前两天发现了如题的问题,搜索了一下web,发现如下解决办法

finally got the solution edit grub menu, delete the word splash and write i915.modeset=1 keep everything as it is…. and finally backtrack runs on hard disk… and then make permanent changes in grub menu after backtrack starts go in /etc/default/grub, delete the word splash and write i915.modeset=1 thats it..