[CentOS-virt] Garbled screen after RAM Scrub on boot
Scot P. Floess
sfloess at nc.rr.com
Mon Feb 22 18:06:18 UTC 2016
Francis,
I just rebooted my Precision 470 and watched...nothing :(
I see the boot menu, and then everything goes blank - as in just a
blinking cursor until I get the login prompt.
No idea what it's doing - but I don't even see the scrubbing free memory
output...
On Mon, 22 Feb 2016, Francis Greaves wrote:
> Yes I usually work headless, but I have been setting it up from new, so need to see what is going on.
> Regards
> Francis
>
>
> _________________________________________________________________________________________________________________________________________________________
> From: "Scot P. Floess" <sfloess at nc.rr.com>
> To: "Francis Greaves" <francis at choughs.net>
> Cc: "centos-virt" <centos-virt at centos.org>
> Sent: Monday, 22 February, 2016 17:02:12
> Subject: Re: [CentOS-virt] Garbled screen after RAM Scrub on boot
>
> When I was running Fedora 23 and using Xen (as the host OS), I saw
> something similar on my Dell Precision 470. I don't recall seeing it now
> with CentOS 7, but I tend to boot that machine headless more than not...
>
> On Mon, 22 Feb 2016, Francis Greaves wrote:
>
> > Dear All
> > I am using Centos 7 with Xen 4.6 on a Dell Poweredge T430
> > 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
> > what is happening as the machine boots. Also there is nothing on the screen when I reboot.
> >
> > My /etc/default/grub is
> >
> > GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
> > GRUB_DEFAULT=saved
> > GRUB_DISABLE_SUBMENU=true
> > GRUB_CMDLINE_LINUX="crashkernel=auto rhgb intremap=no_x2apic_optout"
> > GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=13312M,max:14336M dom0_max_vcpus=6 dom0_vcpus_pin"
> > GRUB_GFXMODE=1024x768
> > GRUB_GFXPAYLOAD_LINUX=keep
> > GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT="console=hvc0 earlyprintk=xen nomodeset"
> >
> > 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
> > makes no difference
> >
> > What am I doing wrong?
> >
> > Regards
> > Francis
> >
> >
>
> Scot P. Floess RHCT (Certificate Number 605010084735240)
> Chief Architect FlossWare http://sourceforge.net/projects/flossware
> http://flossware.sourceforge.net
> https://github.com/organizations/FlossWare
>
>
Scot P. Floess RHCT (Certificate Number 605010084735240)
Chief Architect FlossWare http://sourceforge.net/projects/flossware
http://flossware.sourceforge.net
https://github.com/organizations/FlossWare
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