On Jan 7, 2014, at 10:19 AM, andr...@heider.io wrote: > Am 2014-01-03 19:38, schrieb SevenBits: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> On 01/03/2014 01:46 AM, Vladimir '?-coder/phcoder' Serbinenko wrote: >>> On 31.12.2013 00:11, SevenBits wrote: >>>> On Monday, December 30, 2013, Andreas Heider wrote: >>>> The EFI on current macbooks configures hardware differently >>>> depending on wether it is booting Mac OS X or a different os, for >>>> example disabling the internal GPU completely on some models. >>>> Mac OS X identifies itself using a custom EFI protocol. >>>> This adds a command that fakes the os identification, making all >>>> hardware accessible. >>>> Just a question: I do a lot of booting Linux on MacBooks, and I >>>> frequently suffer from this issue. How do we know that this code >>>> actually works? >>> Run on a mac with this code and without and compare results. The >>> ship of "works by sane design" has long since sailed away. For >>> most manufacturers it's somewhere in Moon orbit but for apple it >>> has long since left solar system. >> So, Andreas, I tried your patch, and... no dice. The Mac behaves >> exactly as before. I'm afraid it didn't appear to do anything for me. > > Hi, > thanks for testing! I suspect that your MacBook Pro is simply too old. I > don't know exactly when this protocol was introduced, I found references to > it on Hackintosh-Forums from a while ago and in the Mac OS X internals book > which is also a bit older. > > What effect exactly were you looking for? Your MBP doesn't have a second GPU > to disable. > Also, AFAIK the older models disable less hardware when you boot via EFI than > the newer ones, since Bootcamp with EFI wasn't supported.
I was looking for any change in the video behavior. You are correct that my MBP does not have a second GPU, but I was looking for any change at all that might indicate the patch worked. Anyway, the patch didn’t work on my machine, so I guess the point is moot. > >> Furthermore, your patch didn't print any output. There wasn't any >> error message returned (i.e your "Could not locate the apple set os >> protocol." message on line 52-53). When I invoked your command from >> the GRUB normal prompt, it DID print the message however. Perhaps it >> doesn't fail if called from within a grub.cfg, or maybe it simply >> doesn't print. > > If it prints something on the promt I'd say it's working as intended, > although I'm pretty sure that I see output from it when I boot a grub.cfg > entry. > >> The Mac that I tested on was a MacBook Pro from early 2008. Clearly, >> this function isn't present on all models. I can try it on others and >> seeing if it works on them, however. > > If you have the time, please do. I'd be interested in what exactly changes. Perhaps it would be a good way to see which MBPs have this protocol as well. > >> Also, why the if statements on lines 59 and 65, which indicate whether >> the OS version and/or vendor was set. What is the point of them? Why >> not just call the functions directly? > > It's just some output so you know that the command did something. > >>> _______________________________________________ Grub-devel mailing >>> list Grub-devel@gnu.org >>> https://lists.gnu.org/mailman/listinfo/grub-devel >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.14 (GNU/Linux) >> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ >> iQEcBAEBAgAGBQJSxwOMAAoJEFbRvtGxmFPELWoH+QGu7aLuDam0vY+xW8h4TdFw >> ckY51K8vgEGlpUNvK2fwQnnAt57W3jH14HBIRY1IaC+c9XA3mooqp748xh0jfoV/ >> D95lZJuYu3XP4iFYtCehcCVOiz+x4DNXMnT6WA6hd5FjPT9xqbBqf/9RxSpN9O+i >> ZGbSe/ZQkOvTyLXJ11L3SeTlNi9jqA03mLaMrMi7Ehb7AU3hBkiSMpiiIcUjnP3o >> ZskQrSkguqt9Kt+FlHheTJkpAitqqJR/GpHkegg3bNGLrflacVGITMFFw0EsJP4R >> h0fsEocfYnvSVPrw07SJVFvt2TzPGB69p5QXy11cU1ZBYUhILcG7rDTAmVctZig= >> =wKye >> -----END PGP SIGNATURE----- >> _______________________________________________ >> Grub-devel mailing list >> Grub-devel@gnu.org >> https://lists.gnu.org/mailman/listinfo/grub-devel > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel
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