[Bug 91705] [NVE7] GPU crash (read fault) on boot w/ DMI+HDMI outputs

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=91705

--- Comment #8 from Zack Weinberg <zackw-VmQCmMdMyN0AvxtiuMwx3w@public.gmane.org> ---
Created attachment 117825
  --> https://bugs.freedesktop.org/attachment.cgi?id=117825&action=edit
vbios.rom

(In reply to Ilia Mirkin from comment #7)
> 
> No idea what we're (not) doing to make those mmio reads fail. As they're
> connected to "power", perhaps they're getting turned off for our
> convenience? Not sure.

Perhaps it *is* relevant, then, that when monitors are connected to VGA and
DVI, both are activated (in mirrored mode) by the BIOS, but when monitors are
connected to HDMI and DVI, *only* the HDMI-attached display is activated by the
BIOS.

> Perhaps it just doesn't have a SOR[3]/DAC[1]? Can you include your VBIOS,
> perhaps there's something interesting in there? From a successful boot, grab
> /sys/kernel/debug/dri/0/vbios.rom and upload it here.

Attached.

This computer is in my office, and I need to go home shortly, but I will be
able to do further experiments tomorrow morning.

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