From the log file:
[ 0.331751] (II) RADEON(0): Output DVI-0 connected
[ 0.331771] (II) RADEON(0): Using exact sizes for initial modes
[ 0.331782] (EE) RADEON(0): Output DVI-0 enabled but has no modes
...
[ 0.332645] (EE) RADEON(0): No modes.
...
[ 0.332951] (EE) Screen(s) found, but none have a usable configuration.
Created an attachment (id=23531)
Xorg.0.log
Forwarded from Ubuntu bug https:/ /bugs.launchpad .net/bugs/ 335214
From the log file:
[ 0.331751] (II) RADEON(0): Output DVI-0 connected
[ 0.331771] (II) RADEON(0): Using exact sizes for initial modes
[ 0.331782] (EE) RADEON(0): Output DVI-0 enabled but has no modes
...
[ 0.332645] (EE) RADEON(0): No modes.
...
[ 0.332951] (EE) Screen(s) found, but none have a usable configuration.
lspci:
01:00.1 Display controller [0380]: ATI Technologies Inc RV570 [Radeon X1950 Pro] (secondary) [1002:72a0]
Subsystem: C.P. Technology Co. Ltd Device [148c:2205]
Graphics card : PowerColor X1950 Pro Game FX Board Series PCI-Express (256 MB DDR3)