Public bug reported: On a fresh install of 13.10, the second display fails to detect / initialise after X has started.
Installing a mainline kernel (It was an Intel drm-next nightly) resolved the issue, and the second display detects and is useable as expected. For interest that version was: 3.12.0-997.201310110505 ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-12-generic 3.11.0-12.19 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 Uname: Linux 3.11.0-12-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: davidb 2419 F.... pulseaudio Date: Wed Oct 23 14:14:54 2013 HibernationDevice: RESUME=UUID=e8c908c6-2d23-43cd-8052-b3c67ee7a8e8 InstallationDate: Installed on 2013-10-15 (8 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64+mac (20130925.1) MachineType: Apple Inc. Macmini6,1 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=0d06820d-d2f9-467d-a64b-4a43635411c3 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-12-generic N/A linux-backports-modules-3.11.0-12-generic N/A linux-firmware 1.116 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Apple Inc. dmi.bios.version: MM61.88Z.0106.B03.1211161202 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-031AEE4D24BFF0B1 dmi.board.vendor: Apple Inc. dmi.board.version: Macmini6,1 dmi.chassis.type: 16 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-031AEE4D24BFF0B1 dmi.modalias: dmi:bvnAppleInc.:bvrMM61.88Z.0106.B03.1211161202:bd11/16/2012:svnAppleInc.:pnMacmini6,1:pvr1.0:rvnAppleInc.:rnMac-031AEE4D24BFF0B1:rvrMacmini6,1:cvnAppleInc.:ct16:cvrMac-031AEE4D24BFF0B1: dmi.product.name: Macmini6,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug saucy -- 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/1243524 Title: Dual Display not working on Mac Mini Status in “linux” package in Ubuntu: Confirmed Bug description: On a fresh install of 13.10, the second display fails to detect / initialise after X has started. Installing a mainline kernel (It was an Intel drm-next nightly) resolved the issue, and the second display detects and is useable as expected. For interest that version was: 3.12.0-997.201310110505 ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-12-generic 3.11.0-12.19 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 Uname: Linux 3.11.0-12-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: davidb 2419 F.... pulseaudio Date: Wed Oct 23 14:14:54 2013 HibernationDevice: RESUME=UUID=e8c908c6-2d23-43cd-8052-b3c67ee7a8e8 InstallationDate: Installed on 2013-10-15 (8 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64+mac (20130925.1) MachineType: Apple Inc. Macmini6,1 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=0d06820d-d2f9-467d-a64b-4a43635411c3 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-12-generic N/A linux-backports-modules-3.11.0-12-generic N/A linux-firmware 1.116 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Apple Inc. dmi.bios.version: MM61.88Z.0106.B03.1211161202 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-031AEE4D24BFF0B1 dmi.board.vendor: Apple Inc. dmi.board.version: Macmini6,1 dmi.chassis.type: 16 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-031AEE4D24BFF0B1 dmi.modalias: dmi:bvnAppleInc.:bvrMM61.88Z.0106.B03.1211161202:bd11/16/2012:svnAppleInc.:pnMacmini6,1:pvr1.0:rvnAppleInc.:rnMac-031AEE4D24BFF0B1:rvrMacmini6,1:cvnAppleInc.:ct16:cvrMac-031AEE4D24BFF0B1: dmi.product.name: Macmini6,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243524/+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