ubuntu重新啟動就黑屏的原因以及解決方法：

顯卡驅動沒有裝好，需要安裝ubuntu的顯卡驅動，解決方法如下：

1.安裝完ubuntu后，打開“系統” → “系統管理” → “硬件驅動” → 選擇“ati驅動”進行安裝，重啟即可。

2.如果還是黑屏，需要按“ctrl＋alt＋f1”快捷鍵進入shell 界面，打開/etc/X11/xconf.org文件，根據以下代碼提示進行修改，例如：

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg
Section "Monitor"
Identifier "Configured Monitor"
HorizSync 31-101 ＃頻率范圍
VertRefresh 50-60 ＃刷新
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1440x900" ＃分辨率
EndSubSection
EndSection
Section "Module"
Load "glx"
EndSection
Section "Device"
Identifier "Configured Video Device"
Driver "fglrx"
EndSection