Re: [Xen-devel] [Xen-users] Garbled screen after RAM Scrub on boot

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

Jan / Konrad,

Have you guys ever seen something like this before?  Any ideas how to proceed?

Thanks
 -George

On Tue, Feb 23, 2016 at 1:37 PM, Francis Greaves <francis@xxxxxxxxxxx> wrote:
> Dear All
> I am using Centos 7 with Xen 4.6 on a Dell Poweredge T430 with (from lspci)
> Matrox Electronics Systems Ltd. G200eR2 (rev 01) VGA
>
> 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 or shutdown.
>
> 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.
> I have also tried with no settings for vga at all, and with and without
> 'rhgb'
> I have even tried bootscrub=false as suggested by the CentOS-virt mailing
> list, but that does not work either. They suggested I asked you folk.
>
> What am I doing wrong?
>
> Regards
> Francis
>
>
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> http://lists.xen.org/xen-users

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