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Re: [LUG] Grub Problem
- To: list@xxxxxxxxxxxxx
- Subject: Re: [LUG] Grub Problem
- From: comrade meowski <mr.meowski@xxxxxxxx>
- Date: Sat, 15 Aug 2020 19:13:39 +0100
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On 15/08/2020 18:53, Neil wrote:
I am reporting back, with a successful outcome. So, many thanks for your
time, help and expertise. (I am not pretending that I understand all
that went on, mind). There was no need to mess with the BIOS.
MX is the first distro I have come across with this boot repair
facility. Perhaps there are others, which I have not noticed. Anyway, it
has turned out to be very useful in this case. Now I will have a look at
ventoy.net.
Credit where it's due chief, you're getting good at fixing stuff now.
Mind you, you do seem to get a lot of practice somehow :]
There are no negative point awarded for this but _if_ you'd looked
really closely at the apt dist-upgrade output the last time you updated
the PC there would have been an error printed to console. Not a big one
(especially considering how critical the error was) but it would have
said amongst the sea of usual text something like "grub-pc: failed" with
a warning that the bootloader was NOT reinstalled successfully. That
would have been your only clue and most people would have most likely
missed it, including me. Quite probably the warning would have even
scrolled off the top of your console window and so wouldn't have been
visible if you had for example run the update and then flipped away to
something else entirely like a web browser while it finished.
This was originally a major Grub security mistake upstream initially
(aka "boothole" or CVE-2020-10713) that required an unusually major
client-side fix (reinstalling and resetting the bootloader). Loads of
distros did not handle the implementation of that fix in their package
managers at all well and apparently MX Linux was one of them. Your
laptop dodged it because it's UEFI and the grub2 package behaves very
differently there compared to BIOS.
Super nasty bug anyway, surprised nobody else has run into it yet.
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