Ubuntu 18.04.2 VMs can fail to boot on Citrix Hypervisor (formerly XenServer)
Article ID: CTX265663
Updated On:
Description
When creating an Ubuntu 18.04.2 or 18.04.3 VM or updating an existing VM to Ubuntu 18.04.2 or 18.04.3, your VM can fail to boot.
The console shows the boot sequence hung at the point "Starting Tool to automatically collect and submit kernel crash signatures..."
If you switch the console to shell mode and log in, the console shows errors in 'org.gnome.Shell.desktop'
Resolution
The following workarounds are available:
Add vga=normal fb=false to the kernel command line
- Run the following command in your VM's console: sudo vi /etc/default/grub
-
Add "
vga=normal fb=false" into GRUB_CMDLINE_LINUX_DEFAULT -
Run the command:
sudo update-grub -
Restart your VM.
or
Switch to using the standard stack (non-HWE)
1. Run the following commands in your VM's console:
sudo apt-get install linux-image-generic xserver-xorg
sudo apt-get remove linux-image-generic-hwe-18.04
sudo apt-get install --install-recommends xserver-xorg-video-all
2. Restart your VM.
Problem Cause
The Ubuntu Hardware Enablement (HWE) stack provides updated kernel and Xorg versions in later point releases of a particular version. The version of Xorg provided with Ubuntu 18.04.2 (1.20) contains a bug that can cause GDM to fail to start.
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