My laptop is a toshiba satellite C55.
Here is the url for the boot-repair
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Sign up to join this communityMy laptop is a toshiba satellite C55.
Here is the url for the boot-repair
If you want to keep only Ubuntu (and no Windows), then the best option is to do a clean install and during the install wipe (format) the entire hard disk..
That way you have a clean system and rest of the things will work fine
This problem is quite tricky to solve from what I've seen. If you changed your display driver(from X.Org Nouveau) to NVIDIA you will need to do the following:
Otherwise, it could be a BIOS setting, as suggested here.
Then again, a clean install of Ubuntu is supposed to work.