[TIP] Windows 7 UEFI install without CSM

Discussion in 'Windows 7' started by °ツ, May 6, 2019.

Page 3 of 3
  1. The Freeman

    The Freeman MDL Novice

    Joined:
    Dec 7, 2018
    Messages:
    15
    Likes Received:
    8
    Trophy Points:
    0
    #41 The Freeman, Jul 3, 2020
    If you had kept your silence, you would have stayed a philosopher
     
  2. polygaryd

    polygaryd MDL Novice

    Joined:
    Nov 7, 2016
    Messages:
    44
    Likes Received:
    2
    Trophy Points:
    0
    #42 polygaryd, Jul 7, 2020
    Driver1998 do you have any input on why vgashim is having this error on my computer?
     
  3. mbc004

    mbc004 MDL Novice

    Joined:
    Jul 12, 2020
    Messages:
    12
    Likes Received:
    12
    Trophy Points:
    0
    #43 mbc004, Jul 13, 2020
  4. manatails

    manatails MDL Novice

    Joined:
    Jul 23, 2014
    Messages:
    37
    Likes Received:
    60
    Trophy Points:
    0
    #44 manatails, Jul 29, 2020
    The VgaShim method is very promising, it works flawlessly on a Kaby Lake SoC.

    But somehow the boot still fails on Gemeni Lake SoC even though VgaShim correctly maps INT10h entry point.
     
  5. manatails

    manatails MDL Novice

    Joined:
    Jul 23, 2014
    Messages:
    37
    Likes Received:
    60
    Trophy Points:
    0
    #45 manatails, Jul 31, 2020
    Last edited: Jul 31, 2020
    I did some tests with my own version of int10h compatibility module and I am starting to think that this has something to do with GOP drivers not natively supporting 1024x768

    Machines that fail even with VgaShim doesn't support 1024x768 in efi and Windows 7 freezes before int10h actually gets called

    edit: I could confirm it with custom compiled OVMF with 1024x768 resolution removed from QemuVideoDxe... fallback to 640x480 mode from the bootloader didn't work either
     
  6. manatails

    manatails MDL Novice

    Joined:
    Jul 23, 2014
    Messages:
    37
    Likes Received:
    60
    Trophy Points:
    0
    #46 manatails, Aug 3, 2020
  7. tktktkboom

    tktktkboom MDL Novice

    Joined:
    Aug 16, 2020
    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    0
    #47 tktktkboom, Aug 18, 2020
    As a longtime fan of GPT and UEFI thanks to Linux, I'm curious if this trick would improve boot times and performance on class 2 Legacy/CSM capable motherboards, especially relative to UefiSeven INT10H handler/GOP emulator. Some people seem to think not, but I have no idea where they got that info:
    If any of y'all got some sources, I know I should just use MBR and CSM but I must have perfection.
     
  8. wkeller

    wkeller MDL Member

    Joined:
    Nov 30, 2010
    Messages:
    155
    Likes Received:
    482
    Trophy Points:
    10
    #48 wkeller, Aug 18, 2020
    Last edited: Aug 21, 2020
    Try --> my solution.
    It doesn't require CSM emulation or any other third party (non-Microsoft) drivers.
    I have used Windows 10 bootloader, disabled legacy VGA and integrated vendor graphics drivers.
     
  9. justintime20

    justintime20 MDL Novice

    Joined:
    Feb 5, 2018
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    0
    #49 justintime20, Sep 9, 2020
    I was able to successfully install and boot into windows 7 on GPT m.2 with CSM enabled and secure boot disabled. I tried the advice OP gave, and I cannot boot into windows 7 with CSM disabled. This is weird because I got it to work on my laptop, but it won't work on my desktop (asus x99 usb 3.1, intel i7 5960x). Any solutions? I'm trying to do dual boot on m.2 with Windows 10 and Windows 7.
     
Page 3 of 3