求助，openSUSE 13.2 英文版，在 KDE 下正常使用， 按 Ctrl+Alt+F1 进入 tty1（或者进其他 tty），按 Ctrl+Alt+F7 无法返回 KDE，貌似按任何快捷键都不会切换界面，但键盘可以正常使用，可以登录。
KDE 切换至 tty 下登录，然后 su root， startx
会闪过 KDE 桌面，然后弹出窗口提示： Call to lnusertemp failed (temporary deirectories full?) Check your installation. 按 okay 会返回 tty。
tyy 中显示
xauth: file /root/.serverauth.1802 does not exist
X.Org X Server 1.16.1
Release Date: 2014-09-21
X Protocol Version 11, Revision 0
Build Operating System: openSUSE SUSE LINUX
Current Operating System: Linux linux-uv3q 3.16.7-7-desktop #1 SMP PREEMPT Wed Dec 17 18:00:44 UTC 2014 (762f27a) x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.16.7-7-desktop root=UUID=41b6c3ea-770c-4b8a-b56e-946b4b5b7e14 ro resume=/dev/sda7 splash=silent quiet showopts
Build Date: 18 December 2014 02:06:21PM
Current version of pixman: 0.32.6
Before reporting problems, check 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.1.log”, Time: Fri Jan 16 11:47:27 2015
(==) Using config directory: “/etc/X11/xorg.conf.d”
(==) Using system config directory “/usr/share/X11/xorg.conf.d”
/etc/X11/xim: Checking whether an input method should be started.
sourcing /etc/sysconfig/language to get the value of INPUT_METHOD
INPUT_METHOD is not set or empty (no user selected input method).
Trying to start a default input method for the locale en_US.UTF-8 …
Checking for a default input method in /etc/X11/xim.d/en/
sourcing /etc/X11/xim.d/en/30-fcitx …
/etc/X11/xim.d/en/30-fcitx started sucessfully
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-table.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-pinyin.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-autoeng.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-chttrans.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-classic-ui.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-clipboard.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-dbus.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-freedesktop-notify.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-fullwidth-char.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-imselector.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-ipc.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-keyboard.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-kimpanel-ui.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-lua.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-notificationitem.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-pinyin-enhance.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-punc.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-quickphrase.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-remote-module.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-spell.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-unicode.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-vk.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-x11.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-xim.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-xkb.conf
(INFO-1842 /home/abuild/rpmbuild/BUILD/fcitx-4.2.8.5/src/lib/fcitx/addon.c:151) Load Addon Config File:fcitx-xkbdbus.conf
Error: cannot create directory “/run/user/0/ksocket-root”: No such file or directory
startkde: Call to lnusertemp failed (temporary directories full?). Check your installation.
xinit: connection to X server lost
waiting for X server to shut down (EE) Server terminated successfully (0). Closing log file.
另外，我还安装了 Fedora，可以正常切换 tty 和 gnome 。openSUSE 所在分区可用空间 21GB。