Fixes on CNELECAR

Dell P2424HT No Sound from Built-in Speaker? Here's the Fix

Tue, 16 Jun 2026 15:53:57 +0800

Your Dell P2424HT has a 3W built-in speaker that works over HDMI, DP, and USB-C — but it's disabled by default. Here's how to enable it in the OSD menu in under 10 seconds.

How to Solve the Error Public Key Retrieval Is Not Allowed on DBeaver

Tue, 03 Feb 2026 08:21:17 +0000

The error “Public Key Retrieval is not allowed” happens because MySQL 8+ uses caching_sha2_password as the default authentication plugin.

When a client (like DBeaver) connects remotely, MySQL tries to use RSA public key encryption to secure the password. If the client does not allow retrieving the server’s public key, the connection fails with this error.

Solution

To fix this, you can set allowPublicKeyRetrieval=true in DBeaver’s Driver Properties.

Steps:

Right click on the database connection that you want to connect to.
Select Edit Connection from the menu.
Switch to the tab Driver properties.
Modify the allowPublicKeyRetrieval parameter to TRUE.
Click OK to save the changes.

Now you can connect to your database without the error.

Set proxies to solve : Failed to connect to github.com port 443 after XXXXX ms: Timed out

Wed, 04 Jun 2025 12:17:32 +0000

Recently we’ve encountered this issue many times while pushing updates to GitHub: " Failed to connect to github.com port 443 after XXXXX ms: Timed out." In this post, we’ll show you how we solved it.

Apparently, this is a network issue between local machine and GitHub, we could set proxies for Git to fix it.

Run follwing commands in the Terminal/Shell:

git config --global http.proxy socks5://192.168.7.10:7891
git config --global https.proxy socks5://192.168.7.10:7891

The above two lines of commands set up Git’s global http and https proxies, using the socks5 protocol. In actual operation, just change the proxy server information to your own.

How to turn off the integrated graphics card on a Dell rack workstation?

Sat, 08 Feb 2025 05:59:13 +0000

Dell rack workstations are configured with a VGA integrated graphics interface by default. If you have installed a discrete graphics card and want to disable the integrated graphics card, you can follow the steps.

Stop Your Dell Laptop from Powering On When You Open the Lid – Here’s How!

Fri, 07 Feb 2025 04:28:35 +0000

Many Dell laptops come with a default setting that automatically powers on the device when the lid is opened. If you’d prefer to manually control when your laptop turns on, here’s how to disable this feature.

Fixing freezing or black screen when remote controlled PC monitor is turned off

Fri, 13 Dec 2024 07:27:14 +0000

Do you work remotely using a remote control application like Teamviewer? Have you ever encountered the situation that, when the monitor of remote PC is on, the remote control works fine, but if you turn off the monitor, the picture from remote PC freezes or turns out a black screen?

We have seen a lot of cases online, such as:

To be honest, such an experience really causes bad feelings. We don’t want to keep the monitor on, on the one hand, to save power, and on the other hand, to protect our privacy from others.