xorg.conf after installing xorg-driver-fglrx
It can be easily seen that the monitor has not been properly detected,
and maximum frequency was set at 60hz.
I restored the original file, modifing it as follows:
------------------------------
Section "Device"
Identifier "ATI Technologies Inc RV370 [Sapphire X550 Silent]"
Driver "ati"
BusID "PCI:1:0:0"
EndSection
------------------------------
changed to:
------------------------------
Section "Device"
Identifier "ATI Technologies Inc RV370 [Sapphire X550 Silent]"
Driver "fglrx"
BusID "PCI:1:0:0"
EndSection
------------------------------
Added the following block:
------------------------------
Section "Extensions"
Option "Composite" "0"
EndSection
------------------------------
Restarted X server and all went fine.
** Attachment added: "xorg.conf"
http://librarian.launchpad.net/6996131/xorg.conf%7E
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xorg / fglrx doesn't recognise monitor modes correctly
https://launchpad.net/bugs/22122
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