GFXboot, Ubuntu and kvm git

GFXboot, Ubuntu and kvm git

[Soren Hansen]

[-- Attachment #1.1: Type: text/plain, Size: 687 bytes --]

Hi!

I'm having an issue with GFXboot in Ubuntu. If I try to boot one of our
recent iso images, e.g.

  http://cdimage.ubuntu.com/ubuntu-server/daily/current/hardy-server-amd64.iso

with a simple "kvm -cdrom hardy-server-amd64" using the kernel modules
from 2.6.24-rc6, and kvm-userspace from git, I just get a black screen.
If I add -std-vga to the command line, it works just fine. If I load the
kernel modules from git, it also works just fine.

I was under the impression that the kernel API should be backwards
compatible, so I consider this a bug. Is there anything I can do to help
debug this issue?

-- 
Soren Hansen
Ubuntu Server Team
http://www.ubuntu.com/

[-- Attachment #1.2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

[-- Attachment #2: Type: text/plain, Size: 228 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

[-- Attachment #3: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel

Re: GFXboot, Ubuntu and kvm git

[Dor Laor]

On Thu, 2008-01-17 at 18:20 +0100, Soren Hansen wrote:
> Hi!
> 
> I'm having an issue with GFXboot in Ubuntu. If I try to boot one of our
> recent iso images, e.g.
> 
>   http://cdimage.ubuntu.com/ubuntu-server/daily/current/hardy-server-amd64.iso
> 
> with a simple "kvm -cdrom hardy-server-amd64" using the kernel modules
> from 2.6.24-rc6, and kvm-userspace from git, I just get a black screen.
> If I add -std-vga to the command line, it works just fine. If I load the
> kernel modules from git, it also works just fine.
> 
> I was under the impression that the kernel API should be backwards
> compatible, so I consider this a bug. Is there anything I can do to help
> debug this issue?
> 

Indeed it's a bug and not different api.
It might be SVM fpu state leak. Bisecting the kernel can help.
Does it runs on Intel?
Dor


-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

Re: GFXboot, Ubuntu and kvm git

[Soren Hansen]

[-- Attachment #1.1: Type: text/plain, Size: 1005 bytes --]

On Fri, Jan 18, 2008 at 12:43:51AM +0200, Dor Laor wrote:
> > I'm having an issue with GFXboot in Ubuntu. If I try to boot one of
> > our recent iso images, e.g.
> > 
> >   http://cdimage.ubuntu.com/ubuntu-server/daily/current/hardy-server-amd64.iso
> > 
> > with a simple "kvm -cdrom hardy-server-amd64" using the kernel modules
> > from 2.6.24-rc6, and kvm-userspace from git, I just get a black screen.
> > If I add -std-vga to the command line, it works just fine. If I load the
> > kernel modules from git, it also works just fine.
> > 
> > I was under the impression that the kernel API should be backwards
> > compatible, so I consider this a bug. Is there anything I can do to help
> > debug this issue?
> Indeed it's a bug and not different api.  It might be SVM fpu state
> leak. Bisecting the kernel can help.  Does it runs on Intel?  Dor

Ah, sorry, I should of course have mentioned that I'm using kvm-intel.

-- 
Soren Hansen
Ubuntu Server Team
http://www.ubuntu.com/

[-- Attachment #1.2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

[-- Attachment #2: Type: text/plain, Size: 228 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

[-- Attachment #3: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel

Re: GFXboot, Ubuntu and kvm git

[Amit Shah]

On Friday 18 January 2008 04:13:51 Dor Laor wrote:
> On Thu, 2008-01-17 at 18:20 +0100, Soren Hansen wrote:
> > Hi!
> >
> > I'm having an issue with GFXboot in Ubuntu. If I try to boot one of our
> > recent iso images, e.g.
> >
> >  
> > http://cdimage.ubuntu.com/ubuntu-server/daily/current/hardy-server-amd64.
> >iso
> >
> > with a simple "kvm -cdrom hardy-server-amd64" using the kernel modules
> > from 2.6.24-rc6, and kvm-userspace from git, I just get a black screen.
> > If I add -std-vga to the command line, it works just fine. If I load the
> > kernel modules from git, it also works just fine.
> >
> > I was under the impression that the kernel API should be backwards
> > compatible, so I consider this a bug. Is there anything I can do to help
> > debug this issue?
>
> Indeed it's a bug and not different api.
> It might be SVM fpu state leak. Bisecting the kernel can help.

