[coreboot] Question about Intel HD graphics and FLR

Joshua Pincus joshua.pincus at gmail.com
Wed Mar 29 22:49:37 CEST 2017


After performing just an FLR (PCI function level reset) of a Gen8 Intel HD
graphics device, there's no VGA output from the device, no matter what I
try to do.  I've had coreboot reset the graphics control register, VGA
control, VGA display disable bit, etc.

Has anyone seen anything like this?  The only way I can get VGA restored is
by performing a system-level reset.  But I just want to do an FLR.  Any

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