monitor

Windows 10 and 11: How to change “Active signal resolution” to match “Desktop resolution”

 in Windows  tagged monitor / resolution / screen / windows by

Right-click on the desktop and select “Display Settings”.

Scroll down and click on “Advanced display settings”.

In the new window, click “Display adapter properties for Display X”
(where X is the number of the display you are managing).

In the pop-up window, click the “List All Modes” button.

From the new box, scroll until you find the correct resolution and refresh rate configuration, select it, and then click the “OK” button.

You will be sent back to the first pop-up window; click “Apply” or “OK” in that window, and your settings will be applied.

Send ALT+CTRL+Delete to QEMU virtual machine 1

 in GNU/Linux / Virtualization  tagged alt+ctrl+del / monitor / qemu / sendkey / terminal by

Recently we wanted to start a Windows virtual machine from a physical hard disk using a Fedora w/ GNOME 3 host machine to change the domain password of a user.
To do so, we used QEMU, QEMU is a generic and open source machine emulator and virtualizer.

To perform the password change, we needed to sent the ALT+CTRL+Delete key combination to the virtual machine to access the system screen and then change the user password.
Pressing ALT+CTRL+Delete on the Fedora/GNOME 3 host machine, it popped up a prompt to shut down the host machine instead of sending the key combination to the active window of the VM. Apparently, we could not sent the key combination directly to the VM and had to find a way around it.

Solution:

We pressed ALT+CTRL+2 while the QEMU window was selected/active to switch to the QEMU terminal/monitor.
In the blank screen that appeared, we typed sendkey alt-ctrl-delete and pressed the Enter key.
This action sent to the virtual machine OS the key combination ALT+CTRL+Delete.
Finally, to switch back  to the guest screen we pressed ALT+CTRL+1.