裝了一天了，各種問題啊，安裝qvfb2出現了這個問題：
checking for Qt... configure: error: Qt (>= Qt 3.0.3) (headers and libraries) not found. Please check your installation!
For more details about this problem, look at the end of config.log.
解決方法：(因爲需要qt-3.3作支持，所以需要先安libqt3-mt,libqt3-mt-dev,下載qt-devel-3.3.8-4.fc7.i386.rpm,然後用alien轉爲deb,再用dpkg -i --force-overwrite 來安裝此包)
sudo apt-get install libqt3-mt （一直是找不到包，後來重新換個ubuntu版本纔好）
sudo apt-get install libqt3-mt-dev
sudo apt-get install alien
sudo alien qt-devel-3.3.8-4.fc7.i386.rpm
dpkg -i --force-overwrite qt-devel-3.3.8-4.fc7.i386.deb
(開始安qvfb)
cd qvfb2-2.0
./configure --with-qt-includes=/usr/lib/qt-3/include --with-qt-libraries=/usr/lib/qt-3/lib --with-qt-dir=/usr/lib/qt-3
sudo make
sudo make install
(qvfb2與1不同，沒有文件輸入是不會顯示出框圖的)
