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Because of two issues i am not able to login on my ubuntu system. After submitting the credentials on the login GUI I get redirected back to it.

  1. something got broken on nvidia config. i just want to restore my old xorg. I cannot access any terminal. i ve tried the "text" kernel param but it does not work.

  2. moreover any tty is blank screen i think because of a resolution problem of my hidpi laptop display. I ve tried also booting in recovery mode. I can just get into a read only system.

Any suggestion on how to solve this? ubuntu 16.04

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About the second part: You have to remount the filesystem, mount -o remount,rw /. Then you should be able to fix the problem. If you need further help post some logs, they should help finding out the problem.

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I managed to solve adding the "text" kernel param on the Grub entry with "upstart". That would boot with a console. Then checking the logs (~/.xsession-errors.log) I could see .Xresources and .xprofile files had some invalid content. After cleaning those files I was able to login again.

TTYs are still blank though. But that's a different problem.

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