核心问题：
以下用于切换工作区（统一视口）的键盘快捷键不起作用。
- Ctrl+ Alt+Up用于切换上方工作区
- Ctrl+ Shift+ Alt+Up用于将窗口移动到上方的工作区
这些是已配置的窗口管理器键绑定（dconf dump /org/gnome/desktop/wm/keybindings/）：
move-to-workspace-left=['<Shift><Control><Alt>Left']
switch-to-workspace-left=['<Control><Alt>Left']
begin-move=['<Alt>F7']
maximize-horizontally=['disabled']
switch-to-workspace-10=['disabled']
switch-to-workspace-11=['disabled']
switch-to-workspace-12=['disabled']
switch-to-workspace-1=['<Super>Home']
switch-to-workspace-2=['disabled']
panel-run-dialog=['<Alt>F2']
switch-to-workspace-3=['disabled']
switch-to-workspace-5=['disabled']
switch-to-workspace-6=['disabled']
switch-to-workspace-7=['disabled']
switch-to-workspace-8=['disabled']
show-desktop=['<Control><Super>d']
raise=['disabled']
maximize=['<Control><Super>Up']
switch-to-workspace-9=['disabled']
begin-resize=['<Alt>F8']
switch-to-workspace-4=['disabled']
toggle-above=@as []
panel-main-menu=['<Super>s']
unmaximize=['<Control><Super>Down']
switch-input-source=['Caps_Lock']
switch-to-workspace-right=['<Control><Alt>Right']
move-to-workspace-down=['<Shift><Control><Alt>Down']
move-to-workspace-1=['<Primary>Alt_L']
switch-to-workspace-down=['<Control><Alt>Down']
toggle-shaded=['<Control><Alt>s']
minimize=['<Control><Alt>KP_0']
switch-windows-backward=['disabled']
toggle-on-all-workspaces=@as []
lower=['disabled']
activate-window-menu=['<Alt>space']
maximize-vertically=['disabled']
move-to-workspace-up=['<Shift><Control><Alt>Up']
move-to-workspace-right=['<Shift><Control><Alt>Right']
toggle-maximized=['<Control><Alt>KP_5']
switch-input-source-backward=['<Alt>Shift_L']
close=['<Alt>F4']
switch-windows=['disabled']
switch-to-workspace-up=['<Control><Alt>Up']
系统信息
- 联想 ThinkPad Edge e330
- 操作系统：Ubuntu 16.04 LTS
- 4.4.0-31-generic #50-Ubuntu SMP 星期三 7 月 13 日 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux