kern/120262: 6.3-RELEASE i386; [drm] "0MB"; no dri with i915G [workaround]

[p9_gkvye]

[WORKAROUND]

I now have DRI.  I removed a 256-MB RAM module,
equalizing the RAM to 1 GB per channel, and the
machine now operates in dual-channel mode.  On boot,
[drm] still reports 0MB, but the i810 driver in xorg
sees the kernel reporting positive memory, and
I830CheckAvailableMemory finds almost 2GB available.

When I wrote that I was using the same hardware as
with 6.1 in 2006, I had forgotten about adding RAM in
the interim.  (I had not run 6.1 since the great xorg
upgrade last spring, and I skipped 6.2.)  At that time
I had a single 256-MB module operating in
single-channel mode -- apparently having the second
channel empty did not create the same problem I've had
recently.

It seems odd that the RAM would make a difference, but
I confirmed the workaround by re-installing the 256-MB
module, and again lost DRI; I removed it once more,
and DRI returned.

END




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