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Thinkpad display card has conflicts with vboot. Try to use vboot_black_screen for the boot loader, read below:
16.2 Black screen or other boot loader issues
VBoot Loader reserves a memory region for use, this might have conflicts with other devices. For example, there are reports that ATI graphic cards cause black screen during boot. If you get into this problem, you can try to use a different boot file. We provide a file "vboot-black-screen" in c:\vboot folder, you need to rename this file to "vboot". Make sure you backup the original "vboot" file. |
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