什么可能导致YaST2 GUI不出现在OpenSUSE Leap服务器上

我使用X-forwarding通过SSH连接到OpenSUSE Leap 42.2。 除了考虑系统完全新鲜（“服务器”选项）

1. sshd启用
2. 安装kde-cli-tools-5以获得kdesu
3. dolphin和konsole安装

我可以使用kdesu启动像konsole和dolphin这样的应用程序。但是，当我运行kdesu yast2 ，在出现的提示中input密码后，不会出现YaST窗口。 我的命令没有出现在控制台中，日志如下：

sudo cat /var/log/YaST2/

 Stage [1]: YaST2 startup level (1)... Stage [1]: ========================== |-- declare -x BOOT_IMAGE="/multiboot/openSUSE-Leap-42.2-DVD-x86_64/linux" |-- declare -x Cmdline="ramdisk_blocksize=4096 isofrom=/dev/disk/by-label/MULTIBOOT:/multiboot/openSUSE-Leap-42.2-DVD-x86_64/openSUSE-Leap-42.2-DVD-x86_64.iso isofrom_device=/dev/disk/by-label/MULTIBOOT isofrom_system=/multiboot/openSUSE-Leap-42.2-DVD-x86_64/openSUSE-Leap-42.2-DVD-x86_64.iso loader=syslinux" |-- declare -x EFI="0" |-- declare -x EGL_LOG_LEVEL="fatal" |-- declare -x ESCDELAY="10" |-- declare -x HOME="/" |-- declare -x InitrdID="2016-11-09.27c0ed7f" |-- declare -x InitrdModules="scsi_mod scsi_dh_alua scsi_dh_emc scsi_dh_rdac thermal libata libahci ahci mmc_core sd_mod cdrom sr_mod usb-common usbcore usbhid iscsi_boot_sysfs st sg" |-- declare -x Insecure="0" |-- declare -x InstsysID="2016-11-09.27c0ed7f" |-- declare -x Keyboard="1" |-- declare -x LD_LIBRARY_PATH=":/y2update/lib64:/y2update/lib:/y2update/plugin" |-- declare -x LIBGL_ALWAYS_INDIRECT="1" |-- declare -x Locale="en_US" |-- declare -x Manual="0" |-- declare -x MemFree="16237340" |-- declare -x OLDPWD |-- declare -x PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11/bin:/lbin" |-- declare -x PWD="/" |-- declare -x RepoURL="<RepoURL (may contain sensitive information)>" |-- declare -x SHLVL="4" |-- declare -x SSHD="0" |-- declare -x SelfUpdate="1" |-- declare -x Sourcemounted="0" |-- declare -x StartShell="0" |-- declare -x TERM="linux" |-- declare -x Textmode="0" |-- declare -x UpdateDir="/linux/suse/x86_64-leap42.2" |-- declare -x UseSSH="0" |-- declare -x VNC="0" |-- declare -x WithFCoE="0" |-- declare -x WithiSCSI="0" |-- declare -x XCURSOR_THEME="DMZ" |-- declare -x Y2GDB="0" |-- declare -x YAST2_SSH="false" |-- declare -x YAST_DEBUG="/debug/yast.debug" |-- declare -x YaST2update="0" |-- declare -x ZyppRepoURL="<ZyppRepoURL (may contain sensitive information)>" |-- declare -x initrd="/multiboot/openSUSE-Leap-42.2-DVD-x86_64/initrd" |-- declare -x isofrom="/dev/disk/by-label/MULTIBOOT:/multiboot/openSUSE-Leap-42.2-DVD-x86_64/openSUSE-Leap-42.2-DVD-x86_64.iso" |-- declare -x isofrom_device="/dev/disk/by-label/MULTIBOOT" |-- declare -x isofrom_system="/multiboot/openSUSE-Leap-42.2-DVD-x86_64/openSUSE-Leap-42.2-DVD-x86_64.iso" |-- declare -x kexec_reboot="1" |-- declare -x loader="syslinux" |-- declare -x ramdisk_blocksize="4096" |-- declare -x ramdisk_size="512000" |-- Creating hook script list: preFirstStage... |-- Level 1 stages: |-- F02-hwinfo |-- F03-umount |-- F04-language |-- F05-cmdline |-- F06-terminal |-- F08-logging |-- F09-start |-- F10-cleanup Stage [1]: Starting F02-hwinfo... Stage [1]: ====================== |-- Hardware detection for arch: x86_64 Stage [1]: Starting F03-umount... Stage [1]: ====================== |-- Trying to umount inst-sys exits with code: 32 Stage [1]: Starting F04-language... Stage [1]: ======================== |-- Language set to: en_US.UTF-8 |-- Starting UTF-8 mode... Stage [1]: Starting F05-cmdline... Stage [1]: ======================= Stage [1]: Starting F06-terminal... Stage [1]: ======================== |-- Setup virtual console: |-- Lines: 67 |-- Columns: 240 |-- Type: linux Stage [1]: Starting F08-logging... Stage [1]: ======================= |-- Set YaST2 LOG parameters: |-- Maximum log size: 5225153 kB |-- Maximum log count: 5 Stage [1]: Starting F09-start... Stage [1]: ===================== |-- Creating hook script list: preFirstCall... |-- Delegate program call to YaST2.call installation initial Stage [call]: Starting prequalification checks... Stage [call]: =================================== |-- Copying /etc/X11/xorg.conf.template to /etc/X11/xorg.conf |-- No SSH daemon running -> Medium SSH disabled Stage [call]: Evaluate medium selection... Stage [call]: ============================ Stage [call]: Check selected medium... Stage [call]: ======================== |-- Wished medium is: QT |-- Selected medium is: QT |-- X-Server is ready: 3781 |-- Allow big memory allocation: overcommit_memory=1 |-- Starting YaST2: |-- MODULE_NAME: installation |-- MODE_FLAGS: |-- MODULE_ARGS: ("initial") |-- MODE: qt |-- UI_ARGS: --noborder --auto-fonts --fullscreen |-- QT_IM_MODULE: xim 

