirt does: set QEMU_AUDIO_DRV=none. cli like this #QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm ...-vnc :10 -vga std ... -device intel-hda,id=sound0,bus=pci.0,addr=0x7 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 ... Result: The sound recorder works well, but since this "QEMU_AUDIO_DRV=on" environment, could not hear anything in guest.