Hello Marc, Better repost on qemu-devel. Please post full qemu command line as well. Best regards, Yan. > On 4 Nov 2017, at 11:20, Marc Rechté <marc4@xxxxxxxxx> wrote: > > Hello, > > Not very sure if this is the place to report. > > I am having an issue with an USB Atmel-ICE JTAG probe, using Atmel Studio in a Windows 7 guest (32-bit). The probe is seen OK, I can flash the target device. > > The problem is in a debug session: the program flow is completely erratic (it does not follow the program sequence). > > I did the same test with Virtualbox (same host, 64-bit guest) and I do not have that issue. > > Thanks > > $ uname -a > Linux linux2 4.13.11-1-ARCH #1 SMP PREEMPT Thu Nov 2 10:25:56 CET 2017 x86_64 GNU/Linux > > $ pacman -Q qemu > qemu 2.10.1-1 > > > $ pacman -Q libvirt > libvirt 3.9.0-1