So clearly 2012 rMBP users have a problem with automatic switching graphics on Yosemite. Do we know which kexts are necessary for this and maybe we could pull them from mavericks and install them until Apple fixes this themselves? Freezing constantly here, really NOT cool.
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Fixing the freezing on 2012 rMBP
- Thread starter bkribbs
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As you can read here: https://discussions.apple.com/thread/6602046
It's a much larger problem than those programs running, it is just graphics switching in general.
My 2012 is being replaced because of this. It's gotten to the point where my machine just freezes and cuts out at least twice per day, which makes it pretty much unusable.
I don't use gfxcardstatus or SMCfancontrol, and it happens on a clean install of Yosemite.
Out of interest, I see you also have the 2.7GHz model. Maybe it's just that CPU that's causing issues? Does anyone with the 2.3 or 2.6GHz machines have the same problem?
I don't use gfxcardstatus or SMCfancontrol, and it happens on a clean install of Yosemite.
Out of interest, I see you also have the 2.7GHz model. Maybe it's just that CPU that's causing issues? Does anyone with the 2.3 or 2.6GHz machines have the same problem?
My 2.6 GHz mid '12 got replaced because of the same issue. They had my Mac for 2 weeks at the Apple store and couldn't fix it, despite replacing almost every part inside.
That's strange. There must be something causing a specific subset of them to be going awry. If it was a driver issue, every 2012 one (or indeed, every Mac with graphics switching) would be experiencing it.
Mine had just come back from having a new logic board because of a GPU failure, ironically!
I stopped using Gfxstatus and everything is fine now. With graphic tools running it will freeze just by browsing certain websites.
It appears to just be driver related.
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I'll try turning it off but I don't imagine that will be the difference.
I have the 2012 2.7 as well. I've never experienced my machine freezing. At what point or what application(s) are running when it happens?
It can be absolutely anything. Sometimes safari, sometimes it'll do it with nothing running just sitting on the desktop. Running Photoshop is a pretty much guaranteed way to get it to freeze.
Sometimes I get a message about a graphics problem related to an "Intel GPU Hang", other times it just comes back on as normal - checking the console log shows 0 activity during the frozen time.
I really don't think it is. I went back to Mountain Lion (the OS that came with my Mac) and it still did it on a completely clean install.
I ran AHT and it found problems with the SSD. I rang AppleCare who asked me to take it into the Apple Store. They couldn't get it to boot to their internal network when booting using a Thunderbolt ethernet adaptor, so they diagnosed a logic board fault. Subsequent tests using ASD over an external HD, confirmed the logic board was at fault, specifically the GPU.
2 weeks later and despite replacing almost every part they could, it still wasn't fixed and they gave up trying to repair it and replaced the machine for me.
A lot of other people are having this problem, not just on Yosemite, but on Mavericks too.
I agree - if it was a general driver issue, there would be a much larger percentage of people experiencing issues.
Interestingly, mine failed their test on the GPU too. Maybe it's a batch of faulty chips?
There is a thread where there are a lot of people didn't have problems until Yosemite, I never had a freeze until the betas. I'm not convinced. I really like SMS relay but I may downgrade just to see.