Post B6JvHOLr9Z9v2mqdhQ by craigbro@infosec.exchange
 (DIR) More posts by craigbro@infosec.exchange
 (DIR) Post #B6Ie7sFpECnmVjwWae by justine@snac.smithies.me.uk
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       Just did a doas sysupgrade -s on my #OpenBSD desktop as i do most days and today when it rebooted it fails to boot. Yet if I just type b followed by enter it then boots correctly ???I'm at a loss what that last update on the -current` snapshot did ??kern.version=OpenBSD 7.9-current (GENERIC.MP) #475: Thu May 14 12:34:48 MDT 2026    deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MPIt won't boot by itself when I normally hit enter at the boot prompt before. Now I enter b and it boots ???Really strange as on boot I get an error 255 unknown. But some times after many fails it will boot into bsd.sp and others into bsd.mp yet when I type ls at the boot prompt bsd.mp isn't there ??? I think that last snapshot messed something up.
       
 (DIR) Post #B6JX27RxJTRjNfsxt2 by justine@snac.smithies.me.uk
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       [ Resolved ] - See https://snac.smithies.me.uk/justine/p/1778939704.486979Just did another doas sysupgrade -s and still it will not boot into the bsd.mp yet it boots with bsd.sp ??I just get reading symbols then error 255 unknown for the mp kernel.How can I fix this issue on my Intel #OpenBSD desktop?
       
 (DIR) Post #B6JpPoHs0duO4dc9s8 by joel@tumfatig.net
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       @justine isn’t error 255 related to bootloader? I would try forcing a reinstall from a booted environment.
       
 (DIR) Post #B6JpPoSrLmhOcikw08 by justine@snac.smithies.me.uk
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       I can make it boot into bsd.so ok so how would I force a boot loader reinstall ?
       
 (DIR) Post #B6JpyOOkFxKpupJvFY by joel@tumfatig.net
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       @justine I don’t remember the exact syntax. But I remember doing things from from the installboot manpage once or twice. Sorry to not be more precise.
       
 (DIR) Post #B6JpyObrTBpKZVSOh6 by justine@snac.smithies.me.uk
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       Cool thanks and no need to apologise I really appreciate the help.
       
 (DIR) Post #B6JvHOLr9Z9v2mqdhQ by craigbro@infosec.exchange
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       @justine are bootloaders still sensitive about root partition size?  Maybe the boot.mp is not in a location it can read. Only guessing based on ancient border fails from my youth.
       
 (DIR) Post #B6JvHOXuQknfeAUGUC by justine@snac.smithies.me.uk
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       Hmm not sure but it has the default setup as far as partitions go. Nothing has changed apart from running yesterday as I normally do daily doas sysupgrade -s