Secondly, Logic board replacement is an expensive affair! Last option, of course, is to get a new MPB, but I wanted to wait till the WWDC June 2018 announcement.Īnyways, I still wanted to make sure that this is indeed the same GPU problem that I was facing. ![]() It had all the possibilities of appearing once more (even after changed GPU). ![]() I thought, if I could get Logic board changed, I should be okay, but in many forums many users who got that done were not still immune from that problem. The machine is a 15″ MBP 10,1 (mid-2012) with dual GPU system. I missed the replacement program (as I was not even aware that it existed until I hit this problem) and now my machine is out of warranty (more than 51/2 years now). So, I started Googling for this GPU Panic problem and found that many laptops had this issue and that many forums said it was all due to a faulty discrete GPU on the logic board. Kernel Extensions in process name corresponding to current thread: kernel_task Panic(cpu 2 caller 0xffffff7f916c29cf): "GPU Panic: mux-regs 4 0 a0 99 0 8 severity 3 WS-ready 1 switch-state 3 IG FBs 1 EG FBs 0:0 power-state 3 3D idle HDA idle : AGC GPU REGISTER RESTORE FAILED : rdar://7254528, VendorID (CPU 2), Frame : Return Address Sometimes, upon restarting the first problem message that I got was GPU panic like the one shown below:Īnonymous UUID: 32BD6DA8-14C2-38AD-E466-F3B6DDCE6F7F But as soon as, I started using it, all of a sudden it would show a Black Screen, but CAPS LOCK would still glow green and so I would then reboot it again, only to Black screen. I got my MacBook cleaned and then it booted fine. I tried all that, but it refused to work. I started asking myself why would this happen? Was it due to upgrade to High Sierra 10.13.3 or was it that my machine really developed some hardware problem? I asked a friend of mine what can I do and he suggested SMC Reset followed by PRAM (NVRAM) Reset. After that, many times I would boot straight into Black Screen, and the only sign that the machine was awake could be just tested by pressing the CAPS LOCK key (turns on the button-light) or connecting an External USB with a indicator light. On the other hand if you want maximum performance all the time, then discrete only will make sure the most powerful GPU is fired up.įor most situations OS X does a decent job of managing power considerations, but if you want a little more control, gfxCardStatus will let you set up GPU power schemes to define which chip is used depending on power source.It all started when my MacBook Pro showed me black screen after waking from sleep. If you want to save as much battery power as possible, leaving it on integrated only will ensure that the power hungry discrete GPU doesn't fire up. A drop down menu provides you with three options: Integrated Only Discrete Only and Dynamic Switching, which is the system default that lets OS X decide which graphics card is required. Sitting up in your menu bar, gfxCardStatus shows you at a glance which card is currently active, but more than that, it actually allows you to manually switch between the GPUs. That's where gfxCardStatus comes to the rescue. It's often tricky to know which card is currently in use as the switch between the two is seamless. ![]() Some newer MacBook Pros have been packing dual graphics cards for a while now, with the ability to dynamically switch between them - integrated for battery life and discrete for performance.
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