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Pheonix
Asked: 2015-07-03 14:43:58 +0800 CST

Ubuntu 15.04 Login fails and returns to login

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I recently upgraded my desktop from an NVIDIA 560ti graphics card to a 970 SC. Before upgrading the card, I updated to Vivid Vervet with no issues. After upgrading the card, my login screen is blown up (maybe 720p) as opposed to 1080p on the old card, and login attempts result in some text flashing by and a return to the login.

I also tried booting into the LiveUSB version of 14.10, but this failed too.

I'm certain the problem lies in the new graphics card. Several other threads suggest installing new or experimental drivers, but I can't even access the terminal. Is there any official support for the new card, or am I out of luck for now?

drivers

1 Answers

  1. Best Answer

    There were a lot of questions on askubuntu about constantly returning to the login screen.

    I've upgraded machines with AMD and nVidia cards from 14.04 to 15.04 (through 14.10) and on both I had this issue. (proprietary drivers)

    Both resolved.

    For nVidia

    When in login screen, launched the terminal: Ctrl+Alt+F1

    found the drivers:

    dpkg -l | grep nvidia

    reinstalled them with apt-get remove <package name> and apt-get install <package name>

    For AMD

    In login screen launched the terminal: Ctrl+Alt+F1

    found the drivers:

    dpkg -l | grep amd

    and just removed them with apt-get remove <package name>

    MESA opensource drivers were installed, so it worked.

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