Black Screen with cursor blinking when started Ubuntu on VirtualBox

Ubuntu on my Virtual Machine was running fine when I restarted then suddenly it starts showing a black screen. I googled and tried multiple solutions like:

  1. by disabling the “Enable 3D acceleration” on virtualBox settings
  2. Enabling the “Intel Virtualization Technology” from BIOS

Please note, when I used backup Ubuntu, it works fine. My host system is Ubuntu 18.04.3 LTS. VirtualBox Version 6.0.12, Ubuntu guest OS in VirtualBox is 18.04.2.

I will appreciate if you can help to address the issue

Force specific cursor for an application

I’m currently using termite (a VTE based terminal emulator) on my desktop. Because of my monitor being rather large I switched to using a high visibility red cursor.

But as soon as I open up a terminal, the displayed cursor switches to a text selection cursor.

On the one hand, this totally makes sense, on the other hand, I never select text using the cursor, so the other cursor just makes it harder for me to read the text.

Reading through the emulators doc, there is no option to change the displayed cursor. Is there a xorg / gtk way (whichever is responsible for drawing the mouse cursor) for forcing a specific cursor for an application?

Or should I look into using a different emulator which has this option builtin?

Thanks for the help in advance.

Upgrade to Ubuntu 19.04 on HP Elitebook 840 G1 results in blinking cursor after bootloader

I used to dual boot Windows (on dev/sda1) and Ubuntu 18.04, on my HP Elitebook 840 G1 (SSD). I also have a third partition for most of my files (I believe on dev/sda2 named D:/).

I tried upgrading to 18.10, which worked, after which I wanted to upgrade to 19.04. GRUB still finds the boot options I want, but when I try to boot into Ubuntu, I get a blinking cursor (after the ubuntu logo). Also going into “advanced options” in GRUB and selection 4.15.0-55-generic gives me the blinking cursor (after the ubuntu logo).

I wanted to know if anyone had managed to solve this? I have tried:

  • booting from a stick with Ubuntu 19.04 (most of the times it doesn’t even boot into the stick, and when it does, I also get a flashing underscores)
  • boot into recovery mode and change the GPU settings as proposed by heynnema (gdm3 display manager hangs after booting with Ubuntu 18.10)

The fact that even booting from stick gives an error maybe indicates that it indeed is a graphic error?

How to navigate the terminal with the cursor keys

I’ve done an internet search for ubuntu terminal navigation keys but it didn’t return anything helpful to me. In Windows (command prompt or GUI), you can go to the next or previous word by pressing Ctrlright or Ctrlleft respectively, but these keys don’t work in the Ubuntu terminal.

The only navigation keys I know that work are Home and End. What are the navigation keys to quickly jump between words in Ubuntu’s terminal?

¿Como mover el cursor dentro de las coordenadas de un panel?

Tengo un problema con un codigo para hacer que mi mouse se mueva dentro de un panel de 640×480, lo que pasa es esto tengo un codigo sobre como mover el cursor con coordenadas que extrae de dos archivos de texto. Al precionar el botton este mueve el mouse pero lo que pasa es que lo mueve por encima del panel en donde tengo contemplado el movimiento, eh leído que hay una forma de usar algo llamado PointToClient y el PointToScreen pero no obtuve resultados. Dejo coordenadas para probar:

Coord X:

357                                  336 338 343 357 263 257 246 276 

Coord Y

124 133 131 127 107 76 -88 -90 -105 

Les dejo el codigo:

public void cursor_track_Click(object sender, EventArgs e)         {            List<string> linesX = File.ReadLines(@"C:\EyeMatris\Coordenadas\CoordenadasX.txt").ToList();            List<string> linesY = File.ReadLines(@"C:\EyeMatris\Coordenadas\CoordenadasY.txt").ToList();             List<Point> points = new List<Point>();             for(int i = 0; i< linesX.Count; i++)             {                 Point p = new Point(int.Parse(linesX[i]), int.Parse(linesY[i]));                 points.Add(p);             }             foreach (var point in points) {                 //resolution es mi panel de 640x480                 resolution.PointToScreen(Cursor.Position = new Point(point.X, point.Y));              }         } 

Upgraded 18.04 -> 19.04 – Blinking cursor, KDE 5 not starting

I have been researching and trying to fix this problem for days now, nothing seems to help.

What I did

  • Few days ago I installed KDE Plasma 5 (5.12 or lower, don’t remember exactly)
  • After that I upgraded to Ubuntu 19.04 (and also to KDE Plasma 5.15)
  • When booting to Linux, it shows Kubuntu logo for some time and then gets stuck on blinking cursor ( _ )
  • I used Ctrl + Alt + F2 to go to the tty thing where you can run commands
  • startX started finally after some research but it crashed as soon as the password dialog popped up also, I don’t want Gnome, I want my KDE
  • kstart5 plasmashell should start the KDE Plasma desktop environment but instead I get these errors:
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.   This application failed to start because no Qt platform plugin could be      initialized. Reinstalling the application may fix this problem.  Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.  Aborted (core dumped) 

I uninstalled my AMD drivers because these were meant for Ubuntu 18.04 only but later I found patch to make the Ubuntu 18.04 drivers work on Ubuntu 19.04, but that didn’t change the situation, still KDE won’t start.

I also installed the latest MESA drivers.


Windows 10 & Ubuntu 19.04
2x Xeon E5620 (no overclock)
AMD XFX RX 480 (no overclock)
16 GB Ram
2x 1920×1080 display, connected via DisplayPort and DVI