If you try to compile from the source the problem does not occur (see test below)
Thanks. ---- # get new version mkdir /tmp/test cd /tmp/test wget https://download.qemu.org/qemu-2.11.0.tar.xz # extract tar xaf qemu-2.11.0.tar.xz # enter directory cd qemu-2.11.0 # fix compilation # comment this lines (237, 238, 293) // IOCTL(SNDCTL_DSP_MAPINBUF, IOC_R, MK_PTR(MK_STRUCT(STRUCT_buffmem_desc))) // IOCTL(SNDCTL_DSP_MAPOUTBUF, IOC_R, MK_PTR(MK_STRUCT(STRUCT_buffmem_desc))) // IOCTL(SOUND_MIXER_ACCESS, 0, TYPE_PTRVOID) sed -i "/SNDCTL_DSP_MAPINBUF/d;/SNDCTL_DSP_MAPOUTBUF/d;/SOUND_MIXER_ACCESS/d" ./linux-user/ioctls.h ./configure --prefix=/opt/qemutest --target-list=x86_64-softmmu --enable-system --enable-lzo --enable-libssh2 --enable-glusterfs --enable-opengl --enable-xfsctl --enable-usb-redir --enable-libusb --enable-kvm --enable-gtk --enable-sdl --enable-gcrypt --enable-gnutls # install required devel packages # when ok... compile make -j8 # test version ./x86_64-softmmu/qemu-system-x86_64 --version # test ./x86_64-softmmu/qemu-system-x86_64 -k it -machine accel=kvm -m 4096 -no-fd-bootchk -drive file="vmserver.img",if=scsi -boot once=c,menu=off -net nic,vlan=0,macaddr=00:1a:21:a8:13:10 -net user,vlan=0,hostname=TESTSERVER -rtc base=localtime -name "vmserver" -usbdevice tablet -smp 8 -vga virtio # all right..... no artefacts!!!
