BOOTscreen problem [Solved]

Discussion in 'Mac Pro' started by expede, May 30, 2018.

  1. expede macrumors regular

    expede

    Joined:
    Jan 15, 2018
    Location:
    Sweden
    #1
    Hi!

    I´m quite exited regarding the thread with NVMe driver but I got a problem. I have bought a Samsung NVMe 512 GB M2 and when I have the blade inserted in the PCIe slot (with adapter of course) the bootscreen goes away??
    If I remove the blade, the bootscreen returns. I have a cMP 5,1 and earlier I had a SSD from OWC on one of their adaptors (Sonnet) and I had the same problem. I returned to Sonnets homepage and they stated there that their SSD adaptor did not support Bootscreen in cMP 5,1. They supported Bootscreen in 4,1 but not 5,1. Is this a known issue between 5,1 and 4,1?

    So, are there any of you that recognize this problem? What can I do? I am trying to get my cMP 5,1 to boot from NVMe blade. I do have my ADM Radeon HD 7950 Mac Edition mounted and the switch in mac mode.

    Best regards

    /Per
     
  2. crjackson2134 macrumors 68040

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #2
    Are you trying to boot from that NVMe drive, or are you saying that you lose video output even when it's inserted for non-boot use?
     
  3. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #3
    "Boot screen" is more for "the ability of displaying something", not the "ability to use boot manager".

    AFAIK, the Sonnet card only breaks the boot manager, but not the boot screen. e.g. you can still upgrade firmware with Sonnet Tempo SSD card installed. Or Single user mode still works.

    To boot from NVMe, unless you mod the firmware already. Of course it won't shows up in the boot manager, because it's not natively supported.

    https://forums.macrumors.com/threads/mp51-0084-b00-rom-dump-request.2119496/#post-26075700
     
  4. expede thread starter macrumors regular

    expede

    Joined:
    Jan 15, 2018
    Location:
    Sweden
    #4
    Hi and thank you all (crjackson2134, h982679)!

    I´m sorry it was late yesterday and I have been following the bootflash thread for a week, so this is my problem;

    I can not choose startup disk while holding down alt-key at start up. I only get white screen when booting from my SSD in bay 1 (SH 10.13.4). My cMP will not let me choose while the Samsung EVO 960 adaptor is mounted (slot 3-the PCIe-switch slot). When I pull the adaptor out the cMP 5,1 gets its bootscreen/alt-key function back. This is why I´m "babling" about my old set up with Sonnet. Sorry got confusing. So;

    It is the alt-key at start up. No screen there while the "blade" is there. If I clone the SSD in bay 1 to the "Blade" I can see it in the bootmanager, in prefereces.

    Best regards

    /Per
     
  5. MIKX macrumors 6502a

    MIKX

    Joined:
    Dec 16, 2004
    Location:
    Japan
    #5
    expede

    Did you flash your bootROM for NVME DXE booting ?

    Have you done any other NVMe hacks ?
     
  6. crjackson2134, May 30, 2018
    Last edited: May 30, 2018

    crjackson2134 macrumors 68040

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #6
    Okay, I can only guess here but... It’s probably trying to identify and make a connection with the drive.

    My NGFF drive is an Apple SSUBX and does something similar in Slots 3/4. What PCIe adapter are you using?

    Mine will eventually display but it can take 1-2 full minutes. How long have you allowed it to sit on that screen before giving up?

    That may not be your answer, but it’s worth trying.

    Also, I can put mine in Slot 2 and it’s a pretty fast boot process by comparison (including the boot manager screen) so you mught want to try Slot 2 but be aware it will run at 1/2 speed in that slot.
     
  7. expede thread starter macrumors regular

    expede

    Joined:
    Jan 15, 2018
    Location:
    Sweden
    #7
    Hi MIKX!

    No, not yet. I want to fix this first. I´m on untouched BootRom. I might think it is the adaptor that mess up the alt-key boot-thing.

    /Per

     
  8. MIKX macrumors 6502a

    MIKX

    Joined:
    Dec 16, 2004
    Location:
    Japan
    #8
    If you haven't flashed the bootROM yet then your 5,1 High Sierra CANNOT boot natively from NVMe at all.
    . . except in a Fusion setup which i have up and running ( foxfoobar's hack ).
     
  9. crjackson2134 macrumors 68040

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #9
    If I understand correctly, he’s not trying to boot from it. He’s being blocked from seeing the boot manager at all times when the card is installed.
     
  10. expede thread starter macrumors regular

    expede

    Joined:
    Jan 15, 2018
    Location:
    Sweden
    #10
    Absolutely correct!

    /Per

     
  11. expede thread starter macrumors regular

    expede

    Joined:
    Jan 15, 2018
    Location:
    Sweden
    #11
    Well, well!!

    Updated to Sierra High 10.13.5 and it fixed my Bootscreen. Everything is back to normal.

    /Per
     
  12. crjackson2134, Jun 1, 2018
    Last edited: Jun 1, 2018

    crjackson2134 macrumors 68040

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #12
    EXCELLENT! Now let's see if it fixes my shutdown anomalies...

    EDIT:
    Just checked, it doesn't fix my weird shutdown graphic...
     
  13. MIKX macrumors 6502a

    MIKX

    Joined:
    Dec 16, 2004
    Location:
    Japan
    #13
    expede

    Have you done the DXE_NVMe "boot from NVMe yet ? I

    Also, which Samsung blade do you have ? ( I have the 960 EVO )

    Samsung blades are not 4k compatible but Gilles says the eDXE injection will work in High Sierra.

    It would be nice to see that Samsung blades DO boot with the new 10.13.5 upgrade and the new bootROM too.
     

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