[Bug 581466] Re: matroxfb causes corruption in both virtual consoles and xorg

[madbiologist]

Given that you get the same issue with kernel 2.6.34-rc7, I'm wondering
if some relevant DRM changes made their way into kernel 2.6.33, which
would then mean that they would have been backported to Lucid.  If this
is the case, then kernel 2.6.36-rc2 should help you.  From the
changelog:

commit c81476df1b4241aefba4ff83a7701b3a926bd7ce
Author: Ondrej Zary
Date:   Thu Aug 19 14:13:25 2010 -0700

    matroxfb: fix incorrect use of memcpy_toio()
    
    Screen is completely corrupted since 2.6.34.  Bisection revealed that it's
    caused by commit 6175ddf06b61720 ("x86: Clean up mem*io functions.").
    
    H.  Peter Anvin explained that memcpy_toio() does not copy data in 32bit
    chunks anymore on x86.
    
    Signed-off-by: Ondrej Zary
    Cc: Brian Gerst
    Cc: H. Peter Anvin
    Cc: Petr Vandrovec
    Cc: Jean Delvare
    Cc: <stable at kernel.org>		[2.6.34.x, 2.6.35.x]
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

A PPA of this kernel is available at http://kernel.ubuntu.com/~kernel-
ppa/mainline/

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matroxfb causes corruption in both virtual consoles and xorg
https://bugs.launchpad.net/bugs/581466
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