I'm doing a fresh installation on a Dell Latitude E6530, Core i5-3320M, 15.6" HD4000 1920x1080, 16GB RAM, 500GB SSD.
Not seeing any Sierra guides, I followed along with this El Capitan thread, using the E6430 bootpack as that seemed closest, and updating the VoodooPS2Keyboard.kext. All went well during the installation and first boot, but after I installed Clover to the SSD and rebooted, this was the result:
There is a larger and more readable version of this image.
This occurs whether I try booting from the hard drive or the USB install media.
It boots up in safe mode, but the video is so slow as to be nearly unusable.
I've tried a couple of things to try to isolate the problem:
I removed the generated ACPI/patched/ssdt.aml, which had no effect.
I tried to remove the Boot Graphics Glitch - 10.11 patch from config.plist. This allowed the system to boot, but the graphical glitches were there. It looked like sections of random snow all over the screen. I suspect that this patch needs to be updated for Sierra. (I then added it back in.)
At this point I am open to suggestions.