sudo tail /var/log/YaST2/y2log

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 2016-12-27 15:36:47 <1> roku(3277) [ncurses] NCurses.cc(RedirectToLog):574 isatty(stdout)yes 2016-12-27 15:36:47 <1> roku(3277) [ncurses] NCurses.cc(init):284 have color = 1 2016-12-27 15:36:47 <1> roku(3277) [ncurses] NCurses.cc(init):309 screen size 22 x 80 2016-12-27 15:36:47 <1> roku(3277) [ncurses] NCstyle.cc(NCstyle):315 Init xterm using color => 4 styles in xterm 2016-12-27 15:36:47 <1> roku(3277) [ncurses] NCurses.cc(SetTitle):476 Draw title called 2016-12-27 15:36:47 <1> roku(3277) [ncurses] NCurses.cc(init):321 NCurses ready 2016-12-27 15:36:47 <2> roku(3277) [ui-shortcuts] YShortcutManager.cc(checkShortcuts):85 Not enough widgets with valid shortcut characters - no check 2016-12-27 15:36:47 <1> roku(3277) [ui] YPushButton.cc(setRole):170 Guessing function key F1 for YPushButton "Help" at 0x7f3760005b60 from button role YHelpButton 2016-12-27 15:36:47 <3> roku(3277) [libycp] clients/menu.rb:212 Unknown option `defaultButton in PushButton widget 2016-12-27 15:36:47 <1> roku(3277) [ui] YPushButton.cc(setRole):170 Guessing function key F9 for YPushButton "Quit" at 0x7f37600063f0 from button role YCancelButton 

什么可能导致任何GUI的无声失败出现？ 是否还有其他应该安装的软件包，或者其他可以检查的日志？