Fix Brightness Control Not Working for Ubuntu
Run the command below in terminal to know what video card.
ls /sys/class/backlight/
Open a terminal and create the following configuration file:
sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf
Now we need to edit this file. You can use any editor be it a terminal one or graphical.
sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf
Add the following lines to this file:
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
Save it. Restart the system and
Reset your password on Ubuntu
When you’re ready to reset your password on Ubuntu, continue below.
Quickly press and hold the Shift key, which will bring up the GNU GRUB menu. (If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.)
First power on your Ubuntu machine. At the boot menu, you’ll have few seconds to choose the Ubuntu OS to boot into. When prompted, choose *Advanced options for Ubuntu
advanced options for ubuntu
Next, select Ubuntu, with the latest kernel version (recovery mode) to boot into. The recovery mode is used to recover your system on Ubuntu and perform other tasks like resetting your password and updating your system if you can’t boot into it.
advanced options for ubuntu boot menu
Then select the root option to drop into the root shell prompt. In this shell, you have read-only access. In order to run administrative commands, you must remount the shell with read and write permission.
advanced ubuntu boot menu
Next, remount the shell with read and write option. To do that, run the commands below.
mount -rw -o remount /
After running the above commands, the shell should be remounted with read/write permission. Now you can run limited sets of commends, including password change commands as the root user.
To change or reset your forgotten password, run the commands below.
sudo passwd username
Replace username with your account name or user name for the machine. If you have to root account enabled, you should replace username with root to change the root password.
When you run the above commands, you’ll be prompted to create and confirm a password for the account name you mentioned. create it and you’re done.
When you’re done, type reboot to restart your machine.
Quickly press and hold the Shift key, which will bring up the GNU GRUB menu. (If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.)
First power on your Ubuntu machine. At the boot menu, you’ll have few seconds to choose the Ubuntu OS to boot into. When prompted, choose *Advanced options for Ubuntu
advanced options for ubuntu
Next, select Ubuntu, with the latest kernel version (recovery mode) to boot into. The recovery mode is used to recover your system on Ubuntu and perform other tasks like resetting your password and updating your system if you can’t boot into it.
advanced options for ubuntu boot menu
Then select the root option to drop into the root shell prompt. In this shell, you have read-only access. In order to run administrative commands, you must remount the shell with read and write permission.
advanced ubuntu boot menu
Next, remount the shell with read and write option. To do that, run the commands below.
mount -rw -o remount /
After running the above commands, the shell should be remounted with read/write permission. Now you can run limited sets of commends, including password change commands as the root user.
To change or reset your forgotten password, run the commands below.
sudo passwd username
Replace username with your account name or user name for the machine. If you have to root account enabled, you should replace username with root to change the root password.
When you run the above commands, you’ll be prompted to create and confirm a password for the account name you mentioned. create it and you’re done.
When you’re done, type reboot to restart your machine.
Fix invisible mouse in ubuntu 14.04
Fixing this problem is rather too easy. Open a terminal by using shortcut keys Ctrl+Alt+T and run the following command
gsettings set org.gnome.settings-daemon.plugins.cursor active false
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