Let's wait for https://bugzilla.kernel.org/show_bug.cgi?id=59841 and see if it solves the problem.
** Bug watch added: Linux Kernel Bug Tracker #59841 http://bugzilla.kernel.org/show_bug.cgi?id=59841 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1211394 Title: ThinkPad X201 external screen might blank when connected over displayport. Status in “linux” package in Ubuntu: Confirmed Bug description: [ 28.560855] Pid: 1422, comm: modprobe Tainted: PF O 3.8.0-27-generic #40-Ubuntu [ 28.560855] Call Trace: [ 28.560861] [<ffffffff810587ef>] warn_slowpath_common+0x7f/0xc0 [ 28.560863] [<ffffffff810588ec>] warn_slowpath_fmt+0x4c/0x50 [ 28.560875] [<ffffffffa07bd182>] intel_wait_for_pipe_off+0xe2/0x1a0 [i915] [ 28.560886] [<ffffffffa07bd376>] intel_disable_pipe+0x136/0x170 [i915] I'm having this issue on both precise and raring on ThinkPad X201. This issue only appears when external display attached to DisplayPort. The behavior is consistent with stock/mainline kernel with stock or intel linuxgraphics drivers (3.8.0-26-generic, 3.8.0-27-generic, 3.8.0-27-generic with intel linux-graphics 2013Q2, 3.10.0-997-generic,3.10.0-997-generic with intel linux-graphics 2013Q2). External display works perfectly on VGA port. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: linux-image-3.8.0-27-generic 3.8.0-27.40 ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4 Uname: Linux 3.8.0-27-generic x86_64 NonfreeKernelModules: zfs zunicode zavl zcommon znvpair ApportVersion: 2.9.2-0ubuntu8.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: coyang 5192 F.... pulseaudio Date: Tue Aug 13 00:09:38 2013 HibernationDevice: RESUME=UUID=a5e3bbe9-32c8-45b5-bb80-7992a11ee933 InstallationDate: Installed on 2010-11-08 (1008 days ago) InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) MachineType: LENOVO 3680N48 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: boot=zfs bootfs=rpool/ROOT/raring clocksource=acpi_pm noapic usbcore.autosuspend=1 nmi_watchdog=0 processor.ignore_ppc=1 enable_mtrr_cleanup mtrr_spare_reg_nr=1 pciehp.pciehp_force=1 i915.semaphores=1 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.8.0-27-generic N/A linux-backports-modules-3.8.0-27-generic N/A linux-firmware 1.106 SourcePackage: linux UpgradeStatus: Upgraded to raring on 2011-10-10 (672 days ago) WifiSyslog: Aug 13 00:09:32 coyang kernel: [ 905.922614] type=1400 audit(1376323772.402:88): apparmor="ALLOWED" operation="open" parent=10533 profile="/opt/google/chrome/google-chrome//chrome_sandbox" name="/sys/devices/system/cpu/online" pid=10537 comm="nacl_helper_boo" requested_mask="r" denied_mask="r" fsuid=1001 ouid=0 Aug 13 00:14:41 coyang NetworkManager[3222]: <warn> nl_recvmsgs() error: (-33) Dump inconsistency detected, interrupted dmi.bios.date: 10/11/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 6QET70WW (1.40 ) dmi.board.name: 3680N48 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:bvr6QET70WW(1.40):bd10/11/2012:svnLENOVO:pn3680N48:pvrThinkPadX201:rvnLENOVO:rn3680N48:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 3680N48 dmi.product.version: ThinkPad X201 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1211394/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
