Note: Remember to have your laptop plugged into AC anytime you connect to an external display and turn your power settings to Never under AC as well. Now you can restart your machine normally and it should all work for you. Ive never seen a monitor go bad and not Answer (1 of 11): It may be DOA. Press Power + Shift at the same time, which should start you off in Safe Mode and you should see your external display come on also.Ĥ. Ive checked in the bios to see if the mobo is recognizing the GPU and it is. Shut down your laptop, make sure it's pugged into A/C and your external monitor is connected. There should be a rapidly increasing number of interrupts registered, and one of your cores should be pegged at 100. To verify that this is required, check cat /sys/firmware/acpi/interrupts/gpe06. You should hear the Apple chime twice and then you can let go.ģ. Due to this bug, it may be necessary to disable GPE06 by adding acpimaskgpe0x06 as a kernel boot parameter. Still holding these down when you see the Apple logo appear, press down P. Laptop should still be off, then hit Command + Option + R + Power. Turn off your laptop, hold Shift + Control + Option and then Power (Note: it doesn't look like anything is happening but it is, ie.) you won't see anything and Mac will not start)Ģ. Your MacBook will get confused when this happens and it saves this in cache, so you've got to clear it like this.ġ. My laptop worked when I initially plugged it into the LCD in my hotel room, but then I forgot it on battery and it went to sleep, to never work again until now.
MACBOOK AIR NOT DETECTING EXTERNAL DISPLAY GFXCARDSTATUS HOW TO
I was in Malaysia when I encountered this problem with my brand new MacBook Pro 13", but didn't have the luxury of going to my local Apple Outlet to fix it, so I stayed up late to call the US and figure out how to fix it.
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