I recently came across an Apple 27" Cinema HD Display, which is 2560x1600 and connects through DVI. I have a fairly powerful gaming PC, GTX 770 graphics card, i5-6600k, SSD, and 16 GB RAM. I definitely have the hardware capable of driving this monitor.

When I boot up Windows, I can use this Apple monitor just fine. It works at its native 2560x1600 resolution and displays content at 60Hz and full color.

However, when I boot up my Xubuntu 18.04 Linux, any time I have this monitor plugged in, Xorg slows to a crawl and stays this way until I reboot. It's insanely slow, the mouse cursor freezes for seconds at a time, and applications take forever to load. Sometimes a severely distorted image of my first monitor appears on the screen, despite the display set to "extend". If I unplug the Apple monitor and reboot, then my OS works fine, but breaks again when I plug it back in.

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I'm able to press Ctrl+Alt+F1 and run htop to see Xorg flooring it at 100% CPU usage. Beyond observing the problem I have no idea what I could do to fix it.

I'm using the proprietary Nvidia drivers for my GTX 770 from the graphics-drivers 18.04 PPA.

  • Looks like a bug in the proprietary drivers, so complain to Nvidia? The drivers are closed source, so we can't know what goes wrong. You can look into /var/log/Xorg.0.log for any suspicious messages, though. – dirkt Dec 10 '18 at 8:00

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