The log shows the "unknown" VGA monitor is connected to the modeset
driver, so that's the xorg-server package...
[31.457] (II) modeset(G0): EDID for output VGA-1-1
[31.457] (II) modeset(G0): Printing probed modes for output VGA-1-1
[31.457] (II) modeset(G0): Modeline "1024x768"x60.0 65.00 1024 1048 1184
1344 768 771 777 806 -hsync -vsync (48.4 kHz e)
[31.457] (II) modeset(G0): Modeline "800x600"x60.3 40.00 800 840 968
1056 600 601 605 628 +hsync +vsync (37.9 kHz e)
[31.457] (II) modeset(G0): Modeline "800x600"x56.2 36.00 800 824 896
1024 600 601 603 625 +hsync +vsync (35.2 kHz e)
[31.457] (II) modeset(G0): Modeline "848x480"x60.0 33.75 848 864 976
1088 480 486 494 517 +hsync +vsync (31.0 kHz e)
[31.457] (II) modeset(G0): Modeline "640x480"x59.9 25.18 640 656 752 800
480 490 492 525 -hsync -vsync (31.5 kHz e)
** Package changed: nvidia-graphics-drivers-440 (Ubuntu) => xorg-server
(Ubuntu)
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https://bugs.launchpad.net/bugs/1742089
Title:
Third unkown screen
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