Public bug reported: Starting with Ubuntu's kernel 2.6.39-0.5, xrandr probing takes a couple of seconds with only one output connected (internal LCD of ThinkPad T510).
This probing also negatively influences lightdm (see bug 828112). Comment #11 in that bug report suggests to ignore HDMI outputs via xorg.conf, which actually restores the behavior of older kernels and running 'xrandr' becomes a lot faster (in my case it's sufficient to just ignore HDMI1). ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7 ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4 Uname: Linux 3.0.0-11-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu1 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: compiz Date: Wed Sep 21 00:19:18 2011 DistUpgraded: Fresh install DistroCodename: oneiric DistroVariant: ubuntu DkmsStatus: virtualbox, 4.1.2, 2.6.38-11-generic, x86_64: installed virtualbox, 4.1.2, 2.6.38-8-generic, x86_64: installed virtualbox, 4.1.2, 3.0.0-11-generic, x86_64: installed virtualbox, 4.1.2, 3.1.0-999-generic, x86_64: installed ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:21d9] InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110112) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 003: ID 046d:c048 Logitech, Inc. G9 Laser Mouse MachineType: LENOVO 4349WK7 PlymouthDebug: Error: [Errno 13] Permission denied: '/var/log/plymouth-debug.log' ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=755daaa3-ddf9-4451-ad6d-2b5354cee2c2 ro quiet splash elevator=deadline bootchart=disable vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/29/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6MET75WW (1.35 ) dmi.board.name: 4349WK7 dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6MET75WW(1.35):bd09/29/2010:svnLENOVO:pn4349WK7:pvrThinkPadT510:rvnLENOVO:rn4349WK7:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4349WK7 dmi.product.version: ThinkPad T510 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.5.94+bzr20110919-0ubuntu1~ppa1 version.ia32-libs: ia32-libs 20090808ubuntu22 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 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 oneiric running-unity ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/855133 Title: Xrandr probing slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/855133/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp