ThinkPad X220 boot problem

balanga

Son of Beastie

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I've just installed FreeBSD 12.0-RELEASE on a ThinkPad T500 and it boots up ok, but the same disk does not boot up on a ThinkPad X220.
ISTR that when running BSDINSTALL on the X220 it does mention something about a BIOS bug for which FreeBSD installs a workaround. I'm not sure about the specifics, but is it possible to apply this fix to an existing installation?
 
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balanga

Son of Beastie

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I found a thread which mentions the problem here, but can't really figure out what I need to do. My system is using GPT but not UEFI. IIUC the problem may be related to /boot/pmbr or not having an active flag set...
 
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balanga

Son of Beastie

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Eventually decided to run bsdinstall to reinstall FreeBSD on the X220, and there is actually a prompt to allow you to apply a 'workaround' for this BIOS bug, and the the disk boots up OK.

Just wondered if anyone knew of any way to apply this 'workaround' independently of bsdinstall()?
 
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