Radeon X300 detect too many screens

[dvhart]

Binary package hint: xserver-xorg-video-ati

After the upgrade to Karmic from Jaunty, my Thinkpad Z60m can no longer use the external monitor connected via VGA. When I plug in the monitor and "Detect Monitors", the system detect 3 instead of 2. The laptop LVDS display is always there, but when I connect the VGA monitor, xrandr (and Display Preferences) detect the VGA monitor and a third display (DVI-0). It didn't do this in Jaunty. For some reason this prevents me from using the correct resolution on the external VGA display (1680x1050, the same as the laptop LVDS).

xrandr output with nothing connected:
$ xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1680
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1680x1050 60.1*+ 50.1
   1400x1050 60.0
   1280x1024 59.9
   1440x900 59.9
   1280x960 59.9
   1280x854 59.9
   1280x800 59.8
   1280x720 59.9
   1152x768 59.8
   1024x768 59.9
   800x600 59.9
   640x480 59.4
S-video disconnected (normal left inverted right x axis y axis)

xrandr with the external display attached via VGA:
$ xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1680
VGA-0 connected (normal left inverted right x axis y axis)
   1360x768 59.8
   1152x864 60.0
   1024x768 60.0
   800x600 60.3
   640x480 59.9
DVI-0 connected (normal left inverted right x axis y axis)
   1360x768 59.8
   1152x864 60.0
   1024x768 60.0
   800x600 60.3
   640x480 59.9
LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1680x1050 60.1*+ 50.1
   1400x1050 60.0
   1280x1024 59.9
   1440x900 59.9
   1280x960 59.9
   1280x854 59.9
   1280x800 59.8
   1280x720 59.9
   1152x768 59.8
   1024x768 59.9
   800x600 59.9
   640x480 59.4
S-video disconnected (normal left inverted right x axis y axis)

As you can see, it incorrectly detects a DVI-0 zero screen, and uses the same modes (max of 1360x768) for that and the VGA-0 display which should have 1680x1050 available.

I've tried using xrandr to only enable the VGA display, but have had no success.

I've tried the following in xorg.conf without success:
Section "Device"
 Identifier "Configured Video Device"
 Driver "radeon"
 Option "MonitorLayout" "LVDS,CRT"
EndSection

Is there a known work around to this? Or is there a bug in the radeon driver which is mis-detected a phantom display?

ProblemType: Bug
Architecture: i386
Date: Sat Jan 9 14:57:50 2010
DistroRelease: Ubuntu 9.10
MachineType: IBM 2529E8U
Package: xserver-xorg-video-ati 1:6.12.99+git20090929.7968e1fb-0ubuntu1
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=UUID=d3c4f978-8aa5-419e-a0e2-bc62dc4c790b ro quiet splash
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-386
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu10
 libgl1-mesa-glx 7.6.0-1ubuntu4
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel 2:2.9.0-1ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090929.7968e1fb-0ubuntu1
SourcePackage: xserver-xorg-video-ati
Uname: Linux 2.6.31-16-386 i686
dmi.bios.date: 12/20/2005
dmi.bios.vendor: IBM
dmi.bios.version: 77ET54WW (1.14 )
dmi.board.name: 2529E8U
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr77ET54WW(1.14):bd12/20/2005:svnIBM:pn2529E8U:pvrThinkPadZ60m:rvnIBM:rn2529E8U:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 2529E8U
dmi.product.version: ThinkPad Z60m
dmi.sys.vendor: IBM
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.31-16-386

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi dvhart,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect 505300

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug 505300 in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/505300

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

[Daniel Golle (daniel-golle)]

I can confirm that this bug is still present in natty. When connecting an external screen, this screen shows up twice, once as "Unknown" and once showing as the actual product name, making it impossible to enable it using xrandr or gnome-display-properties.

[penalvch (penalvch)]

dvhart, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p xserver-xorg-video-ati REPLACE-WITH-BUG-NUMBER

Please note, given that the information from the prior release is already available, doing this on a release prior to the development one would not be helpful.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

[dvhart (darren-dvhart)]

Thanks, but I no longer have the hardware.

[penalvch (penalvch)]

dvhart, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/505300/comments/6 regarding you no longer have the hardware. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.