https://bugs.freedesktop.org/show_bug.cgi?id=75511

--- Comment #1 from Ilia Mirkin <imir...@alum.mit.edu> ---
Am I correct that you have 2 ~identical GK107 cards in there? Unfortunately it
appears that the VBIOS for the first one is corrupt. It's being retrieved from
PCIROM, which more often than not actually doesn't have what we want (despite
it passing the checksum). Note that your 2nd card appears to init correctly,
and it gets its VBIOS from the PROM. Not sure where the VBIOS for your first
card lives...

I assume that the VBIOS error about the unknown opcode exists in 3.12 as well?
Except that 3.13 made that an error. Who knows, maybe it's a legitimately
unknown opcode... could you grab a copy of envytools and retrieve the VBIOSes
for both of your cards with nvagetbios? i.e.

nvagetbios -c 0 -s PROM > vbios-0.rom
nvagetbios -c 1 -s PROM > vbios-1.rom

If the first one fails, also try PRAMIN instead of PROM (I assume -c 1 will
work just fine since nouveau is able to find it without problem). If that still
fails, try to get it from the pci rom directly:

echo 1 > /sys/bus/pci/devices/0000:01:00.0/rom
cat /sys/bus/pci/devices/0000:01:00.0/rom > vbios-0.rom
echo 0 > /sys/bus/pci/devices/0000:01:00.0/rom

(all of this as root, obviously.)

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