user140011: I am trying to run bitcoin core on a raspberry pi. Through vnc viewer.  When I try to run bitcoin-qt I get
Qt.qpa.xcb: xkeyboard extension not present on the x server
X11 connection broke error 4, did x11 server die?
I'm pretty new at all this, any advice to move forward?

user13866: I don't have a solution to offer but maybe the following will help you move forward?

any advice to move forward?

Assuming the Pi is running Raspbian with X11 installed, I would try ...

Connect a screen to the Pi using the HDMI connector, connect a USB keyboard and see if the program runs OK locally on the Pi.
Install an X11 server (the nomenclature may seem backwards here) on a Windows PC (or Mac etc) such as Xming and see if it runs xclock ok then see if it runs bitcoin-qt
Check that VNC can run other X11 apps OK (e.g. xclock etc). Publish details of the VNC/network etc configuration here (or maybe in superuser.com) to get better advice.


user138867: From: https://answers.ros.org/question/350143/ros-via-vnc-xkeyboard-extension-not-present/

I got through this issue by lots of googling. I use this set of
instructions: https://www.digitalocean.com/communit... but instead of
installing:
sudo apt install tightvncserver
I used
sudo apt-get install tigervnc-standalone-server Which solves the
immediate problem. I can run ROS, various qt utilities, and turtlesim
pretty well. However, getting rviz and gazebo running breaks. I dont
know if it's simply matter of performance of the particular node I
have on digital ocean or something more fundamental with the
configuration.


140011: <p>I am trying to run bitcoin core on a raspberry pi. Through vnc viewer.  When I try to run bitcoin-qt I get</p>
<p>Qt.qpa.xcb: xkeyboard extension not present on the x server
X11 connection broke error 4, did x11 server die?</p>
<p>I'm pretty new at all this, any advice to move forward?</p>
 13866: <p>I don't have a solution to offer but maybe the following will help you move forward?</p>
<blockquote>
<p>any advice to move forward?</p>
</blockquote>
<p>Assuming the Pi is running Raspbian with X11 installed, I would try ...</p>
<ul>
<li>Connect a screen to the Pi using the HDMI connector, connect a USB keyboard and see if the program runs OK locally on the Pi.</li>
<li>Install an X11 server (the nomenclature may seem backwards here) on a Windows PC (or Mac etc) such as Xming and see if it runs xclock ok then see if it runs bitcoin-qt</li>
<li>Check that VNC can run other X11 apps OK (e.g. xclock etc). Publish details of the VNC/network etc configuration here (or maybe in superuser.com) to get better advice.</li>
</ul>
 138867: <p>From: <a href="https://answers.ros.org/question/350143/ros-via-vnc-xkeyboard-extension-not-present/" rel="nofollow noreferrer">https://answers.ros.org/question/350143/ros-via-vnc-xkeyboard-extension-not-present/</a></p>
<blockquote>
<p>I got through this issue by lots of googling. I use this set of
instructions: <a href="https://www.digitalocean.com/communit.." rel="nofollow noreferrer">https://www.digitalocean.com/communit..</a>. but <strong>instead of</strong>
installing:
sudo apt install tightvncserver</p>
<p>I used</p>
<p><code>sudo apt-get install tigervnc-standalone-server</code> Which solves the
immediate problem. I can run ROS, various qt utilities, and turtlesim
pretty well. However, getting rviz and gazebo running breaks. I dont
know if it's simply matter of performance of the particular node I
have on digital ocean or something more fundamental with the
configuration.</p>
</blockquote>
