On Wed, May 17, 2017 at 08:37:13AM -0700, Jerry wrote: > On Wed, May 17, 2017 at 8:25 AM, Konrad Rzeszutek Wilk < > konrad.wilk@xxxxxxxxxx> 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. > > > > > > I'm still not clear on why hvc0 is needed, or why it's being set, but > > what > > > I do know for sure is it was causing the boot messages to be suppressed. > > > > So the hvc0 is to use the PV console driver to pipe all the messages to > > the Xen one. > > > > And Xen is configured to use the serial console (com1=115200,8n1). > > > > Which means that all you Linux bootup info should be piped to that. > > > > > So how would I properly configure it to still write to tty without > disabling hvc0? Perhaps something like this? > > GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT="console=hvc0,tty earlyprintk=xen > nomodeset" console=hvc0 console=tty And that should do it. > > Looks like I have some learning to do. Do you happen to know of a good > article explaining how console redirection works? You add the 'console' and it will pipe date to it. If you add more, then it will duplicate it to those. > > > > But Linux is pretty quiet unless you add 'loglevel=10' or 'debug' on the > > Linux command line. > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt@xxxxxxxxxx > https://lists.centos.org/mailman/listinfo/centos-virt _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos-virt
