Black Screen Mountain Lion Installation

Discussion in 'Mountain Lion Laptop Support' started by xTRICKYxx, Jul 26, 2012.

  1. xTRICKYxx

    xTRICKYxx

    Joined:
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    Mobo:
    Lenovo Y550P - 10.7.4
    CPU:
    i7-820QM @ 1.73GHz
    Graphics:
    NVIDIA GeForce 240M
    Classic Mac:
    eMac
    Mobile Phone:
    Android, iOS
    Jul 26, 2012 #1
    xTRICKYxx

    xTRICKYxx

    Joined:
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    Mobo:
    Lenovo Y550P - 10.7.4
    CPU:
    i7-820QM @ 1.73GHz
    Graphics:
    NVIDIA GeForce 240M
    Classic Mac:
    eMac
    Mobile Phone:
    Android, iOS
    Hello, I cannot find anyone who has gotten around this yet.

    I have a Lenovo Y550P and I have a feeling a wide variety of notebooks and desktops alike may experience this.

    So, after trying several different USB thumb drives, re-downloading ML from the Mac App Store twice, and trying several different boot flag combinations, I give up. I just spent $20 on this and I really want to get it working.

    Hardware:

    i7-820QM
    NVIDIA GeForce GT 240M
    480GB Corsair Force 3 SSD
    8GB DDR3 RAM

    Issue: With or without -v flag, it boots the installation successfully (I believe) yet my screen is completely black. I have hooked up my laptop via HDMI to see if my external monitor would work.
    I tried GraphicsEnabler=No -v -x PCIRootUID=0
    Also, GraphicsEnabler=No -v -x PCIRootUID=1

    I have replaced nearly every component on this machine except for the CPU and GPU to be compatible thus far. Here is a video of the final seconds on a verbose boot: Mountain Lion 10.8 UniBeast black screen installation - YouTube

    I have made sure I followed all the steps in the guide.

    Anyone with this similar issue or outside advice? I have gotten this laptop from 10.6.8 to 10.7.4 with relative ease and now I can't even boot the installer for ML.
     
  2. ssdp_20072

    ssdp_20072

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    Mobo:
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    CPU:
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    Nvidia GeForce 310M
    Jul 26, 2012 #2
    ssdp_20072

    ssdp_20072

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    Mobo:
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    CPU:
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    did u try without GraphicsEnabler=No?
     
  3. xTRICKYxx

    xTRICKYxx

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    Mobo:
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    CPU:
    i7-820QM @ 1.73GHz
    Graphics:
    NVIDIA GeForce 240M
    Classic Mac:
    eMac
    Mobile Phone:
    Android, iOS
    Jul 26, 2012 #3
    xTRICKYxx

    xTRICKYxx

    Joined:
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    Mobo:
    Lenovo Y550P - 10.7.4
    CPU:
    i7-820QM @ 1.73GHz
    Graphics:
    NVIDIA GeForce 240M
    Classic Mac:
    eMac
    Mobile Phone:
    Android, iOS
    Yes. Still a black screen.
     
  4. ssdp_20072

    ssdp_20072

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    Mobo:
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    Intel Core i5 520M
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    Nvidia GeForce 310M
    Jul 26, 2012 #4
    ssdp_20072

    ssdp_20072

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    Mobo:
    Lenovo G460
    CPU:
    Intel Core i5 520M
    Graphics:
    Nvidia GeForce 310M
    Do u use a DSDT?? A dsdt with proper graphics edits and solve the problem.
     
  5. singj

    singj

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    Jul 26, 2012 #5
    singj

    singj

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    Mac:
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    I had the same issue - the installation appeared to boot correctly, but then the display lost signal and went to sleep. If I pressed RETURN in the dark, the USB drive would get all busy so I'm pretty sure the system didn't actually hang.

    I'm running the UEFI beta bios on my Gigabyte board so my installation was already devoid of any sort of graphics enabler - my 550Ti card was supported natively both in the UEFI BIOS and Lion.

    I tried typing in simply PCIRootUID=0 before hitting ENTER to boot from the Unibeast installation drive, and the black screen problem went away. I didn't use any of the other flags / commands you list here.

    Good luck!
     
  6. xTRICKYxx

    xTRICKYxx

    Joined:
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    Mobo:
    Lenovo Y550P - 10.7.4
    CPU:
    i7-820QM @ 1.73GHz
    Graphics:
    NVIDIA GeForce 240M
    Classic Mac:
    eMac
    Mobile Phone:
    Android, iOS
    Jul 26, 2012 #6
    xTRICKYxx

    xTRICKYxx

    Joined:
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    Messages:
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    Mobo:
    Lenovo Y550P - 10.7.4
    CPU:
    i7-820QM @ 1.73GHz
    Graphics:
    NVIDIA GeForce 240M
    Classic Mac:
    eMac
    Mobile Phone:
    Android, iOS
    Thanks. I'll try that. My 240M is natively detected so its confusing.

    PCIRootUID=0 by itself worked!!!! Thank you!!!! I swear I tried this by itself before....
     
  7. victor985

    victor985

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    Aug 10, 2012 #7
    victor985

    victor985

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    thx ;)
     
  8. hoogends

    hoogends

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    Oct 27, 2012 #8
    hoogends

    hoogends

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    Mobo:
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    Thanks guys

    Had same troubles as poster.
    PCIRootUID=0 by itself did the trick here too......

    :)
     
  9. jesperandreassen

    jesperandreassen

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    Dec 26, 2012 #9
    jesperandreassen

    jesperandreassen

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    PCIRootUID=0 worked for me as well!
    Thank you very much singj :)
     
  10. Rezabrya

    Rezabrya

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    Jan 30, 2013 #10
    Rezabrya

    Rezabrya

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    Can I ask everyone how exactly I'm supposed to put this edit in? My screen also turns off on my Lenovo Thinkpad T430 when I try and boot from the Unibeast drive...
     

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