[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
Related public bugs found here and there: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960355 https://github.com/systemd/systemd/issues/15783 https://github.com/systemd/systemd/issues/15656 ** Bug watch added: Debian Bug tracker #960355 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960355 ** Bug watch added: github.com/systemd/systemd/issues #15783 https://github.com/systemd/systemd/issues/15783 ** Bug watch added: github.com/systemd/systemd/issues #15656 https://github.com/systemd/systemd/issues/15656 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
I observed the random kernel spew on my reproducer but I also want to add that it was also noticed on my VMware impacted contact who brought this up to my attention at the first place. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
I don't know yet if related, but I also observed the following: syslog:May 21 17:25:27 ubuntu kernel: [0.00] random: get_random_bytes called from start_kernel+0x99/0x4fd with crng_init=0 syslog:May 21 17:25:27 ubuntu kernel: [1.902484] random: lvm: uninitialized urandom read (4 bytes read) Could the missing ttyS* have an effect on entropy ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
from dmesg (took from virsh dump) [0.00] Command line: BOOT_IMAGE=/vmlinuz-4.15.0-101-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro console=ttyS4 .. [1.053683] Warning: unable to open an initial console. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
** Attachment added: "console_issue.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+attachment/5375272/+files/console_issue.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
** Changed in: linux (Ubuntu) Importance: Medium => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
** Description changed: kernel get stucks at boot if console=ttyS* is specified in the kernel cmdline and that serial HW isn't available on the system. Reproduced with: 4.4 (from Xenial), 4.15 (from Bionic), 5.4 (native, Focal) and 5.7-next (mainline) - Removing the non-existent 'console=ttyS*' fixes the situation. + Removing the non-existent 'console=ttyS*' parameter fixes the situation. I tested it using KVM/qemu, but it has been brought to my attention that it was reproducible in VMware as well. I think it is safe to say that it is unlikely to be specifics to a certain virtualization technology type. Didn't test on baremetal, but I would suspect the same behaviour (until I'm proving wrong). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
I've managed to reproduce in 4.4, 4.15, 5.4 (all from Ubuntu releases) and 5.7-rc4-next; also, I think bare-metal usually doesn't reproduce. Seems like a live-lock situation, I'll attach some calltraces I gathered using sysrqs. Cheers, Guilherme -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli) ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879987] Re: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.
** Description changed: kernel get stucks at boot if console=ttyS* is specified in the kernel cmdline and that serial HW isn't available on the system. Reproduced with: 4.4 (from Xenial), 4.15 (from Bionic), 5.4 (native, Focal) and 5.7-next (mainline) Removing the non-existent 'console=ttyS*' parameter fixes the situation. I tested it using KVM/qemu, but it has been brought to my attention that it was reproducible in VMware as well. I think it is safe to say that it is unlikely to be specifics to a certain virtualization technology type. - Didn't test on baremetal, but I would suspect the same behaviour (until - I'm proving wrong). + Didn't test on baremetal yet. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879987 Title: kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
