Hi,

I've been running 
$ xrandr --output DVI-0 --rotate left --verbose
  crtc 0: disable
  screen 0: 768x1024 202x270 mm  96.09dpi
  crtc 0:     1024x768   75.1 +0+0 "DVI-0"

or 
$ xrandr -r 1

which renders my screen almost unusable (mouse cursor looks weird,
border of the screen or switching apps preview looks weird -a lot of
different, senseless colors).

I'm using ubuntu hardy on x86 with ati radeon driver installed

~$ sudo lspci -s 01:00 -v
01:00.0 VGA compatible controller: ATI Technologies Inc RV410 [Radeon X700 Pro 
(PCIE)] (prog-if 00 [VGA controller])
        Subsystem: Micro-Star International Co., Ltd. Unknown device 1780
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at c8000000 (64-bit, prefetchable) [size=128M]
        Memory at d0030000 (64-bit, non-prefetchable) [size=64K]
        I/O ports at c000 [size=256]
        [virtual] Expansion ROM at 50000000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] Express Endpoint IRQ 0
        Capabilities: [80] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-

01:00.1 Display controller: ATI Technologies Inc RV410 [Radeon X700 Pro (PCIE)] 
(Secondary)
        Subsystem: Micro-Star International Co., Ltd. Unknown device 1781
        Flags: fast devsel
        Memory at d0020000 (64-bit, non-prefetchable) [disabled] [size=64K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] Express Endpoint IRQ 0

-- 
rotation doesn't work with this board using Screen Resolution
https://bugs.launchpad.net/bugs/197680
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