Razer Blade Stealth 13" 2019 UHD620 Can't get acceleration

[weby78]

Hello,

I am trying to enable Graphics acceleration on my iGPU (Intel UHD620) but I am unable to get it to work (Only showing 31mb of VRAM). I have been trying to get the framebuffer patches to work but unfortunately I have been unsuccesful, amy attempts with framebuffer patches either result in no backlight or a rainbow glitch at the bottom of the screen during boot causing a crash. If anyone has any experience with framebuffer patching I would greatly appreciate any assistance.

Thanks!

 

[littlegreen]

I'm not sure what the differences may be when you have a discrete GPU, but what I did was I found out how people are building their config.plists with hardware similar to mine. I happen to have a UHD620 with i5-8250U. Going to Catalina Laptop guides you can extract from any similar guide, but here's mine:

In ACPI:

    <dict>
                    <key>Find</key>
                    <data>R0ZYMA==</data>
                    <key>Replace</key>
                    <data>SUdQVQ==</data>
                    <key>Disabled</key>
                    <false/>
                    <key>Comment</key>
                    <string>change GFX0 to IGPU</string>
                </dict>

In Devices:

<key>FakeID</key>
        <dict>
            <key>#IntelGFX</key>
            <string>0x59168086</string>
            <key>#Kaby Lake-Comment</key>
            <string>To avoid automatic Clover fake device-id (Skylake) injection</string>
        </dict>

Properties: (Note that your PciRoot location will probably vary due to the descrete graphics)

<key>PciRoot(0x0)/Pci(0x2,0x0)</key>
            <dict>
                <key>AAPL,GfxYTile</key>
                <data>AQAAAA==</data>
                <key>framebuffer-stolenmem</key>
                <data>AAAwAQ==</data>
                <key>disable-external-gpu</key>
                <data>AQAAAA==</data>
                <key>device-id</key>
                <data>FlkAAA==</data>
                <key>framebuffer-fbmem</key>
                <data>AACQAA==</data>
                <key>device_type</key>
                <string>VGA compatible controller</string>
                <key>framebuffer-patch-enable</key>
                <data>AQAAAA==</data>
                <key>enable-hdmi20</key>
                <data>AQAAAA==</data>
                <key>AAPL,slot-name</key>
                <string>Internal@0,2,0</string>
                <key>framebuffer-con1-alldata</key>
                <data>AQUJAAAIAACHAQAA</data>
                <key>AAPL,ig-platform-id</key>
                <data>AAAWWQ==</data>
                <key>model</key>
                <string>Intel UHD Graphics 620</string>
                <key>framebuffer-con1-enable</key>
                <data>AQAAAA==</data>
                <key>framebuffer-unifiedmem</key>
                <data>AAAAgA==</data>
            </dict>

happy hacking!
littlegreen

 

[weby78]

I'm not sure what the differences may be when you have a discrete GPU, but what I did was I found out how people are building their config.plists with hardware similar to mine. I happen to have a UHD620 with i5-8250U. Going to Catalina Laptop guides you can extract from any similar guide, but here's mine:

In ACPI:

    <dict>
                    <key>Find</key>
                    <data>R0ZYMA==</data>
                    <key>Replace</key>
                    <data>SUdQVQ==</data>
                    <key>Disabled</key>
                    <false/>
                    <key>Comment</key>
                    <string>change GFX0 to IGPU</string>
                </dict>

In Devices:

<key>FakeID</key>
        <dict>
            <key>#IntelGFX</key>
            <string>0x59168086</string>
            <key>#Kaby Lake-Comment</key>
            <string>To avoid automatic Clover fake device-id (Skylake) injection</string>
        </dict>

Properties: (Note that your PciRoot location will probably vary due to the descrete graphics)

<key>PciRoot(0x0)/Pci(0x2,0x0)</key>
            <dict>
                <key>AAPL,GfxYTile</key>
                <data>AQAAAA==</data>
                <key>framebuffer-stolenmem</key>
                <data>AAAwAQ==</data>
                <key>disable-external-gpu</key>
                <data>AQAAAA==</data>
                <key>device-id</key>
                <data>FlkAAA==</data>
                <key>framebuffer-fbmem</key>
                <data>AACQAA==</data>
                <key>device_type</key>
                <string>VGA compatible controller</string>
                <key>framebuffer-patch-enable</key>
                <data>AQAAAA==</data>
                <key>enable-hdmi20</key>
                <data>AQAAAA==</data>
                <key>AAPL,slot-name</key>
                <string>Internal@0,2,0</string>
                <key>framebuffer-con1-alldata</key>
                <data>AQUJAAAIAACHAQAA</data>
                <key>AAPL,ig-platform-id</key>
                <data>AAAWWQ==</data>
                <key>model</key>
                <string>Intel UHD Graphics 620</string>
                <key>framebuffer-con1-enable</key>
                <data>AQAAAA==</data>
                <key>framebuffer-unifiedmem</key>
                <data>AAAAgA==</data>
            </dict>

happy hacking!
littlegreen

Thanks for the suggested config entries! When I try to replace my device property entries with the entries you suggested, during boot the displays backlight turns off and it appears to get stuck during the boot (something to do with the iGPU but I can't see as the backlight is off)

Do you have any ideas for any next steps to try?

Thanks!

 

[zappy39]

Thanks for the suggested config entries! When I try to replace my device property entries with the entries you suggested, during boot the displays backlight turns off and it appears to get stuck during the boot (something to do with the iGPU but I can't see as the backlight is off)

Do you have any ideas for any next steps to try?

Thanks!

Try with SSDT-PNLFCFL.aml and SSDT-ALS0.aml I had the same problem till I used these two amls