I followed this answer and ran the following commands on my 15.10 with Unity Desktop to boot to text mode:
sudo systemctl enable multi-user.target --force sudo systemctl set-default multi-user.target
The first command gave me the following output though, but I proceeded anyway:
The unit files have no [Install] section. They are not meant to be enabled using systemctl. Possible reasons for having this kind of units are: 1) A unit may be statically enabled by being symlinked from another unit's .wants/ or .requires/ directory. 2) A unit's purpose may be to act as a helper for some other unit which has a requirement dependency on it. 3) A unit may be started when needed via activation (socket, path, timer, D-Bus, udev, scripted systemctl call, ...).
I also modified the
GRUB_CMDLINE_LINUX_DEFAULT="text" line in in
/etc/default/grub and ran
sudo update-grub afterwards.
The system then booted successfully into text mode and I could use the TTY1 login mask. But after that, I wanted to start the desktop using
startx $(which unity), which failed with the error message below (white text on red background btw.):
X.Org X Server 1.17.2 Release Date: 2015-06-16 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.13.0-68-generic x86_64 Ubuntu Current Operating System: Linux ecs-harigel-webserver 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.2.0-27-generic root=UUID=17983985-9c67-4e5b-a6fd-0c501c5abc41 ro text Build Date: 12 November 2015 05:33:29PM xorg-server 2:1.17.2-1ubuntu9.1 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.32.6 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Wed Feb 3 10:28:57 2016 (==) Using system config directory "/usr/share/X11/xorg.conf.d" The XKEYBOARD keymap compiler (xkbcomp) reports: > Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols > Ignoring extra symbols Errors from xkbcomp are not fatal to the X server Traceback (most recent call last): File "/usr/bin/unity", line 21, in <module> import glib ImportError: No module named glib xinit: connection to X server lost waiting for X server to shut down (II) Server terminated successfully (0). Closing log file.
startx /usr/bin/gnome-session --session=ubuntu and plain
startx bring me to a broken desktop consisting of only the wallpaper and an X-shaped cursor which only moves on the diagonal line from the top left corner downwards to the right..
If it helps, here's the output of
XDG_VTNR=1 LC_PAPER=de_DE.UTF-8 XDG_SESSION_ID=c1 LC_ADDRESS=de_DE.UTF-8 LC_MONETARY=de_DE.UTF-8 SHELL=/bin/bash TERM=linux HUSHLOGIN=FALSE LC_NUMERIC=de_DE.UTF-8 USER=bytecommander LC_TELEPHONE=de_DE.UTF-8 MAIL=/var/mail/bytecommander PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games QT_QPA_PLATFORMTHEME=appmenu-qt5 LC_IDENTIFICATION=de_DE.UTF-8 PWD=/home/bytecommander LANG=en_US.UTF-8 LC_MEASUREMENT=de_DE.UTF-8 SHLVL=1 XDG_SEAT=seat0 HOME=/home/bytecommander LOGNAME=bytecommander XDG_RUNTIME_DIR=/run/user/1000 LC_TIME=de_DE.UTF-8 LC_NAME=de_DE.UTF-8 _=/usr/bin/env
which python reports
/usr/bin/python, which is version 2.7.10.
Looking at python's
sys.path value, it's the same booting to text mode and booting to desktop, but compared to another 15.10 installation, the value
/usr/lib/python2.7/dist-packages/gtk-2.0 is missing here. I can't import
glib in python neither when booted to text mode nor in desktop mode. On the other 15.10 machine, that works.
python-dbus is installed in version
1.2.0-2build3 on both systems (the one which makes problems and the one I compare it to).
Why did this happen and how can I fix it to be able to start the GUI when booted into text mode?