Lenovo ThinkBook 15p: unable to boot Monterey installer

[djuby]

Thanks Jake Lo. I get a kernel panic with this EFI (screenshot attached).

[djuby]

Marching on I was able to make some progress. Using those device properties:

AAPL,ig-platform-id = 0900A53E
device-id = 9B3E0000
framebuffer-patch-enable = 01000000
framebuffer-stolenmem = 00003001
framebuffer-fbmem = 00009000

 

I am able to boot without video - screen shows the boot text, but the system actually boots. I have sound when pressing vol+/- keys. I am also able to clean shutdown the system via keyboard shortcut. I guess this means that the those properties are OK, but the video out is not correct. What should I do next?

 

P.S. The system behaves the same without the device-id property too.

[Jake Lo]

post IOReg file

 

[djuby]

Here is the IOReg file.

IOReg.ioreg.zip

[Jake Lo]

check your BIOS. should have similar settings

Quote

 

-Under Config Tap

    Display

       Boot Display Device -> Thinkpad LCD

       Shared Display Priority -> USB Type-C

       Total Garphics Memory ->256MB

       Boot Time Extension -> Disabled

-Under Security Tap

    Memory Protection -> Execution Prevention -> On

    Secure Boot -> Secure Boot -> Off

                         -> Platform Mode -> UserMode

                         ->Secure Boot Mode -> Standard Mode

-Under Startup Tap

    UEFI/Legacy Boot ->UEFI Only

       CSM Support -> No

 

 

[djuby]

Not much choice in the BIOS. Lenovo has hidden all advanced settings

 

Here is a link to screenshots of the BIOS (file is bigger than the size allowed for upload here)

 

https://file.io/Fdx066lIOji6

[Jake Lo]

your IOReg file shows OLAR, MALD..etc. Which bootpack are you using?

 

[djuby]

I am using an Olarila vanilla Monterey image. Never had an issue with previous versions, but I can try something else. What would you suggest?

[djuby]

I have some progress. I was able to boot without -igfxvesa, but with no HW acceleration whatsoever. Here is my video patch. It only boots without flipping the hex for device-id. If I flip the digits as per WEG manual it boots without video signal on the laptop display.

 

Edit: Just realized that without proper device-id (i.e flipping the hex pairs) there is no way to get HW acceleration. Am I on the right track for at least a correct frame buffer?

 

[djuby]

Some progress update. With the following configuration I have some change in the video. I've made a video - https://file.io/bs4ZJkkWYDQ3

<key>PciRoot(0x0)/Pci(0x2,0x0)</key>
            <dict>
                <key>AAPL,ig-platform-id</key>
                <data>BgCbPg==</data>
                <key>disable-external-gpu</key>
                <data>AQAAAA==</data>
                <key>dpcd-max-link-rate</key>
                <data>FAAAAA==</data>
                <key>enable-dpcd-max-link-rate-fix</key>
                <data>AQAAAA==</data>
                <key>enable-hdmi-dividers-fix</key>
                <data>AQAAAA==</data>
                <key>framebuffer-patch-enable</key>
                <data>AQAAAA==</data>
                <key>framebuffer-fbmem</key>
                <data>AACQAA==</data>
                <key>framebuffer-stolenmem</key>
                <data>AAAwAQ==</data>
                <key>framebuffer-con0-enable</key>
                <data>AQAAAA==</data>
                <key>framebuffer-con0-type</key>
                <data>AgAAAA==</data>
                <key>framebuffer-con0-pipe</key>
                <data>CAAAAA==</data>
                <key>framebuffer-portcount</key>
                <data>AwAAAA==</data>
            </dict>