Verification done for bionic:
bionic-updates:
- boots fine w/ console=ttyS0, can ssh in 10 seconds.
- boot fails w/ console=ttyS1, cannot SSH, qemu on 100% CPU (initramfs-tools
looping)
bionic-proposed:
- boots fine w/ console=ttyS0, can ssh in 10 seconds. (no regression)
- boots fine w/ console=ttyS1, can ssh in 10 seconds, qemu on low CPU% (issue
fixed)
details:
-------
$ lsb_release -cs
bionic
bionic-updates:
---
$ dpkg -s initramfs-tools | grep -i version:
Version: 0.130ubuntu3.10
console=ttyS0:
$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.15.0-99-generic
root=UUID=f513680e-7260-45e3-b4aa-89e4a210be77 ro console=ttyS0
console=ttyS1:
(cannot SSH into system. CPU% always high for QEMU.)
$ top -b -d1 | grep -e CPU -e qemu
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142522 libvirt+ 20 0 3745600 485332 23116 S 100.0 3.0 1:30.08
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142522 libvirt+ 20 0 3745600 485332 23116 S 99.0 3.0 1:31.08
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142522 libvirt+ 20 0 3745600 485332 23116 S 98.0 3.0 1:32.07
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142522 libvirt+ 20 0 3745600 485332 23116 S 99.0 3.0 1:33.07
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142522 libvirt+ 20 0 3745600 485332 23116 S 99.0 3.0 1:34.06
qemu-system-x86
^C
bionic-proposed:
---
$ dpkg -s initramfs-tools | grep -i version:
Version: 0.130ubuntu3.11
console=ttyS0:
$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.15.0-99-generic
root=UUID=f513680e-7260-45e3-b4aa-89e4a210be77 ro console=ttyS0
console=ttyS1:
(can SSH into system. CPU% low for QEMU)
$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.15.0-99-generic
root=UUID=f513680e-7260-45e3-b4aa-89e4a210be77 ro console=ttyS1
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142731 libvirt+ 20 0 3656512 602160 22816 S 83.2 3.7 0:38.73
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142731 libvirt+ 20 0 3656512 602160 22816 S 29.7 3.7 0:39.03
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142731 libvirt+ 20 0 3656512 602160 22816 S 1.0 3.7 0:39.04
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142731 libvirt+ 20 0 3656512 602160 22816 S 2.0 3.7 0:39.06
qemu-system-x86
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
142731 libvirt+ 20 0 3656512 602160 22816 S 2.9 3.7 0:39.09
qemu-system-x86
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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https://bugs.launchpad.net/bugs/1879987
Title:
machine get stuck at boot if specified 'console=ttyS* ' doesn't exist.
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https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1879987/+subscriptions
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