[DEV] kernel parameters "console=tty0 console=ttyS0" are not passed to the installed Ubuntu 16.04 LTS node

[immarvin]

From @ligc

I am trying the Ubuntu 16.04 pre-GA build with xCAT, and found that the kernel parameters "console=tty0 console=ttyS0" are not passed to the running system, I have to manually edit /etc/default/grub and add the kernel parameters to make the rcons work. You may want to add this into your TODO list for Ubuntu 16.04 support.

[whowutwut]

@pdlun92 FYI

[immarvin]

hi @whowutwut , is @pdlun92 looking into ubuntu 16.04 porting? if yes, you can assign the issue to him

[daniceexi]

@neo954 Please verify whether this is a valid bug for Ubuntu 16.04

[daniceexi]

@whowutwut You have done the ubuntu 16.04 installation, did the rcons work well? If kernel parameter console=xx has problem to be passed to kernel, the rcons won't work.

[neo954]

Working on it.

[neo954]

Played with Ubuntu 16.04 GA edition on a PowerNV 8335-GTA machine. The kernel command arguments console=tty0 console=ttyS0 was not passing to the kernel. But I got console=hvc0, which worked fine.

[daniceexi]

@immarvin Base on @neo954 's test against the GA version of Ubuntu16.04 that everything works fine. Could you confirm with @ligc that which platform he encountered this issue?

[ligc]

I am seeing this problem on x86 KVM guests, the PowerKVM guests seem ok.

[immarvin]

from @ligc , the provision message can be found on console , the reboot messages can not be seen on console

[immarvin]

The workaround is to add "console=tty0 console=ttyS0" into addkcmdline with

chdef <node> addkcmdline="R::console=tty0 R::console=ttyS0"

then run nodeset/rpower...

[daniceexi]

@immarvin Have you verified this workaround? Should it be tty0 or hvc0?

[daniceexi]

Even we had a workaround, will take a look this issue deeply in 2.12.1 to see possible fix.

[whowutwut]

👍

[immarvin]

fixed in #1455

[immarvin]

verified the fix on ubuntu 16.04 x86_64 kvm guest