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Yesterday, I had to install some firmware updates from my Windows partition, which got completed successfully. I loaded up Ubuntu to check if everything was alright after the update but when I did, my screen went black and it started showing me some colorful dots on the upper half of my screen. It loaded up Ubuntu when I pressed the power button again, but it reloads the page a few times before I can actually login

I want to know how I can make my Ubuntu boot up normal and smooth again.

A picture of my issue is given below https://i.stack.imgur.com/tCLFn.jpg

I'm using a Lenovo Y540 with a 1TB SSD running Windows 10 alongside Ubuntu 20

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  • @nmath I’m describing what my system is doing. I want to know how I can fix my boot up of Ubuntu.
    – rishi
    Oct 9, 2020 at 5:12
  • I'm suggesting that it's not clear what you need help with. When you say "Everything seemed alright but now whenever I try to change my screen brightness", it would seem that you don't have any problems with booting, but you have a problem with screen brightness. You should edit your question (and the title) to reflect this and to add detail. Please read How to Ask for some tips on how to provide detail to increase your chances that someone will recognize the problem and be able to propose a solution
    – Nmath
    Oct 9, 2020 at 5:16
  • @nmath Please take a look and let me know if It’s better described. I apologise if I’m unable to describe it properly, I’m really new to Ubuntu and don’t know what I’m facing issues with
    – rishi
    Oct 9, 2020 at 5:22
  • @nmath I suspect that those colourful dots are error messages which are not being displayed properly. I tried to reinstall Ubuntu after the update but I was facing the same issues again, but I loaded up Ubuntu in safe graphics mode during setup and it was working perfectly. Do you how I can default to that mode? Also is there a way to rollback to previous firmware update?
    – rishi
    Oct 9, 2020 at 5:32
  • @nmath Ok I’ll upload a picture
    – rishi
    Oct 9, 2020 at 5:36

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