[Bug 76490] Hang during boot when DPM is on (R9 270X)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76490

--- Comment #26 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to dex+fdobugzilla from comment #25)
> 
> Could this have something todo with the card having 4Gb of VRAM?

Doubtful.  More likely the card requires special some voltage tweaks for the
higher mclks.

Can you attach a copy of your vbios?

(as root)
(use lspci to get the bus id)
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom

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