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1. #Ubuntu change graphics driver after start up Pc
2. #Ubuntu change graphics driver after start up series

You may get a specific error message or frozen splash screen, or you may just see Grub and nothing else, indicating it can't even find the most basic information required to proceed. If Grub is able to load, but can't find any bootable OS you'll find yourself with a number of scenarios: you may be presented with a basic command prompt such as grub> or grub rescue>, which indicates one or more files required by Grub are missing or corrupt. Jump to the Boot-Repair tool section once you've verified it's nowhere to be found.

#Ubuntu change graphics driver after start up Pc

If Grub isn't set to automatically appear when your PC starts, try rebooting while holding the Shift key or tapping Esc to bring up the Grub boot menu to confirm it's not able to even load itself. If this fails, then the problem is likely to be with your hard drive, and so the first places to look are the MBR and Grub. If you've overclocked your PC, eg, you should now enter the system EFI or BIOS and look for the option to load fail-safe defaults. If you're able to get as far as your PC's splash screen, but then your computer hangs or a 'missing operating system' error message appears, then first think back to any recent changes. This may involve replacing a component or something more drastic.

#Ubuntu change graphics driver after start up series

If you're lucky, your motherboard will emit a series of beeps or flashing lights you can use – again by enlisting the help of the internet – to identify the likely problem. If the computer now boots to the splash screen, you can try reconnecting the internal drives and trying again if you're now able to boot to the login screen, shut down your PC and start reconnecting your external peripherals to see if the problem has cleared itself or can be targeted to a single device, in which case try a different cable, or go online and Google for known boot problems involving that device.

If this doesn't work, open the case carefully and disconnect your internal drives too. If not, unplug all external devices except your keyboard and try again.