Hi Will,

I basically used whatever was the HEAD revision of the Heads project at that 
time. That worked reasonably well, but a few issues remained:

-> A weird seemingly random data corruption issue when restoring backups [1], 
which I cannot reproduce any longer. I suspect either the VRAM change (see below) 
or the switch to the 4.19 kernel (see below) or maybe a combination of both fixed 

-> Distorted graphics (looked like random data in the video buffer) for the 
first 1-2 seconds when booting. This went away after setting 'gfx_uma_size=224M' 
in cmos.default and 'select USE_OPTION_TABLE' and 'select STATIC_OPTION_TABLE' in 
Kconfig. I use an external 4K screen and never checked if this is also an issue 
without it being connected. You might not need to do this.

-> Random freezes of the system ... this is clearly connected to the 5.4 kernel 
and never happens when using the 4.19 kernel. As long as the 4.19 kernel is 
supported I feel no pressure to do anything about it and hope that when the day 
comes, the newer kernel at that time will not have this issue anymore. There is 
some talk about this being connected to the i915 driver.

-> Some warnings about the CPU having issues when booting... that's a bug in 
Coreboot you can simply ignore. If you however want to fix it, just apply this fix 
[2] manually.

Good luck and let us know how it went!


[1] https://github.com/QubesOS/qubes-issues/issues/6227
[2] https://review.coreboot.org/28443

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