For bug https://bugs.freedesktop.org/show_bug.cgi?id=76990 I can't reproduce this on this system (with Switchable Graphics enabled or disabled), therefore I think this is not the case.
-- 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/1378744 Title: nVidia GK106GLM [Quadro K2100M] [10de:11fc] Connect to HDMI / DP port with open-source driver will cause Xorg crash Status in Accelerated Xorg driver for nVidia cards: Confirmed Status in linux package in Ubuntu: Confirmed Status in xserver-xorg-video-nouveau package in Ubuntu: New Bug description: CID: 201305-13527 Dell Precision M4800 Xorg would crash and restart (you will see the login screen again and again) when the HDMI / DP cable is connected to the system. Steps: 1. Install 14.04 + update (3.13.0-36), boot to desktop 2. Connect a HDMI / DP cable Expected result: * The external monitor should work Actual result: * The external monitor screen is black, and the Xorg crashed -> black screen on this laptop -> login screen shows up -> black screen... repeat. WORKAROUND: * Install the proprietary nvidia driver I'm not sure if this should be consider as a blocker. But hey, we need to certified this I+N system with the proprietary driver, I think it's OK to not to call this a blocker. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-36-generic 3.13.0-36.63 ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6 Uname: Linux 3.13.0-36-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 7071 F.... pulseaudio ubuntu 7529 F.... pulseaudio /dev/snd/controlC1: ubuntu 7071 F.... pulseaudio ubuntu 7529 F.... pulseaudio CRDA: country TW: (2402 - 2472 @ 40), (3, 27) (5270 - 5330 @ 40), (3, 17), DFS (5735 - 5815 @ 40), (3, 30) CurrentDesktop: Unity Date: Wed Oct 8 06:20:44 2014 HibernationDevice: RESUME=UUID=46ed949d-eff8-48e9-b337-6425f480cf12 InstallationDate: Installed on 2014-10-08 (0 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Dell Inc. Precision M4800 ProcFB: 0 inteldrmfb 1 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-36-generic.efi.signed root=UUID=e7f55d08-44a4-447e-8fc6-563864d60df4 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-36-generic N/A linux-backports-modules-3.13.0-36-generic N/A linux-firmware 1.127.7 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/02/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A06 dmi.board.name: 0FVDR2 dmi.board.vendor: Dell Inc. dmi.board.version: X02 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA06:bd01/02/2014:svnDellInc.:pnPrecisionM4800:pvr01:rvnDellInc.:rn0FVDR2:rvrX02:cvnDellInc.:ct9:cvr: dmi.product.name: Precision M4800 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/1378744/+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