** Changed in: linux (Ubuntu Artful) Status: In Progress => Fix Committed
-- 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/1724911 Title: text VTs are unavailable on desktop after upgrade to Ubuntu 17.10 Status in linux package in Ubuntu: In Progress Status in linux source package in Artful: Fix Committed Bug description: == SRU Justification == After upgrading my laptop to Ubuntu 17.10, I am unable to access gettys on any of the text-mode VTs on my system. gdm3 is running on VT1, my user session is running on VT2. I can switch between these. If I switch to VT3, I know that the VT switch has happened in the kernel because the X cursor disappears; but the display retains the output of my X session, and the text console with getty never appears. Switching back to VT2 works fine. The same problem occurs with either Wayland or X. My laptop is docked with an external monitor, which could be a factor. (I also notice that during boot, plymouth is only rendered on the internal monitor, not the external monitor; this may be related). I have not yet tested whether this problem is reproducible if I undock. The system is booting with vt.handoff=7, which I believe is still the default in Ubuntu 17.10. This bug is a regression in Artful introduced by mainline commit: 7581d5ca2bb ("drm/i915/fbdev: Check for existence of ifbdev->vma before operations"). It was first found that this bug was fixed in v4.14-rc1. However, after a lengthy "Reverse" bisect, the exact commit could not be identified. This is because the fix came in via a merge base. A regular bisect was then done to identify commit 7581d5ca2bb as the offending commit that introduced the bug. Using the file that this commit touched, a "Reverse" bisect was done again between 7581d5ca2bb..v4.14-rc1. This identified the following commit 88be58be886f as the fix to this regression. == Fix == commit 88be58be886f1215cc73dc8c273c985eecd7385c Author: Daniel Vetter <daniel.vet...@ffwll.ch> Date: Thu Jul 6 15:00:19 2017 +0200 drm/i915/fbdev: Always forward hotplug events == Regression Potential == This patch fixes a current regression and is a minor one-liner. == Test Case == A test kernel was built with this patch and tested by the original bug reporter. The bug reporter states the test kernel resolved the bug. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-16-generic 4.13.0-16.19 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 NonfreeKernelModules: zfs zunicode zavl zcommon znvpair ApportVersion: 2.20.7-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: vorlon 24080 F.... pulseaudio /dev/snd/controlC0: vorlon 24080 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Thu Oct 19 09:57:59 2017 HibernationDevice: RESUME=UUID=6df76279-19ea-45a4-bec9-e4fdc858729a InstallationDate: Installed on 2010-09-24 (2582 days ago) InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1) MachineType: LENOVO 2306CTO ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-generic.efi.signed root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-16-generic N/A linux-backports-modules-4.13.0-16-generic N/A linux-firmware 1.169 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-10-19 (0 days ago) dmi.bios.date: 10/25/2013 dmi.bios.vendor: LENOVO dmi.bios.version: G2ET97WW (2.57 ) dmi.board.asset.tag: Not Available dmi.board.name: 2306CTO dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad X230 dmi.product.name: 2306CTO dmi.product.version: ThinkPad X230 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1724911/+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