![]() ![]() ![]() ![]() Now power on again and hold Cmd+Opt+p+r at the same time until you hear the startup chime two times.īoot into Single User Recovery by holding Cmd+r+sĭisable dGPU on boot with setting the following variable: nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00Įnable verbose boot mode: nvram boot-args="-v" To start from a clean slate: reset SMC and NVRAM: shutdown, unplug everything except power, now hold leftShift+Ctrl+Opt+Power and release all at the same time Part 1: Disable SIP, disable dGPU, move one kernel extension Here are the steps (copied from linked page above): I fixed this issue by disabling the AMD graphics chip as described in the chosen solution (look for the green section) on this forum: ![]() Has anyone else experienced this issue? Any other possibilities I could look into? I'm assuming that a repair at the Apple Store will be prohibitively expensive. I have NOT tried hooking it up via dongle to an external display to see if the issue exists there as well, I'll try that this evening. It never restarted itself.Īt the moment I am pretty sure it's either an issue with the the display cable if I'm lucky, or the dedicated graphics adapter or the motherboard (Intel graphics are on-die on the processor) if I'm not. Instead, it booted, went bong, and then the screen went grey. Usually it boots, goes bong, reboots, and then loads. I've also tried resetting NVRAM, but it doesn't seem to work properly. I ran extended tests, and no problems were detected (yeah, right). The only thing I was able to get to run was internet based diagnostics. But in all cases, the screen goes grey when I try to select something. If I hold option, it will show me disk selection (I triple boot OS X/Linux/Windows). BIOS shows ok (except the overlayed green lines), and then a grey screen. The same thing happens if I try to launch recovery, internet recovery, or diagnostics whatever. This stays for a moment – until the loading scroll bar reaches about 1/3 to 1/2 of the way across – and then the screen goes grey. Turning it back on, the screen now had thin green lines overlayed over the apple logo boot screen. I open and closed the lid – it suspended just fine, but opening the lid back up gave me nothing. Last night I was using my late 2011 MBP (higher res screen, dual Intel/AMD graphics), and the screen suddenly went black. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |