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[Alexander Steffen <660901@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

I use a small script called by udev (as root user) whenever I place my laptop on the docking station or remove it again. This script uses xrandr to turn off the laptop display and switch on my primary monitor (or vice versa):
DISPLAY=:0.0 xrandr --output HDMI1 --auto
DISPLAY=:0.0 xrandr --output LVDS1 --off

It used to work fine in lucid, but in maverick both commands fail:
No protocol specified
Can't open display :0.0

I've discovered two possible workarounds:
- add XAUTHORITY=/var/run/gdm/auth-for-[...]/database to the commands
- call xhost +si:localuser:root on login (as default user)

At the moment, I use the second workaround as it is easier to implement.
I can't see any reason why root should have no access, after all root
has the power to take the required rights at any time. Therefore, I
suggest to give root access by default, so scripts like these run
without problems and this regression in comparison to lucid is fixed.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-22.34-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
Architecture: amd64
DRM.card0.DisplayPort.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.DisplayPort.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.HDMI_Type_A.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1920x1200 1600x1200 1280x1024 1280x1024 1152x864 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400
 edid-base64: AP///////wAQrBPQU0IxNSIRAQOAOiR47t5Qo1RMmyYPUFSlSwBxT4GAqUABAQEBAQEBAQEBKDyAoHCwI0AwIDYARmwhAAAaAAAA/wBSSjQ5MDc4TTUxQlMKAAAA/QA4TB5REQAKICAgICAgAAAA/ABERUxMIDI3MDdXRlAKACY=
DRM.card0.HDMI_Type_A.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: Off
 modes: 1366x768
 edid-base64:
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
Date: Fri Oct 15 03:11:56 2010
DkmsStatus:
 vhba, 20100822, 2.6.32-24-generic, x86_64: installed 
 vhba, 20100822, 2.6.32-25-generic, x86_64: installed 
 vhba, 20100822, 2.6.35-22-generic, x86_64: installed
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
MachineType: Sony Corporation VGN-TT11VN_X
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=/dev/mapper/ssd-root ro quiet splash
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
dmi.bios.date: 03/11/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: R2020M4
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnINSYDE:bvrR2020M4:bd03/11/2009:svnSonyCorporation:pnVGN-TT11VN_X:pvrJ0034ZNW:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VGN-TT11VN_X
dmi.product.version: J0034ZNW
dmi.sys.vendor: Sony Corporation
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       x86_64
 kernel:             2.6.35-22-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug maverick

-- 
udev scripts running as root cannot use xrandr
https://bugs.launchpad.net/bugs/660901
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