To know your 3D graphic(s) controller(s) working (GPU or/and chipset) with your VGA output you can run the following command : /sbin/lspci | egrep 'VGA|3D' Example : /sbin/lspci | egrep 'V
To see your battery infos you can use acpi if you have it or directly see system files. Upower command# In both case you can use upower command to get some usefull infos: upower -i /org/freedesktop/UP
Change of Display Manager# Pass root sudo -i Then open /etc/sysconfig/displaymanager with a text editor. vim /etc/sysconfig/displaymanager Display Manager can be changed at line DISPLAYMANAGER="X
This work with Grub2: When you are on the bootloader, hover over your distribution name and press e (e for edit) You can now add options in the window that just opened On the line beginning with linu