I tried a Lucid installation with monday's daily iso and almost the same device 
(One A115) and didn't experience your issue.
However I was able to reproduce it with adding video=viafb to the kernel boot 
line. It seems that the viafb somehow breaks the openchrome X driver…

You could try the following kernel boot options and report the results:
video=vesa vga=0x312

- video=vesa should avoid the viafb framebuffer driver being loaded, and 
openchrome selecting the wrong display for X;
- vga=0x312 will avoid the broken VTs/Plymouth if your device behaves like mine.

If you can confirm this works for you, the bug should be affected either
to xserver-xorg-video-openchrome which is the default X driver for this
device, or more likely to the linux-image-xxx package for wrongly
assuming that the viafb module would work with a VIA chip. :-)

-- 
Ubuntu 10.04 alpha 3 boot corrupts screen on VIA VX800 graphics (A110 netbook)
https://bugs.launchpad.net/bugs/538430
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