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I need to reset the BIOS. I took a look into my laptop, but the CMOS battery and the jumper are covered with a lot of stuff and I don't feel like taking all of that out. So is there a way of resetting the BIOS using Ubuntu?

Zanna
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modprobe nvram
dd if=/dev/zero of=/dev/nvram

Then reboot.

This resets the CMOS memory on most systems.

Zibri
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  • Most PC systems (so almost all desktop and server computers) don't have `/dev/nvram`. I've only really seen that on embedded systems. -1 – David Foerster Nov 22 '16 at 14:36
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    This is the correct answer, at least on Ubuntu 16+. You just need to modprobe nvram. I locked myself out of IPMI remote console by disabling a buggy USB chipset in BIOS earlier and this resolved it. – nod Sep 07 '17 at 23:46
  • /dev/nvram skips anyway the first 14 bytes of the real CMOS memory which contains the RTC (real time clock). To write also those 14 bytes you need a small C program, but usually is not needed. – Zibri Dec 08 '17 at 09:11
  • Does this reset bios administrator password ? I am struggling with it now :/ – Badis Merabet Mar 21 '21 at 07:20