Re: What is the purpose setting console=hvc0 in the dom0 grub config?

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On Wed, May 17, 2017 at 8:44 AM, George Dunlap <dunlapg@xxxxxxxxx> wrote:
On Wed, May 17, 2017 at 4:20 PM, Jerry <jerryubi@xxxxxxxxx> wrote:
> This is what's defined in /etc/default/grub following the install of the
> Xen:
> GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=1024M,max:1024M cpuinfo com1=115200,8n1
> console=com1,tty loglvl=all guest_loglvl=all"
> GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT="console=hvc0 earlyprintk=xen
> nomodeset"
> I didn't set these myself, this is what the xen package (or one of its
> dependencies) is doing.

It's the CentOS Xen package setting this.  But the Xen option
"console=com1,tty" should make it such that Xen sends its output
*both* to the serial line, *and* the monitor.

I take it you're not seeing any Xen output at all on your IPMI console?


The boot messages are suppressed, but if it boots successfully the login prompt shows up. If I remove console=hvc0 both the boot messages and login prompt show up.

Note: the IPMI console I'm looking at is just the local monitor being redirected.  It isn't a special device/driver.

I'll try what Konrad is suggesting, setting this:

console=hvc0 console=tty

And will see what happens.  It'll be a few hours until I can try it out.

Thank you to every one that has responded, I appreciate the help.

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