The ThinkPad t61 installed with ubuntu11.04 cannot enter the BIOS.

After shutdown is used this afternoon, the BIOS cannot be entered at night, and it has been stopped at press thinkvantage..., so the BIOS cannot be accessed. After restarting (Force Shutdown), press the blue thinkvantage key or F1, F2, F11, and F12. The solution is to unplug all USB cables, including the mouse and turn off the wireless connection. As a result, the system is started again, and there are no sequelae yet. If not, try multiple times. As for the reason, I guess it may be because my ubuntu11.04 is not LTS, but it is not stable enough.