WhateverGreen: force-online causes [AGDC] Failed with status -536870212 for stream access aux on 10.15+

[stevezhengshiqi]

macOS: Catalina & 11.0.1
UHD620 (0x59160000)

Hi guys, thank you again for all the great projects.

Since 10.15.4, we need force-online to drive HDMI displays, forcing online status on all displays. It works great on Catalina, but I got these warnings:

localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`IntelFBClientControl::doAttribute(unsigned int, unsigned long*, unsigned long, unsigned long*, unsigned long*, IOExternalMethodArguments*)> [IGFB][ERROR  ] [AGDC] Failed with status -536870212 for stream access aux
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`IntelFBClientControl::doAttribute(unsigned int, unsigned long*, unsigned long, unsigned long*, unsigned long*, IOExternalMethodArguments*)> [IGFB][ERROR  ] [AGDC] Failed with status -536870212 for stream access aux
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`IntelFBClientControl::doAttribute(unsigned int, unsigned long*, unsigned long, unsigned long*, unsigned long*, IOExternalMethodArguments*)> [IGFB][ERROR  ] [AGDC] Failed with status -536870212 for stream access aux
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`IntelFBClientControl::doAttribute(unsigned int, unsigned long*, unsigned long, unsigned long*, unsigned long*, IOExternalMethodArguments*)> [IGFB][ERROR  ] [AGDC] Failed with status -536870212 for stream access aux

The system would generate tons of these warnings no matter I plug in my HDMI display or not. Please have a check, and thanks a lot.

[dreamwhite]

UHD620 (0x59160000)

Excuse me sir, why are you using 0x59160000 framebuffer? What's your CPU model?

[stevezhengshiqi]

@dreamwhite it's Core i5-8250U, Kabylake-R. It's more like a Kabylake architecture instead of CoffeeLake.

[dreamwhite]

@dreamwhite it's Core i5-8250U, Kabylake-R. It's more like a Kabylake architecture instead of CoffeeLake.

Wait, as @dortania says, it's better using 0x8C700000 framebuffer which is basically a UHD617, more similar to UHD620, rather than HD 630 :P

[stevezhengshiqi]

@dreamwhite Using 0x8C700000 would break the backlight. Actually, UHD620 is widely used on 7, 8, 9 and 10th Gen laptops, but each generation has slight difference. For models >= CFL, they can use the 0x8C700000 + SSDT-PNLFCFL with no issue; but below CFL, we have to use 0x59xxxxxx id with SSDT-PNLF to make the backlight work. The _UID is different from KabyLake and CoffeeLake.

[dreamwhite]

@dreamwhite Using 0x8C700000 would break the backlight. Actually, UHD620 is widely used on 7, 8, 9 and 10th Gen laptops, but each generation has slight difference. For models >= CFL, they can use the 0x8C700000 + SSDT-PNLFCFL with no issue; but below CFL, we have to use 0x59xxxxxx id with SSDT-PNLF to make the backlight work. The _UID is different from KabyLake and CoffeeLake.

Well... I have ani5-8250U with 0x8C700000 and backlight works ^^

You can find my EFI here

[armenio]

Kabylake-R UHD620 device-id is 0x5917.
Also, look: #290

[stevezhengshiqi]

@dreamwhite Well, it different from case to case, and our discussion is not related to this issue. My problem is with force-online property (or igfxonln=1 and igfxonlnfbs=MASK), the system log would generate tons of warning like [AGDC] Failed with status -536870212 for stream access aux

[vit9696]

This is normal. It reports that the display is not connected for the remaining ports. You can always use force-online-framebuffers to report online status only on connected displays.

[stevezhengshiqi]

Just a follow-up, with force-online property, I have to replug my DP to lighten the external monitor. I need force-online because the monitor would dead after sleep on Big Sur. This is the framebuffer log I got when I plug in DP with no response on the monitor.

localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] FB1 port = 1 at 81016596
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] fb->fDPCDParams.SinkCount = 0
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] HPD is high
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Setting DP power OK, assuming DP connection
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #0
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #1
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #2
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #3
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #4
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #5
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #7
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #8
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #9
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #10
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #11
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #12
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #13
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #14
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #15
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #16
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #17
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #18
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 200 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Retry #19
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Reading sink count failed (0xe00002d6) for DP connection - assume that sink just went offline
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] isHPDLow = 1 emptyDongle = 0 sinkCount = 0 sinkCountChanged = 0
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 0 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 60 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::ReadAUX(AppleIntelFramebuffer*, unsigned int, unsigned short, void*, AppleIntelDisplayPath*)> [IGFB][ERROR  ] FB1: ReadAUX Timeout for addr 80 with Status = 0xe00002d6
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Event remove
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] FB1: Display unplugged from port1
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] Clear EDID cache flags flags=0
localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`AppleIntelFramebufferController::invokeHotplugHandler(unsigned int)> [IGFB][LOG  ][DISPLAY   ] [Hot_Plug] AGDC managing Display: Start listening to AGDC

And if I replugged my DP, the monitor can successfully work. When the display is not connected, I always get

localhost kernel[0]: (AppleIntelKBLGraphicsFramebuffer) <AppleIntelKBLGraphicsFramebuffer`IntelFBClientControl::doAttribute(unsigned int, unsigned long*, unsigned long, unsigned long*, unsigned long*, IOExternalMethodArguments*)> [IGFB][ERROR  ] [AGDC] Failed with status -536870212 for stream access aux

mentioned at the beginning of this issue.