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Thread: Macbook Pro 8,1 + Maverick

  1. #741
    Join Date
    May 2010
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    75

    Re: Macbook Pro 8,1 + Maverick

    After some hours parsing this thread, I feel I better comprehend the MBP82 EFI situation, but there's a number of obscure areas still ! Starting with backlight management (for the record, I'm using the IGD thanks to the LVDS dual channel patch, with the radeon switched off at boot through grub's outb commands).

    So, I applied the apple_bl patch that was proposed by sloth on http://ubuntuforums.org/showpost.php...&postcount=259 to Debian's Linux 3.1.1 sources (but didn't "patch" applesmc) and after removing acpi_backlight=vendor from the kernel boot options, got some results by loading apple_bl with the use_gmux=1 option, though it issues an error:
    Code:
    [   13.837906] apple_backlight: host->vendor == 8086 gmux = 1
    [   13.837917] apple_backlight: cannot request backlight region 1
    ...and seconds later a fat warning/error with a trace (see attachment).

    Still, I can get backlight readings and set the backlight using the xbacklight program. However, the F1/F2 keys are not working, and pommed refuses to start in EFI mode.

    Also, the keyboard backlight is now enabled when X starts, but quickly switches off by itself. F5 doesn't help here either. Here's what the log says:
    Code:
    [   14.117009] Registered led device: smc::kbd_backlight
    [...]
    [   22.356982] applesmc: light sensor data length set to 10
    [   36.577601] applesmc: ALV0: read data fail
    Last but not least, suspend to RAM seems to work (I haven't left it sleeping too long yet), but it gets stuck on a text console upon resume, and I have to manually switch back to tty1 and then back to tty7 to get back to Xorg. Before the backlight patch, it worked flawlessly (I left it sleep for a night).

    So, some questions to you guys who are booting in EFI mode:

    • how are you managing screen backlight? Did you get the F keys working?
    • is everyone having such errors upon loading the apple_bl driver? Am I missing some options?
    • is there a workaround for the keyboard backlight? I don't need it, but hey, if it's there, I may as well use it sometimes!
    • any workaround the suspend/resume bug?

    You'll find a full dmesg as an attachment, and specific sections containing the first trace when loading apple_bl, and the sleep/resume log.

    Thanks a lot in advance for your input/help!
    Attached Files Attached Files
    Last edited by dentifrice; November 23rd, 2011 at 03:05 AM. Reason: typo

  2. #742
    Join Date
    Apr 2006
    Location
    Chicago
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    1,405
    Distro
    Ubuntu

    Re: Macbook Pro 8,1 + Maverick

    Quote Originally Posted by dentifrice View Post
    I would start right here with the first post on this very page we're on: http://ubuntuforums.org/showpost.php...&postcount=731

    Beware though, you'll probably find yourself spending lots of hours going back and forth this thread. I'll try to write a detailed walk-through (Debian specific, but most if not all of it applies to Ubuntu as well I guess) once I get there.
    Thanks man. I already have started, I'm taking it real slow
    Constant development is the law of life, and a man who always tries to maintain his dogmas in order to appear consistent drives himself into a false position - Mahatma Gandhi

  3. #743
    Join Date
    Apr 2006
    Location
    Chicago
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    1,405
    Distro
    Ubuntu

    Re: Macbook Pro 8,1 + Maverick

    I get an error when I try to apply the lvds patch.
    patch: **** malformed patch at line 16: format, 2=24 bit '2.1' format, 3=force older 18 bit format");
    Update: I fixed the patch problem but the patch fails to apply. All hunks fail. Should I only be doing this on a 3.1 and up kernel?
    Last edited by hanzomon4; November 24th, 2011 at 06:14 PM.
    Constant development is the law of life, and a man who always tries to maintain his dogmas in order to appear consistent drives himself into a false position - Mahatma Gandhi

  4. #744
    Join Date
    Oct 2011
    Beans
    6

    Re: Macbook Pro 8,1 + Maverick

    I'm curious, why don't we have a way to switch between discrete/integrated graphics within the OS? Is it some proprietary mechanism that hasn't yet been reverse-engineered?

  5. #745
    Join Date
    May 2010
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    75

    Re: Macbook Pro 8,1 + Maverick

    Quote Originally Posted by hanzomon4 View Post
    Thanks man. I already have started, I'm taking it real slow
    Okay, here's my ongoing howto : http://dentifrice.poivron.org/laptops/macbookpro8,2/

    If anyone has fixes for what I couldn't get to work, please share.

  6. #746
    Join Date
    Jun 2011
    Beans
    19

    Re: Macbook Pro 8,1 + Maverick

    Just in case someone didn't notice:

    Kernel 3.2-rc3 has support for BCM4331 (WiFi). You have to compile BCMA and B43 including B43_BCMA and B43_PHY_HT.

    It auto loads, doesn't need any patches o work. It even reports signal

    Problems:
    1) It can be not stable... I can not do much about it We got some report about problem after some time of using it. However it should not hang your machine (like ndiswrapper use to AFAIK)
    2) No support for HT for 5 GHz (max is 54M and 2.4 GHz only).
    3) You have to unload b43 and bcma before suspend

  7. #747
    Join Date
    Jan 2007
    Beans
    21

    Re: Macbook Pro 8,1 + Maverick

    Hi all

    Since last update, suspend/resume does not work anymore on my 13" model.
    Kernel is 3.0.0-13-generic 64 bits and I am running on BIOS mode.
    I installed the last b43 module.

    Does somebody have any idea of what's going on ?

    Regards.

  8. #748
    Join Date
    Sep 2006
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    Hidden!

    Re: Macbook Pro 8,1 + Maverick

    Has anybody managed to get the LVDS channels thing working with kernel 3.2?

    I tried 3.2-rc3 using my trusty set of patches and config which work fine on 3.1, but I get stuck with a black screen trying to EFI boot and use the Intel graphics.

  9. #749
    Join Date
    Nov 2011
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    3

    Re: Macbook Pro 8,1 + Maverick

    Thank you for your wonderful information.

  10. #750
    Join Date
    May 2011
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    25

    Re: Macbook Pro 8,1 + Maverick

    Quote Originally Posted by dentifrice View Post
    Okay, here's my ongoing howto : http://dentifrice.poivron.org/laptops/macbookpro8,2/

    If anyone has fixes for what I couldn't get to work, please share.
    Nice write up!

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