what a7x described here:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/227520/comments/17
is pretty much my experience too.
I just tried jaunty alpha3 and it seems to bring some improvements. The
following command
xrandr --output VGA-0 --below LVDS --mode 1024x768
now achieves to set the external monitor resolution correctly. Unfortunately,
if I run afterwards just:
xrandr
the external monitor reverts to cloned mode and needs a VT switch to go back to
the correct configuration. Similarly as in Intrepid.
I repeat my `lspci -vvnn` here:
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon Mobility
X700 (PCIE) [1002:5653]
Subsystem: Acer Incorporated [ALI] Device [1025:0066]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M]
Region 1: I/O ports at 3000 [size=256]
Region 2: Memory at c8100000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at c8120000 [disabled] [size=128K]
Capabilities: <access denied>
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External monitor resolution can't be changed on laptop (ati driver)
https://bugs.launchpad.net/bugs/227520
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