Enable Opera Speed Dials on Address Bar

This used to be activated by default, but not anymore. To re-enable Speed Dial tiles on address bar when you click on it, enable the following;

Tested on Opera version: 123.0.5669.23 on 2025 Nov 05

VirtualBox VT-x is being used by another hypervisor error on Ubuntu 24.04.3

So the error basically looks like this;

VT-x is being used by another hypervisor (VERR_VMX_IN_VMX_ROOT_MODE).

VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: ConsoleWrap
Interface: IConsole {6ac83d89-6ee7-4e33-8ae6-b257b2e81be8}

The solution is to check the running KVM and shutting them down

lsmod | grep kvm
lsof | grep kvm

Then remove them, the usual suspects are

kvm_intel

and

kvm

sudo rmmod kvm_intel
sudo rmmod kvm

Revert a pushed GIT commit

git reset --hard HEAD~
git push -f

git reset --hard HEAD

or

git reset --hard HEAD~1

: What it does

This command forcefully resets your current branch to the commit just before the latest one (HEAD~1), and:

• Moves the HEAD pointer back one commit.
• Updates the index (staging area) to match that previous commit.
• Overwrites your working directory to match that previous commit — meaning any changes in the latest commit and any uncommitted changes are lost.

In short, it erases the last commit and everything in it, as if it never happened.

---

Difference from git revert

Feature	git reset --hard HEAD~1	git revert HEAD
Action	Deletes the last commit	Creates a new commit that undoes the last one
History	Rewrites history (destructive)	Preserves history (non-destructive)
Safety	Risky — can lose data	Safe — doesn't remove any commits
Collaboration	Not recommended on shared branches	Safe for shared branches

• git revert is like saying “Oops, let me undo that” — but it keeps a record of the mistake.
• git reset --hard is like saying “Let’s pretend that never happened” — and it wipes it clean.

---

If you're working solo and want a clean slate, reset --hard is fine. But if you're collaborating, revert is the safer choice.

Want to see an example of each in action?

Ubuntu 24.04.2 - Wifi and NVIDIA drivers do not work on the Kernel version 6.11.0-25-generic

Solution

I wrote about the solution that worked for me after much research on AskUbuntu

Useful links 

Ubunru 24.04.2 6.11.0-19-generic wifi link down 

Might work 

Switch to an old Kernel version that works, and execute the following 

sudo apt install --reinstall linux-generic 

sudo apt install linux-modules-extra-6.11.0-25-generic

Apache2/PHP increase upload file size

Edit the php.ini Use a standard text editor to open

/etc/php/apache2/php.ini

, search for the following variables and change/increase these to (as desired but a general guideline is mentioned):

memory_limit = 512M
upload_max_filesize = 100M
post_max_size = 100M

Some more values to change if you want a better performance of your web server:

max_execution_time = 600
max_input_time = 600
memory_limit = 1024M

Save and close the editor/file and restart the apache web server with:

service apache2 restart

or

systemctl restart apache2

Ubuntu 24.04.1 - libadwaita apps can't detect dark mode - fix

Found solution here on Stackoverflow. Open /etc/environment

sudo nano /etc/environment

Then add the following line to the end of it.

ADW_DEBUG_COLOR_SCHEME=prefer-dark

Save it and source it,

source /etc/environment

Logout and Login. Should libadwaita apps work in dark mode now.

Getting started with developing Grafana Plugins - Without Docker - The easy way

Grafana has its own Tutorial for this but it's complex and intimidating for a beginner. 

Here's my "easy way" of doing this.

Scaffolding

Get Grafana scaffolding for plugin development with,

npx @grafana/create-plugin@latest

It will ask you a couple of questions before it populates the basic stuff you need to start.

First run

Get to the folder it creates with the boilerplate code; and then run,

npm run build

to build your plugin. Then copy and paste the

dist

folder to your plugins folder after renaming it with the following format

{company_name}-{plugin_id}-{plugin_type}

. (On Linux/Ubuntu it is

/var/lib/grafana/plugins

. Find out where it is on yours)

Working with unsigned plugins

This won't show on your Grafana plugins library before you sign it. If you want to test the plugin before signing, you can edit the

grafana.ini

file to enable it for unsigned plugins.

app_mode = development

More details on allowing unsigned plugins can be found here.

Check if it works

Restart Grafana to see your changes

sudo systemctl restart grafana-server

Make sure you sign the plugin before you publish or turn off the development mode.

Tested on Grafana version: Version 11.2.0 locally installed on Ubuntu 22.04.4 without Docker.