This is a mid-2011 17″ i7 MBP with 16GB and two 1TB SSDs - I had an exactly identical machine several years ago only one HDD. If I close the lid, eventually the external LED will go into light/dim cycle. But after the energy setting change, no more. One time, before changing the energy setting, I let it sit for 30 minutes, open and closed the lid and the screen came on. I think it fully boots because I can hear the email arrival tone now and then. Of course I’ll hear two chimes when doing one of the resets. I get the start up chime, screen stays blank. Clearing SMC/PRAM/NVRAM make no difference. Now when it boots I get a black screen no matter what. Doing all the resets worked… but it went blank and hasn’t come back when I turned off Automatic graphic switching in the Energy control panel. Hi, I started having problems again with getting a black screen at boot up. Nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefsĪdd a loginHook to load AMDRadeonX3000.kext after bootĬat > /Library/LoginHook/LoadDelayedAMDRadeonX3000kext.sh < Kudos and References This is the step that disables the Radeon as the bootup graphics card Mv /System/Library/Extensions/AMDRadeonX3000.kext/ $kextoffdir/ Moving the AMDRadeonX3000.kext out of extensions and updating the extensions cache Nb: csrutil disable only works in recovery mode * How to start in Single user mode? Cmd-S Second, after rebooting to a Single user mode commandline, with / partition mounted writeable, to do all the things that must be done with csrutil status= disabledĪfter that, rerun Recovery mode to run \`csrutil enable\` again. Loginhookscript="/Library/LoginHook/LoadDelayedAMDRadeonX3000kext.sh"Įcho "-įirst, from a Recovery Mode commandline to run csrutil disable. If you can get from there to a pendrive or a network drive, then you can copy the script. * You should still be able to use the Cmd-S, or Cmd-RS keypresses at boot to get to a command line. Recall that to run the script you must make it executable: chmod a x force-integrated-graphics.sh But how do I use this if I've already broken the graphics card? Optionally boot to recover mode again to re-able SIP. Boot to single user mode and run the scriptģ. Boot to recovery mode and run the scriptĢ. I wrote a script to reduce the steps to:ġ. The gain is that your MacBook 17" now works again, and runs slightly cooler/at lower power to boot. The loss is that you can no longer plug an external monitor in. And, to re-run that process after an O/S update has undone the changes. This script helps you to disable the card at boot, and force use of the Intel integrated graphics. Since the model also has built-in Intel graphics, the question arises, can I not carry on working with that? If you own one of the last generation of 17" MacBook Pros from 2011, and if you have worked with a large external monitor, you may reach the point of frying the Radeon graphics card.
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