Help! After kernel 2.6.16 is compiled, restart and enter the logon interface. Black and white bars are displayed.

Help! After kernel 2.6.16 is compiled, restart the system and enter the logon interface. Black and white bars are displayed. Linux general technology-Linux programming and kernel information. For details, see the following. I used fc5. Due to the need to use qt/embedded, I re-compiled the kernel and added framebuffer. After the restart, the black and white bars appeared when I entered the user name and password interface and crashed, later, after adding vga = 788 to grub, you can enter the system. However, when you run qt/embedded, the screen is displayed and the prompt "can't drive depth 8" is displayed, after restarting, black and white bars and vertical bars appear on the login interface, which cannot be solved.