Matt Houghton wrote:That's strange. I use Photoshop a lot and that doesn't override gfxcard status at all.
It doesn't override gfxcard status, as such.
But it does something low level with the the driver, even with all the gfx card options in the Photoshop prefs off, that causes the machine to die, which is fixed when the card is removed. Either when you start Photoshop, or some random point when using it, the screen will go black and the machine needs to be restarted.
It is the *only* app that behaves this way when the card died (all the other apps avoided using the bad card fine when locked to the internal gfx)), and I spent a few months using a different app to Photoshop (remember, if my machine crashed, it would often take hours or reboots to finally get it to boot again, so it was imperative to keep it running while it was in that state) and rebuild my workflows with that, which was OK, but less than optimal.
Remember though that gfx chip failures are always different, and the effects and behaviours of hardware failures will manifest themselves in different ways - this is just the behaviour on my machine.
Matt Houghton wrote:Could you possibly point me to advice on the hacks you used to disable the Nvidia card?
Yes, this is the thread:
I don't know offhand how relevant it is for your specific card/machine, as this is for an AMD/2011 system, but it is working for a lot of people and the procedures are similar even if the hardware is different (this is the solution thread, there is another one trying to find solutions but that's a mess to wade through cold.)https://forums.macrumors.com/threads/disable-a-failed-amd-gpu-on-a-2011-macbook-pro-grub-solution.2087527/
The point of this procedure is the remove the dGPU from the system (it won't be shown in the system hardware profile) and not have the driver running at all. GFXcardstatus thus becomes irrelevant because the machine will only ever see the integrated gfx chip, the discrete one will be gone.
You can find *many* proposed solutions for this across the interwebs, but this one is the only proper one that properly works (like I say, I did a *deep* dive on this to try and find a solution. It's really not fun when your machine crashes, and you don't know how many days, if at all, it's going to take before the machine will boot again, when you have stuff to do...
(I am "mcbeej" on that thread, btw).
There is an additional (hardware) hack to remove the card from even powering up, but I didn't bother going that far. I will either replace the dGPU on this machine for £200-ish, or more likely, just get a s/h 2015 machine (although there are some compromises with this on internal storage as they only have one drive bay...)