Re: [Xen-users] Fedora 18 dom0, no video?

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On mar, 2013-06-18 at 20:24 -0400, Ray Barnes wrote:
> I'm not yet convinced that the Xen issue I just described is a problem
> with the box itself.  I have another F18 box with the Fedora Xen
> packages that works fine, including the video, it looks like this:
> 
Wait a minute... What you're saying is that this one configuration here
works:

> [root@reverse grub2]# rpm -q xen
> xen-4.2.1-10.fc18.x86_64
> 
> grub2 boot configuration:
> 
> menuentry 'Fedora, with Xen hypervisor' --class fedora --class
> gnu-linux --class gnu --class os --class xen $menuentry_id_option
> 'xen-gnulinux-simple-781b00e4-5f5b-43fe-ba20-545bed174aa2' {
>         insmod part_msdos
>         insmod ext2
>         set root='hd0,msdos2'
>         if [ x$feature_platform_search_hint = xy ]; then
>           search --no-floppy --fs-uuid --set=root
> --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2
> --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'
> 6243d00d-50ce-44fc-a0f3-49a843b64bbc
>         else
>           search --no-floppy --fs-uuid --set=root
> 6243d00d-50ce-44fc-a0f3-49a843b64bbc
>         fi
>         echo    'Loading Xen xen ...'
>         multiboot       /xen.gz placeholder
>         echo    'Loading Linux 3.8.7-201.fc18.x86_64 ...'
>         module  /vmlinuz-3.8.7-201.fc18.x86_64 placeholder
> root=/dev/sda5 ro rd.md=0 rd.lvm=0 rd.dm=0  rd.luks=0
> vconsole.keymap=us rhgb quiet
> 
> 
> 
While this other one below here doesn't:

> And on the new, problematic F18 box:
> 
> 
> [root@reverse ~]# rpm -q xen
> xen-4.2.2-6.fc18.x86_64
> 
> grub configuration:
> 
> 
> menuentry 'Fedora, with Xen hypervisor' --class fedora --class
> gnu-linux --class gnu --class os --class xen $menuentry_id_option
> 'xen-gnulinux-simple-a8ee5d7d-1603-4c37-86e4-93935105e229' {
>         insmod part_msdos
>         insmod ext2
>         set root='hd0,msdos2'
>         if [ x$feature_platform_search_hint = xy ]; then
>           search --no-floppy --fs-uuid --set=root
> --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2
> --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'
> 5e9b3ecc-1013-475e-9115-8869373c5f99
>         else
>           search --no-floppy --fs-uuid --set=root
> 5e9b3ecc-1013-475e-9115-8869373c5f99
>         fi
>         echo    'Loading Xen xen ...'
>         multiboot       /xen.gz placeholder
>         echo    'Loading Linux 3.9.5-201.fc18.x86_64 ...'
>         module  /vmlinuz-3.9.5-201.fc18.x86_64 placeholder
> root=UUID=a8ee5d7d-1603-4c37-86e4-93935105e229 ro rd.md=0 rd.lvm=0
> LANG=en_US.UTF-8 console=tty0
> KEYTABLE=us SYSFONT=True rd.luks=0 rd.dm=0
>         echo    'Loading initial ramdisk ...'
>         module  /initramfs-3.9.5-201.fc18.x86_64.img
> }
> 
Is that what you're saying? If yes, I'm really not sure of what could be
going on, and honestly, that'd be weird (the fact that the first config
works, I mean... for the reason, see below).

If it were the other way round (i.e., the *first* grub blurb you posted
was the *failing* one and the _second_ the _working_ one), then I'd ask
why the first is lacking an "module /initramfs-xxx" entry, is it perhaps
so?

If it is so, then try boot the problematic machine on baremetal (i.e.,
choise something different than '...with Xen...' in the grub menu),
rerun `grub2-mkconfig -o /boot/grub2/grub.cfg', and check the resulting
grub configuration file again. It now should have an "module
initramfs-xxx" entry, in which case you can try rebooting in Xen and
seeing what happens.

Allow me to add that, for specific issues about Xen on Fedora, you may
want to try asking in this ML as well:

 https://lists.fedoraproject.org/mailman/listinfo/xen

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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