HD 630 color bug and no video accelleration

[Alex Fans]

I have partically video accel in os (smoother mouse movements), but windows collapsing are laggy.
In game fps normal and no lags.
And i have colors bug, like a sepia:

 

 

This effect with this parameters:
 

• AAPL,ig-platform-id : 00001259
• device-id : 12590000

Without device-id save result.

Used SMBIOS - iMac18,2 and iMac18,3
Yes, i tried iMac18,1, with it no video input.

OS seeing Monitor EDID and showing it info correctly.

 

Hadware:

• Motherboard: Acer H11H4-AI(KBL)

• CPU: i3-7100

• Graphics: HD 630

 

BIOS:

• VT - Enabled
• HyperThreading- Enabled
• Boot - UEFI
• SATA - ACHI
• DVMT: 64M
• CMS - Disabled
• SucureBoot - Disabled
• FastBoot - Disabled
• TPM (PTT) - Disabled (tried Enabled, not help)
• Serial-Port - Disabled
• XHCI-HandOff - missing option
• Above 4G Decoding - missing option
• CFG Lock - missing option

 

config.plist iMac.ioreg

Edited August 24, 2025 by Alex Fans

[strangeron]

Maybe CSM / Enable is required.

For HD630 try with NVRam Reset. (iMac19.1 ?)

<dict>
                <key>PciRoot(0x0)/Pci(0x2,0x0)</key>
                <dict>
                    <key>AAPL,ig-platform-id</key>
                    <data>AAAbWQ==</data>
                    <key>device-id</key>
                    <data>FlkAAA==</data>
                    <key>enable-hdmi20</key>
                    <data>AQAAAA==</data>
                    <key>framebuffer-con1-enable</key>
                    <integer>1</integer>
                    <key>framebuffer-con2-alldata</key>
                    <data>AQUKAAAIAACHAQAAAwYKAAAEAACHAQAA/wAAAAEAAAAgAAAA</data>
                    <key>framebuffer-con2-enable</key>
                    <data>AQAAAA==</data>
                    <key>framebuffer-patch-enable</key>
                    <integer>1</integer>
                    <key>framebuffer-stolenmem</key>
                    <data>AACQAA==</data>
                </dict>
            </dict>

[Alex Fans]

On 8/25/2025 at 2:49 AM, strangeron said:

Maybe CSM / Enable is required.

For HD630 try with NVRam Reset. (iMac19.1 ?)

<dict>
                <key>PciRoot(0x0)/Pci(0x2,0x0)</key>
                <dict>
                    <key>AAPL,ig-platform-id</key>
                    <data>AAAbWQ==</data>
                    <key>device-id</key>
                    <data>FlkAAA==</data>
                    <key>enable-hdmi20</key>
                    <data>AQAAAA==</data>
                    <key>framebuffer-con1-enable</key>
                    <integer>1</integer>
                    <key>framebuffer-con2-alldata</key>
                    <data>AQUKAAAIAACHAQAAAwYKAAAEAACHAQAA/wAAAAEAAAAgAAAA</data>
                    <key>framebuffer-con2-enable</key>
                    <data>AQAAAA==</data>
                    <key>framebuffer-patch-enable</key>
                    <integer>1</integer>
                    <key>framebuffer-stolenmem</key>
                    <data>AACQAA==</data>
                </dict>
            </dict>

 

Its not working for me, black screen.

 

 

On this forum found:

• SMBIOS: iMac18,1
• AAPL,ig-platform-id: 00001259
• Boot args: igfxagdc=0

The system works, but the behavior is strange.
For example, in Figma, Hearthstone, or Minecraft I see very high CPU usage while GPU usage stays low.
Surprisingly, on my old laptop with an i5-3337U and HD 4000 (with OCLP on Monterey), the same applications actually run with better performance.

Edited August 29, 2025 by Alex Fans

[Alex Fans]

Fixed.

 

Changed to SMBIOS: iMac19,1

and Just updated OS to: Sequoia 15.6.1

 

Now cpu load have normal values.