I figured out the problem. In 2.4.0-test13-pre3 is the introduction of
the shmall sysctl. I had installed a package called powertweak a while
back. It looks like powertweak sets any sysctl it doesn't know to 0.
So, the problem was that there was no shared memory for X. ;(
I set that up to a reasonable level and all is well.
sorry for the wild goose chase. :(
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