That's specific to the way Vista does things.

> Does it runs on Intel?
> Dor

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

Re: GFXboot, Ubuntu and kvm git

[Soren Hansen]

[-- Attachment #1.1: Type: text/plain, Size: 477 bytes --]

On Fri, Jan 18, 2008 at 12:43:51AM +0200, Dor Laor wrote:
> > I was under the impression that the kernel API should be backwards
> > compatible, so I consider this a bug. Is there anything I can do to
> > help debug this issue?

It's a bit odd. I was certain that I had had it running with the modules
from an older kernel version, but at least now I can't seem to find any
version that makes it work.


-- 
Soren Hansen
Ubuntu Server Team
http://www.ubuntu.com/

[-- Attachment #1.2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

[-- Attachment #2: Type: text/plain, Size: 228 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

[-- Attachment #3: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel

Re: GFXboot, Ubuntu and kvm git

[Amit Shah]

On Friday 18 January 2008 13:34:20 Soren Hansen wrote:
> On Fri, Jan 18, 2008 at 12:43:51AM +0200, Dor Laor wrote:
> > > I was under the impression that the kernel API should be backwards
> > > compatible, so I consider this a bug. Is there anything I can do to
> > > help debug this issue?
>
> It's a bit odd. I was certain that I had had it running with the modules
> from an older kernel version, but at least now I can't seem to find any
> version that makes it work.

You previously mentioned older modules didn't work, but modules from kvm-git 
worked. So now does even kvm-git not work? Is it the same kvm-git you tried 
earlier, or a new update?

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

Re: GFXboot, Ubuntu and kvm git

[Soren Hansen]

[-- Attachment #1.1: Type: text/plain, Size: 790 bytes --]

On Fri, Jan 18, 2008 at 02:38:03PM +0530, Amit Shah wrote:
>>>> I was under the impression that the kernel API should be backwards
>>>> compatible, so I consider this a bug. Is there anything I can do to
>>>> help debug this issue?
>> It's a bit odd. I was certain that I had had it running with the
>> modules from an older kernel version, but at least now I can't seem
>> to find any version that makes it work.
> You previously mentioned older modules didn't work, but modules from
> kvm-git worked. So now does even kvm-git not work?

kvm-git works just fine. I meant that I couldn't find any version
shipped with our kernel images that works as expected.

I'll try to be more clear in the future. Sorry :)

-- 
Soren Hansen
Ubuntu Server Team
http://www.ubuntu.com/

[-- Attachment #1.2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

[-- Attachment #2: Type: text/plain, Size: 228 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

[-- Attachment #3: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel

Re: GFXboot, Ubuntu and kvm git

[Amit Shah]

On Friday 18 January 2008 14:44:42 Soren Hansen wrote:
> On Fri, Jan 18, 2008 at 02:38:03PM +0530, Amit Shah wrote:
> >>>> I was under the impression that the kernel API should be backwards
> >>>> compatible, so I consider this a bug. Is there anything I can do to
> >>>> help debug this issue?
> >>
> >> It's a bit odd. I was certain that I had had it running with the
> >> modules from an older kernel version, but at least now I can't seem
> >> to find any version that makes it work.
> >
> > You previously mentioned older modules didn't work, but modules from
> > kvm-git worked. So now does even kvm-git not work?
>
> kvm-git works just fine. I meant that I couldn't find any version
> shipped with our kernel images that works as expected.

Hmm; does userspace from kvm-58 work fine with those modules? Any chance you 
could bisect userspace to find out which userspace make those modules work?

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/