[Bug 61457] [Intel G45] Screen turns blank when terminating a low res X server on a different low res KMS mode.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61457

--- Comment #13 from Egbert Eich <eich at pdx.freedesktop.org> ---
I've investigated this some more.
The issue seems to occur:
a. when a previous mode had the cursor plane enabled (Xserver).
b. when this or the previous mode was using self refresh.

The reason why a blank screen is not seen in the Xserver is that the Xserver
has the cursor plane enabled. Enabling the cursor plane on the console manually
by writing to the appropriate registers lets the screen light up.

Now I've got a slightly simpler workaround which has survived my tests.

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