Ubuntu14.04目前仍是非常不穩定,使用VNC的時候,只有一個終端,檢查日誌以後,發現瞭如下錯誤:
$ cat /home/brett/.vnc/bt-desktop:1.log
……
gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
** (process:6694): WARNING **: software acceleration check failed: Child process exited with code 1
** (gnome-session:6694): CRITICAL **: We failed, but the fail whale is dead. Sorry....
……
簡單看了下,可能是gnome-session無法識別到OpenGL硬件加速導致的。該問題普遍存在於DELL大部分系列的服務器上。這個帖子提供了一種解決辦法,但我試了下,貌似是無效的。
解決辦法:
$ sudo apt-get install gnome-panel gnome-settings-daemon metacity nautilus gnome-terminal
$ vim ~/.vnc/xstartup #修改此文件,寫入以下內容
#!/bin/sh
export XKL_XMODMAP_DISABLE=1
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
gnome-panel &
gnome-settings-daemon &
metacity &
nautilus &
gnome-terminal &
然後重新啓動VNC終端即可
也可以通過安裝KDE/XFCE來解決:
$ sudo apt-get install gnome-core xfce4 firefox
$ vim ~/.vnc/xstartup #修改此文件,寫入以下內容
#!/bin/sh
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
startxfce4 &
#gnome-session --session=gnome-flashback &
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
============================================
後續補充:
Ubuntu14.04真是很差勁,使用VNC連接成功上桌面以後,S鍵、D鍵與Alt功能鍵相反了。
解決辦法:
#必須在圖形界面的終端裏操作,不能在遠程的終端裏操作
gsettings set org.gnome.desktop.wm.keybindings panel-main-menu "['<Alt>F1']"
gsettings set org.gnome.desktop.wm.keybindings switch-applications "['<Alt>Tab']"
gsettings set org.gnome.desktop.wm.keybindings show-desktop "['<Alt>d']"
gsettings set org.gnome.desktop.wm.keybindings maximize "['<Alt>Up']"
gsettings set org.gnome.desktop.wm.keybindings unmaximize "['<Alt>Down']"
#也可以運行dconf-editor在GUI界面中展開指定的項進行修改
2015.03.23補充:
VNC日誌裏出現如下錯誤:
error opening security policy file /etc/X11/xserver/SecurityPolicy
Could not init font path element /usr/share/fonts/X11/cyrillic, removing from list!
Could not init font path element /usr/share/fonts/X11/100dpi/:unscaled, removing from list!
Could not init font path element /usr/share/fonts/X11/75dpi/:unscaled, removing from list!
Could not init font path element /usr/share/fonts/X11/100dpi, removing from list!
Could not init font path element /usr/share/fonts/X11/75dpi, removing from list!
Could not init font path element built-ins, removing from list!
解決辦法:
sudo aptitude install xfonts-100dpi xfonts-75dpi xfonts-scalable xfonts-cyrillic
2015.03.24,關於windows下無法連接Ubuntu 14.04 VNC的問題,在網上發現了一個解決辦法(參考文章),但我試了下貌似不成功:
#必須在圖形界面的終端裏操作,不能在遠程的終端裏操作
sudo apt-get install dconf-tools
sudo dconf write /org/gnome/desktop/remote-access/require-encryption false
gsettings set org.gnome.Vino require-encryption false
更改背景圖片:
#必須在圖形界面的終端裏操作,不能在遠程的終端裏操作
sudo dconf write /org/gnome/desktop/background/picture-uri file:///usr/share/backgrounds/Forever_by_Shady_S.jpg
gsettings set org.gnome.desktop.background draw-background false
gsettings set org.gnome.desktop.background picture-uri file:///usr/share/backgrounds/Forever_by_Shady_S.jpg
gsettings set org.gnome.desktop.background draw-background true