#Xfce4 screen resolution switcher how to
#Xfce4 screen resolution switcher movie
#Xfce4 screen resolution switcher driver

To exit fullscreen mode from here, press alt + space to bring up the title bar menu again, then select вЂњLeave FullscreenвЂќ or simply press alt + f11.ДЇor StandaloneHVMs, you should set the screen resolution in the qube to that of the host, (or larger), before setting fullscreen mode in Xfce4.ДЄs an alternative to the Xfce4 method, you can enable fullscreen mode for select VMs by creating the following entry in the /etc/qubes/guid. The user must select this option from the trusted window manager in dom0. This functionality should still be considered safe, since a VM window still canвЂ™t voluntarily enter fullscreen mode. You can always put a window into fullscreen mode in Xfce4 using the trusted window manager by right-clicking on a windowвЂ™s title bar and selecting вЂњFullscreenвЂќ or pressing alt + f11. Those effects are enabled by default in KDE once Compositing gets enabled in KDE (System Settings -> Desktop -> Enable Desktop Effects), which is recommended anyway.Д«y default, they are triggered by Ctrl-F8 and Ctrl-F9 key combinations, but can also be reassigned to other shortcuts. Other examples such mechanisms are the KDE вЂњPresent WindowsвЂќ and вЂњDesktop GridвЂќ effects, which are similar to MacвЂ™s вЂњExposeвЂќ effect, and which can be used to immediately detect potential вЂњGUI forgeryвЂќ, as they cannot be intercepted by any of the VM (as the GUID never passes down the key combinations that got consumed by KDE Window Manager), and so the VM cannot emulate those. The simplest example is the use of Alt+Tab for switching between windows, which is a shortcut handled by dom0. However, it is possible to deal with fullscreen mode in a secure way assuming there are mechanisms that can be used at any time to switch between windows or show the full desktop and that cannot be intercepted by the VM. to trick the user into entering a secret passphrase into a window that looks like belonging to some trusted domain).

like other windows, belonging to other domains (e.g.

#Xfce4 screen resolution switcher movie

to show a movie on a full screen, it might not be possible for the user to know if the applications/VM really вЂњreleasedвЂќ the full screen, or if it has started emulating the whole desktop and is pretending to be the trusted Window Manager, drawing shapes on the screen that look e.g. If one allowed one of the VMs to вЂњownвЂќ the full screen, e.g.

Why is fullscreen mode potentially dangerous? This allows the user to easily realize to which domain a specific window belongs.

After upgrading to ubuntu 20.04, I tested 3 drivers, nvidia-390, 450 and 460.

#Xfce4 screen resolution switcher driver

(lightDM, GTX 970, kernel 5.4.0-64) before os upgrading, opengl and vulkan programs were working without any problems under ubuntu 14.4 and driver 364. Normally, the Qubes GUI virtualization daemon restricts the VM from вЂњowningвЂќ the full screen, ensuring that there are always clearly marked decorations drawn by the trusted Window Manager around each of the VMs window. After upgrading to ubuntu 20.04 and installing nvidia driver, i canвЂ™t log in because of the endless login loop.

#Xfce4 screen resolution switcher how to

How to enter fullscreen mode What is fullscreen mode?