I have a dual boot Ubuntu 16.04 and Windows. In the past, it always worked fine. Now, when booting up Ubuntu as usual from the GRUB menu, the screen flickers between a line saying
/dev/sda5/ clean, .../... files, .../... blocks
and a loading screen of Ubuntu. I have waited ten minutes at occasions, but it still didn't load.
If I boot up Ubuntu but add nomodeset after the quiet splash, it just shows the line /dev/sda5 clean ... and nothing happens.
I tried starting from recovery mode, and then resumed. This gives
[FAILED] Failed to start Clean up any mess left by 0dns-up
If I press Ctrl + Alt + F1, I can log in, and proceed as usual in a non-graphic environment.
This made me suspect there was something wrong with the driver. Indeed, the output from lshw -c video is rather odd: the configuration line says
configuration: latency=0
as if there's no driver. Furthermore, lspci -kvnn, in the VGA compatible controller has no line Kernel driver in use:. It does have a line Kernel modules: i915.
Things I've tried:
From https://ubuntuforums.org/showthread.php?t=2072420
sudo add-apt-repository ppa:ubuntu-x-swat/updates # x-updates has been replaced by updates
sudo apt-get install xserver-xorg-video-intel
sudo vim /etc/X11/xorg.conf
with the following text being put in the file:
Section "Device"
Identifier "Card0"
Driver "intel"
Option "AccelMethod" "sna"
EndSection
However, this didn't work: when rebooting normally, it would exhibit the same problems, and strangely, the xorg.conf file disappears.
So my question is: how can I get the Intel driver installed correctly?
Kernel modules: i915means the driver is installed, as expected with Intel graphics drivers. The problem is somewhere else. – Nov 23 '17 at 18:26