Problem with AMD FirePro v4900 after today's kernel update

[thomas cameron]

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Howdy -

I updated my desktop today, and got kernel-3.17.7-300.fc21.x86_64.
When I rebooted, my screens (three of them) were completely blank and
the monitors went into power saver mode. Text console was there when I
hit ctrl+alt+F2, but X was not there on console 1.

I booted into the older kernel, kernel-3.17.6-300.fc21.x86_64, and I
got a graphical login again. Anyone else seen this?

I am running three monitors, connected to a AMD FirePro v4900 - two
DisplayPort and one DVI, if that matters.

Thomas
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