OK, I've worked around this in console-setup; I have an idea as to how
to implement setup-console-under-usplash while still avoiding this
problem. I do think it's a kernel bug that you can't reliably set the
font on another virtual console, though - and it's particularly
irritating that vgacon doesn't support more than one font at all, and
doesn't appear to store the font you give it anywhere other than in
video memory!

console-setup (1.13ubuntu5) feisty; urgency=low

  * Add a --save-only option to setupcon, to save the keyboard/font on the
    root filesystem but not actually tell the kernel to set it up.
  * Back out part of setup-console-under-usplash changes: attempts to change
    the font must be guarded against being run while on an X display or
    while usplash is running, because some kernel console drivers (at least
    vgacon) are fundamentally unable to change the font only on some virtual
    consoles, and will corrupt video memory if you try (LP: #73955). We now
    use setupcon --save-only to make sure the font is available on the root
    filesystem for the next boot but don't load it immediately.

 -- Colin Watson <[EMAIL PROTECTED]>  Mon, 15 Jan 2007 20:08:33 +0000

** Changed in: console-setup (Ubuntu)
       Status: Confirmed => Fix Released

-- 
Clobbered X screen state during installation
https://launchpad.net/bugs/73955

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