I wouldn't normally opine into something like this, but on the off-
chance that it could be a possible cause:
Graphics Card: 01:05.0 VGA compatible controller: ATI Technologies Inc M880G
[Mobility Radeon HD 4200]
Computer: Compaq Presario CQ62
OS: Ubuntu 11.04 Beta 1 x86_64
I installed the FGLRX driver earlier today, and found it generally has issues
with more or less everything OpenGL, proceeded to remove it, looked a bit into
modprobe.d, and commented/removed two lines (one or both of which I may have
added myself when I first installed 10.10):
/etc/modprobe.d/blacklist.conf: "blacklist fglrx"
/etc/modprobe.d/blacklist-framebuffer.conf: "blacklist radeonfb"
I likewise modified xorg.conf to use fglrx, though this may have been
unnecessary:
Section "Screen"
Identifier "Default Screen"
DefaultDepth 24
EndSection
Section "Module"
Load "glx"
EndSection
Section "Device"
Identifier "Default Device"
Driver "fglrx"
EndSection
At any rate, its just a possible cause; I had also prior to the installation of
FGLRX had xorg-edgers installed (apt purged it before doing any of this,
though), and the machine itself was an upgrade over 10.10. Likewise, I have yet
to be able to run Unity for whatever reason [well, actually, the 11.04 upgrade
screwed up the /usr/bin/xsessions directory for some reason; prefer KDE anyway].
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https://bugs.launchpad.net/bugs/748137
Title:
unity rendering broken with fglrx (black masks)
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