Sebastien, I'm new to Ubuntu so I may not be looking in the right place... but I couldn't find much in the logs. There was no crash, no error, just... nothing. Only option was a forced power down. I could find the point where I restarted it in the logs, but nothing else seemed remarkable. And that is all gone now since I subsequently tried to reload Ubuntu last week, which hit the installer bug.n And at the moment, that machine is sidelined...
Right now, I'm using my backup laptop, which has also been running 20.04 for a couple months. I have grub set to quiet nosplash which seems to avoid it. I'm reluctant to try to reproduce this bug because these two machines both are mission critical. Plus: and this may be important... the backup is a ThinkPad T440s: immediately after this happened and forced a hard power down, I started to get ACPI errors every startup. We're not sure whether this event corrupted the ACPI table or whether it brought out a latent bug in the T440s BIOS. I have informed Lenovo. The other machine, the one that is sidelined, is a T570, dual boot with Win 10, Ubuntu freshly reloaded with much difficulty from the daily update copy due to bug 1871268. After getting past that installer crash issue, I was again confronted with initramfs errors (bug 1835660). Since we're not sure what this boot hang is doing to the BIOS, I turned off the splash screen hoping that I wouldn't see it. But that machine also continues to suspend on login, which seemed to be "the straw that broke the camel's back" and led me to reload Ubuntu in the first place: as it boots, as soon as you put in the login password, it suspends (bug 1897185). This combination of bugs got it unstable which is why I tried to reload Ubuntu late last week. Given all these errors, I can't really get you a "clean" test. But I can tell you that these four bugs seem to be inter-related. All this started with the second last Ubuntu Updater packet in mid- September, and got really bad with the last update packet which also included an update to the nVidia driver, which affects the T570 (the T440s is Intel graphics only). Both machines have Sierra Wireless WWAN, which does not seem to be involved. So this was all around the update to 20.04.1. Don't know if this helps but I hope so... -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1872159 Title: booting with splash hangs when external monitors are connected To manage notifications about this bug go to: https://bugs.launchpad.net/plymouth/+bug/1872159/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
