You have been subscribed to a public bug: Binary package hint: gnome-control-center
Plugging in a new monitor and then attempting to open display properties or opening display properties, then plugging in a new monitor and clicking on the detect displays button results in a blank screen. kern.log then gets flooded with these messages [ 720.641063] INFO: task i915/1:695 blocked for more than 120 seconds. [ 720.641071] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.641077] i915/1 D c080b380 0 695 2 0x00000000 [ 720.641087] ef053f04 00000046 ef544000 c080b380 ef03da88 c080b380 59e794e9 00000046 [ 720.641102] c080b380 c080b380 ef03da88 c080b380 00000001 00000046 c080b380 ef598700 [ 720.641117] ef03d7f0 ef01b414 ef01b418 ffffffff ef053f30 c0569fb6 f705e480 ef01b41c [ 720.641131] Call Trace: [ 720.641147] [<c0569fb6>] __mutex_lock_slowpath+0xc6/0x130 [ 720.641156] [<c0569ed0>] mutex_lock+0x20/0x40 [ 720.641188] [<f859596a>] i915_gem_retire_work_handler+0x2a/0x70 [i915] [ 720.641211] [<c015313e>] run_workqueue+0x6e/0x140 [ 720.641236] [<f8595940>] ? i915_gem_retire_work_handler+0x0/0x70 [i915] [ 720.641249] [<c0153298>] worker_thread+0x88/0xe0 [ 720.641259] [<c0157940>] ? autoremove_wake_function+0x0/0x40 [ 720.641268] [<c0153210>] ? worker_thread+0x0/0xe0 [ 720.641274] [<c015764c>] kthread+0x7c/0x90 [ 720.641281] [<c01575d0>] ? kthread+0x0/0x90 [ 720.641289] [<c0103f17>] kernel_thread_helper+0x7/0x10 [ 720.641309] INFO: task Xorg:1010 blocked for more than 120 seconds. [ 720.641314] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.641319] Xorg D c080b380 0 1010 997 0x00400004 [ 720.641328] f4e07e20 00003082 c0138be1 c080b380 ef2fa848 c080b380 3dffe5de 00000046 [ 720.641342] c080b380 c080b380 ef2fa848 c080b380 3dff06e0 00000046 c080b380 ef7da540 [ 720.641356] ef2fa5b0 ef01b414 ef01b418 ffffffff f4e07e4c c0569fb6 f4e07ec0 ef01b41c [ 720.641370] Call Trace: [ 720.641377] [<c0138be1>] ? enqueue_task_fair+0x31/0x70 [ 720.641386] [<c0569fb6>] __mutex_lock_slowpath+0xc6/0x130 [ 720.641394] [<c0569ed0>] mutex_lock+0x20/0x40 [ 720.641418] [<f85967f6>] i915_gem_set_domain_ioctl+0x86/0x110 [i915] [ 720.641452] [<f847e6c0>] drm_ioctl+0x180/0x360 [drm] This repeats indefinitely. My best guess is that display properties is creating an incorrect display size after detecting the new monitor. In my case it is a 1280x800 14" laptop screen and 1680x1050 19" monitor. This is from Xorg.0.log (II) intel(0): Allocate new frame buffer 2960x1050 stride 4096 ProblemType: Bug Architecture: i386 CheckboxSubmission: 309c6e3872ffd0c083bbc91512e7100a CheckboxSystem: b845c366ea09c60efa3a45c1b5b21525 Date: Fri Sep 25 14:24:09 2009 DistroRelease: Ubuntu 9.10 Package: gnome-control-center 1:2.28.0-0ubuntu2 ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-10.35-generic SourcePackage: gnome-control-center Uname: Linux 2.6.31-10-generic i686 ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 -- Display properties hangs X when detecting monitors https://bugs.edge.launchpad.net/bugs/436902 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ 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