GPU in question is Intel HD Graphics 5000 in a ThinkPad X1 Carbon Gen 2 with a native 1440p display.
Issue: MacOS will not display properly at 1440p and higher. The highest I can set the display is 2304x1296 LoDPI before the display starts glitching out and is unusable. HiDPI resolutions like 720p HiDPI render at 1440p internally and so don't work right either. Similar situation for 1080p HiDPI rendering at 4K internally, both glitch out. I can't also get 1440p HiDPI to work at all and I can't even force it by adding a fake resolution to the system picker using BetterDisplay.
This wouldn't be much of an issue if all the text wasn't blurry when using a LoDPI resolution.
I've tried using different platform ID's but the only one that seems to work is 0x0A260005. I've tried 0x0A260006 and 0x0D260007 but they either don't display at all or just break the existing working resolutions. I can however mirror the internal display over HDMI and it works perfectly there. All resolutions at any DPI work great on an external mirrored display.
If anyone could help me, or at the very least, point me in the right direction, I would be very happy. Thank you in advance! I'm open to any questions necessary to fix this problem
Guides I've checked out:
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