Two displays, proper resolution cannot be set!

[spiral]

Freshly installed 11.10 x86, ATI, installed proprietary drivers. Two displays, one laptop with 1600x900 resolution, other viewsonic external monitor with 1366x768. What I wanted it to extend, so that my viewsonic is to the right.
1. I went to system/Display
2. Unchecked mirror
3. Set proper resolutions
4. Clicked on apply and than I got a popup message that something is wrong, and this could not be done because max is 1600x1600. Immediately it checks mirror, and sets my resolution to 1280x768 for both displays.
5. Ok, trying to find workarround. I unchecked mirror, set up resolution for both displays to 800x600 (since it told me max was 1600).
6. It works. I set up then resolutions to both displays to their max, and I got what can be seen on screenshot.

This did work in previous version, 11.04. Any workarround would be appreciated before bug fix is released.
Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
NonfreeKernelModules: fglrx
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu3
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,snap,resize,move,vpswitch,grid,place,mousepoll,regex,wall,imgpng,gnomecompat,animation,workarounds,unitymtgrabhandles,session,fade,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Fri Oct 14 00:52:46 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 5.100.82.38+bdcom, 3.0.0-12-generic, i686: installed
 fglrx, 8.881, 3.0.0-12-generic-pae, i686: installed
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 ATI Technologies Inc Manhattan [Mobility Radeon HD 5400 Series] [1002:68e0] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0457]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
JockeyStatus:
 xorg:fglrx_updates - ATI/AMD proprietary FGLRX graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
 kmod:wl - Broadcom STA wireless driver (Proprietary, Disabled, Not in use) [auto-install]
 xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
MachineType: Dell Inc. Inspiron N7010
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae root=UUID=7e943b4e-42b3-4b49-aad9-2e774c2181fa ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/31/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0PJTXT
dmi.board.vendor: Dell Inc.
dmi.board.version: A11
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A11
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd03/31/2011:svnDellInc.:pnInspironN7010:pvrA11:rvnDellInc.:rn0PJTXT:rvrA11:cvnDellInc.:ct8:cvrA11:
dmi.product.name: Inspiron N7010
dmi.product.version: A11
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
version.fglrx-installer: fglrx-installer N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Bryce Harrington (bryce)]

Sounds like perhaps the virtual buffer is not resizing after being set to 1600x1600, however this card's max texture buffer size is way larger than that so it's not a hardware limitation.

Try sticking this in your /etc/X11/xorg.conf, restarting X, and see if you can set it then:

Section "Device"
        Identifier "Configured Video Device"
EndSection

Section "Monitor"
        Identifier "Configured Monitor"
EndSection

Section "Screen"
        Identifier "Default Screen"
        Monitor "Configured Monitor"
        Device "Configured Video Device"

       SubSection "Display"
           Virtual 2966 1668
       EndSubSection
EndSection

[Bryce Harrington (bryce)]

We're closing this bug since there has not been a response from the original reporter. However, the issue still exists please feel free to reopen with the requested information. If you're not the original reporter, we'd prefer you file a new bug report.

Some tips:

  * Report X.org bugs via the command: `ubuntu-bug xorg`

  * Test against the latest development Ubuntu. http://cdimage.ubuntu.com/daily-live/
    Bugs marked as affecting the development version tend to get priority attention.

  * The `xdiagnose` utility has functionality for enabling debugging and
    analyzing a few common X problems.

  * Tag your bugs with the Ubuntu versions you have reproduced the issue in.

  * See https://wiki.ubuntu.com/X/Reporting for tips on writing good bug reports.