Ubuntu – Dual monitor broken in Ubuntu 11.04

11.04atigraphicsmultiple-monitors

I upgraded from 10.10 to 11.04 and now my dual monitor support seems broken.
When booting, I see the screen duplicated just fine on both my laptop as my external monitor; after logging in, however, the external monitor disables and cannot be enabled.

Hardware:

  • Dell Studio XPS 1640 laptop
  • GFX: Ati Mobility Radion HD4670
  • Extenal monitor: Acer P193W

I get the following error message when applying screen settings:

The selected configruiation for
displays could not be applied
requested virtual size does not fit
available size: requested=(3040,900),
minimum=(320,00), maximum=(1600,1600)

lshw output:

  *-display
        description: VGA compatible controller
        product: ATI Technologies Inc
        vendor: ATI Technologies Inc
        physical id: 0
        bus info: pci@0000:01:00.0
        version: 00
        width: 32 bits
        clock: 33MHz
        capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
        configuration: driver=fglrx_pci latency=0
        resources: irq:50 memory:d0000000-dfffffff ioport:2000(size=256) memory:cfef0000-cfefffff memory:cfe00000-cfe1ffff

Screenshots:

Screen settings
Error message after clicking apply

Best Answer

You're able to resolve that issue by removing .config/monitors.xml. Steps are: 1.rm ~/.config/monitors.xml in terminal 2.log out and log in 3.call monitors utility and setup your 2 monitor configuration again.

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