I recently got another MacBook Pro with broken discrete gpu. OSX doesn't boot at all anymore (garble and red stripes on screen), it's not covered by this apple-repair-action.
So I fixed it installing linux on it, just running on IGD.
Testing hibernate/resume, it worked but after n-times I got:
"memory size mismatch".
WHAT????
After some try and error, I can say this:
Booting on battery may give extra 4k free RAM !!!!
dmesg | grep totalpages:
powered: [ 0.000000] On node 0 totalpages: 1013414 battery: [ 0.000000] On node 0 totalpages: 1013415
I was not able to reproduce this with the other macbook .... until I did a SMC reset.
Another way to waste some RAM is using the alt-key-bootloader on startup ... and/or if there was a bootable usb-device plugged in.
Power management, mobile and firmware developer on Linux. Security developer at Aurora. Ex-biologist. mjg59 on Twitter. Content here should not be interpreted as the opinion of my employer. Also on Mastodon.
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The tale continues ....
Date: 2016-04-12 02:55 pm (UTC)So I fixed it installing linux on it, just running on IGD.
Testing hibernate/resume, it worked but after n-times I got:
"memory size mismatch".
WHAT????
After some try and error, I can say this:
Booting on battery may give extra 4k free RAM !!!!
dmesg | grep totalpages:
powered:
[ 0.000000] On node 0 totalpages: 1013414
battery:
[ 0.000000] On node 0 totalpages: 1013415
I was not able to reproduce this with the other macbook .... until I did a SMC reset.
Another way to waste some RAM is using the alt-key-bootloader on startup ... and/or if there was a bootable usb-device plugged in.