Building a fault-tolerant firewall system with virtual machines: Configuring X to use qxl video driver


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Now we work on the fw-1 virtual machine. First let's try to see with the -vga qxl definition, which video driver qemu will give us in the kernel. You run this command:

sudo lspci -nnk|sed -n '/VGA/,/Kernel modules/p'



Oh so the qxl video driver is available. The remaining is X must handle kernel modesetting. This is done by X qxl driver. But we have to tell it. You configure as below:

sudo tee /etc/X11/xorg.conf.d/10-qxl.conf << EOF
Section "ServerLayout"
    Identifier     "Default Layout"
    Screen      0  "Screen0" 0 0
EndSection

Section "Device"
    Identifier  "Videocard0"
    Driver      "qxl"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device     "Videocard0"
    DefaultDepth     24
    SubSection "Display"
        Viewport   0 0
        Depth     24
        Modes "1360x768"
    EndSubSection
EndSection
EOF

The default video mode is 1360x768. You can replace with other mode as needed in the list of supported video modes.
The following command extracts six lines in the X server's log at while load X qxl video driver:

sed -n '/LoadModule: "qxl"/,+5p' ~/.local/share/xorg/Xorg.0.log

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