I found that you don't need uninstall fglrx (or nvidia, as that driver
will ship its own libGL as well) to use mesa libGL again - you can use
sudo update-alternative --set gl_conf /path/to/ld.so.conf
To see the available GL configurations, run
update-alternatives --list gl_conf
For example, if
Using a laptop with hybrid graphics (integrated intel dedicated amd
gpu), this bug hits me while running in integrated mode. I am using a
hybrid xorg.conf that uses either gpu if activated in bios. For me, the
fglrx driver is unfortunately required for proper load-dependent
(dynamic) frequency
Public bug reported:
If you setup a big desktop that spans two monitors, gnome-display-
properties is required to add a Virtual line to the subsection Display
in section screen of the xorg.conf as generated by aticonfig. If (at
least) the horizontal resolution (maybe the vertical as well) is NOT
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