Okay, I'm trying to figure out whether this bug report is user-mode or system-mode related. The user is experiencing issues running Qemu on minimal Ubuntu and Debian distributions within an Android environment using Linux Deploy. They've encountered several problems: Windows guests beyond XP aren't booting correctly, fullscreen display issues, CPU performance discrepancies, and KVM not working. First, I'll break down each issue to understand what might be causing them. 1) **Windows 7-10 Guests Crashing with Black Screen**: The user mentions that on Debian 9 and Ubuntu minimal, running Windows guests beyond XP results in a black screen after the boot menu. However, Debian 10 can run Windows 7 without this issue. This could relate to how Qemu is handling virtualization or graphics drivers. Since it's only happening on certain versions, maybe there are kernel or Qemu version differences between the distros. 2) **Fullscreen Display Issue**: On Debian minimal, fullscreen doesn't work, but Ubuntu minimal does. This might be related to how each distribution configures Qemu's graphical output or their respective window managers and display drivers. 3) **CPU Performance Difference**: The default Qemu CPU runs at 1 GHz on Debian and 2 GHz on Ubuntu. This could be due to different Qemu configurations or settings in the minimal setups, perhaps related to CPU throttling or resource allocation within the Android environment. 4) **KVM Not Working**: Virtualization isn't detected by Limbo PC Emulator or the minimal distros, despite running on an ARMv8-A CPU capable of virtualization. This might be a problem with how Linux Deploy is setting up the chroot environment, possibly not passing through necessary permissions or hardware capabilities. Now, considering whether these are user-mode or system-mode issues: - **User-mode** typically involves applications running without special privileges. Issues here could relate to configuration files, application settings, or user-level processes. - **System-mode** involves lower-level components like the kernel, device drivers, hardware access (like KVM), and system services that require higher privileges. Looking at each issue: 1) The black screen might be a graphics driver issue within Qemu. If it's about how Qemu is configured or if certain features are enabled, it could be user-mode. However, since it affects booting beyond XP, maybe there's something deeper with the virtual machine setup or drivers. 2) Fullscreen display issues likely relate to how Qemu interacts with the windowing system on each distro, which might be a configuration issue in user-mode. 3) CPU performance differences could be due to Qemu's configuration settings regarding CPU cores or frequency, possibly a user-mode setting. 4) KVM not working is a clear system-mode issue. KVM requires kernel support and proper virtualization extensions. If the chroot environment isn't correctly passing these through, it's a problem at the system level with how the OS is configured or runs within the Android container. Since one of the main issues (KVM) is definitely a system-mode problem involving hardware virtualization features not being detected, even if other issues might be user-related, the presence of a critical system-level issue makes the overall classification 'system'. I'm leaning towards 'system' because KVM involves kernel modules and hardware virtualization, which are lower-level components. The other points could have mixed causes, but since one is clearly system-mode, that's the determining factor. The issues primarily involve low-level system components such as kernel support for KVM and hardware virtualization, making this a system-mode problem. system