I recently tried switching from linux-2.6.23-gentoo-r9 to
linux-2.6.24-gentoo-r7. The latter is configured as
indentically as possible to the former, but when I run X under
the 2.6.24 kernel, one of my two displays blinks off every
10-20 seconds (it's off for about 1 second, then comes back
on).

The blinking doesn't happen with the 2.6.23 kernel.

The blinking doesn't happen in console mode.

I'm running nvidia-drivers 169.09-r1 with a NVIDIA GPU Quadro
NVS 290 (G86GL), connected via DVI to dual Samsung 204B
displays running at 1600x1200.

There's nothing in the system or X logs that conicides with the
blinking.

I'm a bit baffled as to how to troubleshoot the problem other
than stick with 2.6.23 and hope that a newer kernel rev fixes
things...

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