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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Thaddeus‏ @BlueCollarMage 27 Jun 2020
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      Replying to @marcan42

      I think that's in BIOS itself? You gotta disable safe boot or whatever. If you're having trouble accessing the option, you have to give your BIOS a password before it'll let you deactivate it.

      1 reply 0 retweets 0 likes
    2. linked list liker‏ @leftpaddotpy 27 Jun 2020
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      Replying to @BlueCollarMage @marcan42

      that is not true. boot order is in EFI vars which, mostly for worse, means that self-centered operating systems can fuck with it. this is absolutely a problem on the windows side.

      2 replies 0 retweets 7 likes
    3. Farce Majeure 🌹‏ @vathpela 27 Jun 2020
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      Replying to @leftpaddotpy @marcan42

      No, it depends. There are firmwares out there that rewrite the boot entries despite everything we out in section 3 of the spec, and some that delete things they don't recognize (or even dumber...). I wonder if any stop you from creating BootOrder as an authenticated var... ;)

      1 reply 0 retweets 5 likes
    4. Farce Majeure 🌹‏ @vathpela 27 Jun 2020
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      Replying to @vathpela @leftpaddotpy @marcan42

      *everything we /put/ in section 3. *sigh*

      1 reply 0 retweets 3 likes
    5. Hector Martin‏ @marcan42 27 Jun 2020
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      Replying to @vathpela @leftpaddotpy

      It's Windows. It happens when I boot Windows. After putting Linux back on top it stays there until some Windows boot decides to change it back. I don't even boot Windows from the BIOS menu, I chainload it from GRUB so I don't even *need* that UEFI boot entry.

      1 reply 0 retweets 3 likes
    6. linked list liker‏ @leftpaddotpy 27 Jun 2020
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      Replying to @marcan42 @vathpela

      then the shitty strategy proposed above and on the Arch wiki of using bcdedit to have the Windows entry load GRUB is probably your best bet :)

      1 reply 0 retweets 1 like
    7. Hector Martin‏ @marcan42 27 Jun 2020
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      Replying to @leftpaddotpy @vathpela

      That won't work... Because I also boot this Windows install virtualized. And the *virtual* UEFI needs to have the Windows boot manager first, lest I accidentally boot Linux twice at the same time and corrupt everything. I just want it to stop touching my EFI vars :(

      2 replies 0 retweets 2 likes
    8. Farce Majeure 🌹‏ @vathpela 27 Jun 2020
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      Replying to @marcan42 @leftpaddotpy

      Hmm. What we need is a grub module that knows you're in a VM and let's you tell it to boot a different default when you are, so you can safely chain load without fear in the VM ;)

      1 reply 0 retweets 2 likes
    9. Farce Majeure 🌹‏ @vathpela 27 Jun 2020
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      Replying to @vathpela @marcan42 @leftpaddotpy

      (but yeah, I wouldn't be surprised if the tpm log changing is triggering this, and my mythical grub module won't help with that.)

      1 reply 0 retweets 1 like
    10. Thaddeus‏ @BlueCollarMage 27 Jun 2020
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      Replying to @vathpela @marcan42 @leftpaddotpy

      * I Told You So Voice * So disable TPM and SecureBoot! Either way, I hope you figure SOMETHING out. This is a shitty situation. What hardware are you on? ...so I maybe I can stay away from it, haha.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 27 Jun 2020
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      Replying to @BlueCollarMage @vathpela @leftpaddotpy

      SecureBoot is off. The TPM is on for secure key storage, though I don't really use it much. It shouldn't have anything to do with this I hope...

      9:25 PM - 27 Jun 2020
      2 replies 0 retweets 0 likes
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        2. Thaddeus‏ @BlueCollarMage 27 Jun 2020
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          Replying to @marcan42 @vathpela @leftpaddotpy

          Oh, you have an encrypted system? Or whaddaya use the TPM for?

          1 reply 0 retweets 0 likes
        3. Thaddeus‏ @BlueCollarMage 27 Jun 2020
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          Replying to @BlueCollarMage @marcan42 and

          I didn't know the specifics, but my problems have come when it's been from a presumed hardware change. Going in and out of a VM, it'll look like different hardware so Windows would reset things. it would make sense that'd trigger TPM stuff, because it looks like tampering.

          1 reply 0 retweets 0 likes
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        2. Farce Majeure 🌹‏ @vathpela 27 Jun 2020
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          Replying to @marcan42 @leftpaddotpy

          The tpm event log tells them the history of hash extends for all the firmware, option roms, and bootloaders during boot-up. Windows definitely uses that for things, especially if you're using bitlocker, but also for license crap. ...

          1 reply 0 retweets 1 like
        3. Farce Majeure 🌹‏ @vathpela 27 Jun 2020
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          Replying to @vathpela @marcan42 @leftpaddotpy

          Secure Boot is unrelated, and they probably aren't doing anything directly with it that you're seeing here, though the Secure Boot config variables do get hashed into tpm registers and the log, so it's best if they're the same (incl keyrings) between the two boot methods.

          1 reply 0 retweets 0 likes
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