Tested bionic-proposed with both original VM that exhibited the problem on upgrade and a separate VM used to test the work-around (uncommenting WaylandEnable=false in /etc/gdm3/custom.conf).
Both VMs upgraded and ran successfully using https://wiki.ubuntu.com/Testing/EnableProposed. ----------------------------------------------------------------------------- # First test w/older VM that first exhibited the problem... # [ No network card present ] # Booted from old, saved VM where update first screwed up: $ uname -a Linux linuxTest 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux # Added bionic-proposed repository in update / developer options # [ Enabled network card for VM ] # Updated to current; restarted # Booted & logged in normally $ uname -a Linux linuxTest 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux # Yea! ----------------------------------------------------------------------------- # Second test with VM used for later testing of the problem... # [ No network card present ] # Re-tested with more recent problem VM... # Removed fix in /etc/gdm3/custom.conf (re-commented WaylandEnable=false) # Booted to watch login hang # {Shift} boot w/Grub in recovery mode to recovery mode menu; resumed startup. # Logged in (desktop @800x600); re-set desktop width $ uname -a Linux Linux linuxTest 4.15.0-52-generic #56-Ubuntu SMP Tue Jun 4 22:49:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux # Added bionic-proposed repository in update / developer options # [ Enabled network card for VM ] # Updated to current; restarted # Booted & logged in normally $ uname -a Linux linuxTest 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux # Yea! ----------------------------------------------------------------------------- -- 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/1832138 Title: Login screen never appears on vmwgfx using bionic kernel 4.15 Status in linux package in Ubuntu: Invalid Status in linux-hwe package in Ubuntu: Invalid Status in mutter package in Ubuntu: Invalid Status in linux source package in Bionic: Fix Committed Status in linux-hwe source package in Bionic: Fix Released Status in mutter source package in Bionic: Won't Fix Status in linux source package in Disco: Fix Released Status in linux-hwe source package in Disco: Invalid Status in mutter source package in Disco: Invalid Status in linux source package in Eoan: Invalid Status in linux-hwe source package in Eoan: Invalid Status in mutter source package in Eoan: Invalid Bug description: [Impact] With most recent version of mutter installed. If running kernel is in the 4.15 serie (using the vmwgfx video kernel driver) and if the login screen uses wayland, then the login prompt doesn't appears. All we see is the purple background with ubuntu in white at the bottom, nothing else. The vmwgfx driver in kernels prior to 4.17 reported bogus timestamps using the wrong clock. This would lead us to wait forever (or at least 49 years) before rendering the next frame. There's no decisive way to know this kernel bug is going to happen before it does so just detect timestamps which are obviously going to cause freezes and ignore them. [Test case] 1) Use Virtualbox or VMware ESxi (if you have the infra) 1.1) [virtualbox] Make sure in the VM setting that the display uses 'VMSVGA' which will force the OS to pick 'vmwgfx' video kernel driver. You can confirm with 'lspci -nnvv' command. 2) Deploy a VM with Ubuntu 18.04.1 (which come w/ 4.15) 4) apt-get dist-upgrade 5) Reboot with 4.15 it will fails with hwe kernel 4.18 it will work as expected. # workaround [Potential regression] Low, it should fix vmwgfx and stop using the wrong clock. A test kernel (pre-sru) has been made available to impact users for them to test and conclude it works. It does work as expected, and no regression has been found during the pre-sru testing phase. As per commit description: " This should be transparent to to user space, as long as it doesn't compare the time against the result of gettimeofday(). " [Other informations] upstream fix: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.2-rc5&id=37efe80ce85f [Original description] I'm running Ubuntu 18.04.2 desktop in a virtual machine under VMWare Fusion Pro V11.1.0 on MacOS Mojave 10.14.5, all on a 15inch 2018 Macbook Pro. I've been running this Ubuntu 18.04.2 VM without problem for many months without problem. Yesterday, I did 'sudo apt update; sudo apt upgrade'. Upon rebooting, the system hangs immediately after displaying the splash screen. I never see a login screen. And I can't use Ctrl+Alt+F2 to navigate to a console/tty login. I can SSH into the system however. I've found that I can work around the hang/freeze if I uncomment the following line in /etc/gdm3/custom.conf; #WaylandEnable=false After uncommenting the WaylandEnable=false line and rebooting, then I see the login prompt as expected and I can then log in and use the system normally again. After the 'apt upgrade' my system is running linux kernel 4.15.0-51, as shown in this 'uname -a' output; Linux ubuntuvm1 4.15.0-51-generic #55-Ubuntu SMP Wed May 15 14:27:21 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux lsb_release -a output; No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.2 LTS Release: 18.04 Codename: bionic ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7.1 ProcVersionSignature: Ubuntu 4.15.0-51.55-generic 4.15.18 Uname: Linux 4.15.0-51-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 CompositorRunning: None Date: Sun Jun 9 12:38:37 2019 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes GpuHangFrequency: This is the first time GraphicsCard: VMware SVGA II Adapter [15ad:0405] (prog-if 00 [VGA controller]) Subsystem: VMware SVGA II Adapter [15ad:0405] InstallationDate: Installed on 2018-05-06 (399 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: VMware, Inc. VMware Virtual Platform ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-51-generic root=/dev/mapper/ubuntu--vg-root ro splash net.ifnames=0 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/13/2018 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: 6.00 dmi.board.name: 440BX Desktop Reference Platform dmi.board.vendor: Intel Corporation dmi.board.version: None dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd04/13/2018:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A: dmi.product.name: VMware Virtual Platform dmi.product.version: None dmi.sys.vendor: VMware, Inc. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.95-1~18.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.04.2 version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.04.2 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1832138/+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
