I get this bug on two stable 8.10 installations which use the restricted
nVidia driver. They're both fine if you let them boot up in their
default resolution, the problem only occurs when I specify a "vga="
parameter for the kernel (0x305 and 0x307). It looks very much like
palette corruption, since the bitmap is the same, but the colours are
changed, and these are 8-bit palette-based modes. Specifying a non-
palette-based mode, like 1280x1024x32, is an effective work-around for
the issue (but causes some other problems on my machines which makes it
less than desirable).

If usplash expects a certain default VGA palette, then the problem may
be that the nvidia driver is corrupting it. Otherwise, if usplash loads
its own palette at shut-down time, perhaps the nvidia driver is somehow
preventing that from happening.

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usplash shutdown screen corrupt post nvidia restricted drivers installation
https://bugs.launchpad.net/bugs/127280
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