<html><body><div style="font-family: Andale Mono; font-size: 12pt; color: #666666"><div>Yes I usually work headless, but I have been setting it up from new, so need to see what is going on.<br></div><div>Regards<br data-mce-bogus="1"></div><div>Francis<br data-mce-bogus="1"></div><div><br></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Scot P. Floess" <sfloess@nc.rr.com><br><b>To: </b>"Francis Greaves" <francis@choughs.net><br><b>Cc: </b>"centos-virt" <centos-virt@centos.org><br><b>Sent: </b>Monday, 22 February, 2016 17:02:12<br><b>Subject: </b>Re: [CentOS-virt] Garbled screen after RAM Scrub on boot<br></div><div><br></div><div data-marker="__QUOTED_TEXT__">When I was running Fedora 23 and using Xen (as the host OS), I saw <br>something similar on my Dell Precision 470. I don't recall seeing it now <br>with CentOS 7, but I tend to boot that machine headless more than not...<br><br>On Mon, 22 Feb 2016, Francis Greaves wrote:<br><br>> Dear All<br>> I am using Centos 7 with Xen 4.6 on a Dell Poweredge T430<br>> When the machine boots, after the 'Scrubbing Free RAM' message, I get a screen filled with little white squares until the login prompt, so I cannot see<br>> what is happening as the machine boots. Also there is nothing on the screen when I reboot.<br>> <br>> My /etc/default/grub is<br>> <br>> GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"<br>> GRUB_DEFAULT=saved<br>> GRUB_DISABLE_SUBMENU=true<br>> GRUB_CMDLINE_LINUX="crashkernel=auto rhgb intremap=no_x2apic_optout"<br>> GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=13312M,max:14336M dom0_max_vcpus=6 dom0_vcpus_pin"<br>> GRUB_GFXMODE=1024x768<br>> GRUB_GFXPAYLOAD_LINUX=keep<br>> GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT="console=hvc0 earlyprintk=xen nomodeset"<br>> <br>> I have tried setting (for a 1024x768 resolution) vga=792 in the GRUB_CMDLINE_LINUX and commenting out GRUB_GFXMODE and GRUB_GFXPAYLOAD_LINUX, but this<br>> makes no difference<br>> <br>> What am I doing wrong?<br>> <br>> Regards<br>> Francis<br>> <br>><br><br>Scot P. Floess RHCT (Certificate Number 605010084735240)<br>Chief Architect FlossWare http://sourceforge.net/projects/flossware<br> http://flossware.sourceforge.net<br> https://github.com/organizations/FlossWare<br></div></div></body></html>