From c0cbeb9d8e5a731ba88500fb01690cb92455fc25 Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Tue, 5 May 2026 18:07:13 +0300
Subject: [PATCH 1/2] nixos/virtualisation: explain resolution is only relevant
 to grub

---
 nixos/modules/virtualisation/qemu-vm.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index b58cdd8ac5f7..5f9ef2eedc84 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -552,7 +552,7 @@ in
         y = 768;
       };
       description = ''
-        The resolution of the virtual machine display.
+        The resolution of the virtual machine display (relevant only if virtualised machine uses grub bootloader).
       '';
     };
 

From 44c6c2ef166cc796b417d9885b966489b23a2bf9 Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Tue, 5 May 2026 22:56:15 +0300
Subject: [PATCH 2/2] nixos/virtualisation: remove hard-coded virtio-gpu-pci
 device from aarch machines

In 9e78baf5c75ed87360dfcab4c5eeeee2256be2dc, Aarch machines were added
the `-device virtio-gpu-pci` argument, to mirror `-vga std` option that
was added unconditionally to virtualised x86_64 machines. Since then,
in a7ca287ecb3bd5589d2f815a27f1152071d92b57, the `-vga std` option was
removed, because that is the default value of this option embedded in
QEMU since version 2.2.

Removing it from the hard-coded list of qemu options makes it possible
for the user to choose their own `-vga` value. Similarly, for Aarch
virtualised machines, choosing unconditionally the `-device
virtio-gpu-pci` option instead of e.g `-device virtio-gpu-gl-pci`,
can be bothersome too - see:

https://discourse.nixos.org/t/test-an-aarch64-linux-vm-wayland-compositor-from-an-x86-64-linux-host/77416/2
---
 nixos/modules/virtualisation/qemu-vm.nix | 1 -
 1 file changed, 1 deletion(-)

diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index 5f9ef2eedc84..1d879218a690 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -1380,7 +1380,6 @@ in
         "-device usb-tablet,bus=usb-bus.0"
       ])
       (mkIf pkgs.stdenv.hostPlatform.isAarch [
-        "-device virtio-gpu-pci"
         "-device usb-ehci,id=usb0"
         "-device usb-kbd"
         "-device usb-tablet"