Recently my Ubuntu 16.04 system upgrade the driver from 375.26 to 375.39. After the upgrade, I began to encounter bad borders around popup windows. I filed a bug report https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-375/+bug/1667158 to launchpad nvidia-graphics-drivers-375-package.
To avoid the inconveniences caused by the issue, I purged the ppa that upgraded my graphic driver so that I could use the graphic driver from ubuntu repository. After doing so, my X-window started to become blur after a few second following any screen event. This was worst.
So I tried to purge my system of all nvidia driver and to reinstall the 375.39 driver using Nvidia supplied .run file. There was some issue during the installation. When I rebooted, I ended getting stuck in a login loop.
I have described my issues in this post http://askubuntu.com/questions/887159/ubuntu-16-04-stuck-in-login-loop-after-attempting-to-install-nvidia-linux-x86-64.
After several failed attempts to install the .run file, because nouveau was still used by my system, I finally relented to using the nvidia ubuntu repository graphic driver 375.26 again. As described in my post, I do not even see a login window now. Instead I get a popup window informing me that i have to run in low graphics mode and the subsequent popup window with 4 follow-up action options don’t seem responsive.
openConnection: connect: No such file or directory cannot connect to brltty at :0 upstart: gnome-session (Unity) main process(2743) terminated with status 1 upstart: unity-settings-daemon main process (2735) killed by TERM signal upstart: Disconnected from notified D-Bus bus upstart: upstart-dbus-session-fridge main process (2659) terminated with status 1 upstart: bamfdaemon main process (2644) killed by TERM signal upstart: hud main process (2733) killed by TERM signal upstart: unity7 prestart process(2737) terminated with status 143 upstart: logrotate main process (2540) killed by TERM signal upstart: unity-panel-service main process (2750) killed by TERM signal
Can someone help me regain access to my X window? I need to use the nvidia graphic driver as I need to use CUDA.