2.6.37 dom0 kernel

[Marko Ristola]

Hi

I tried M A Young's precompiled 2.6.37 XEN kernel (under xen-4.0.1-6.fc14.x86_64, grub.conf modified.

I have a Radeon card.
I booted with and without modesetting, without success.
I booted successfully with Radeon driver without acceleration.
I'm sending this email from Dom0 :) Speed is as expected.

Here is the bug report:

Plain Radeon without any xorg.conf modifications on Fedora 14:
Initially there was a graphical modesetting based startup.
I switched from graphical startup progress graphics into text mode during boot: I could see textual progress messages during bootup.
When X tried to start, Radeon kernel driver caused a page fault, that it couldn't handle.
Full kernel stack trace was visible on the screen, and it could be looked up with Shift + page up / page down.
Unfortunately I don't have time to take a log via serial port this weekend.

With nomodeset, booting up progressed (disk IO heard), but the screen was blank all the time. I initiated a reboot from the keyboard.
With modesetting with the bug, keyboard didn't work. I initiated a reboot via reset button.

Here is the xorg.conf's part as a workaround for Radeon driver problem, /etc/xorg.conf.d/00-radeon.conf for Fedora 14:

Section "Device"

Identifier "UseRadeon"

Driver "radeon"
   Option "NoAccel" "true"
   Option "DRI" "false"
EndSection

Section "Monitor"

Identifier "MyMonitor"

Option "DPMS" "true"

EndSection

Section "Screen"

Identifier "MyScreen"

Device "UseRadeon"
   Monitor "MyMonitor"

EndSection

Regards,
Marko Ristola

[Boris Derzhavets]

> Here is the xorg.conf's part as a workaround for Radeon driver problem, 
> /etc/xorg.conf.d/00-radeon.conf for Fedora 14:

Yes, it works for me. Gnome login prompt comes up and Login provides
graphical environment for Xen Host with 2.6.37.1

Boris.

--- On Fri, 1/7/11, Marko Ristola  wrote:

From: Marko Ristola 
Subject: [Fedora-xen]  2.6.37 dom0 kernel
To: [e-mail]
Date: Friday, January 7, 2011, 4:21 PM

Hi

I tried M A Young's precompiled 2.6.37 XEN kernel (under xen-4.0.1-6.fc14.x86_64, grub.conf modified.

I have a Radeon card.
I booted with and without modesetting, without success.
I booted successfully with Radeon driver without acceleration.
I'm sending this email from Dom0 :) Speed is as expected.

Here is the bug report:

Plain Radeon without any xorg.conf modifications on Fedora 14:
Initially there was a graphical modesetting based startup.
I switched from graphical startup progress graphics into text mode during boot: I could see textual progress messages during bootup.
When X tried to start, Radeon kernel driver caused a page fault, that it couldn't handle.
Full kernel stack trace was visible on the screen, and it could be looked up with Shift + page up / page down.
Unfortunately I don't have time to take a log via serial port this weekend.

With nomodeset, booting up progressed (disk IO heard), but the screen was blank all the time. I initiated a reboot from the keyboard.
With modesetting with the bug, keyboard didn't work. I initiated a reboot via reset button.

Here is the xorg.conf's part as a workaround for Radeon driver problem, /etc/xorg.conf.d/00-radeon.conf for Fedora 14:

Section "Device"

Identifier "UseRadeon"

Driver "radeon"
   Option "NoAccel" "true"
   Option "DRI" "false"
EndSection

Section "Monitor"

Identifier "MyMonitor"

Option "DPMS" "true"

EndSection

Section "Screen"

Identifier "MyScreen"

Device "UseRadeon"
   Monitor "MyMonitor"

EndSection

Regards,
Marko Ristola

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xen mailing list
[e-mail]
https://admin.fedoraproject.org/mailman/listinfo/xen

[Pasi Kärkkäinen]

On Fri, Jan 07, 2011 at 11:21:44PM +0200, Marko Ristola wrote:
> Hi
>
> I tried M A Young's precompiled 2.6.37 XEN kernel (under xen-4.0.1-6.fc14.x86_64, grub.conf modified.
>
> I have a Radeon card.
> I booted with and without modesetting, without success.
> I booted successfully with Radeon driver without acceleration.
> I'm sending this email from Dom0 :) Speed is as expected.

Hello,

Are you aware that upstream Linux 2.6.37 doesn't have the 
xen (dom0) drm/ttm/kms fixes yet? They were just posted
to dri-devel and to lkml just a couples of days ago for review..

Konrad has a git tree with the patches applied, iirc ..
Also Jeremy's xen/stable-2.6.32.x git tree has (most) of the patches applied.

Also you might want to discuss these issues on xen-devel..
and report success/failures :)

Thanks!

-- Pasi
> Here is the bug report:
>
> Plain Radeon without any xorg.conf modifications on Fedora 14:
> Initially there was a graphical modesetting based startup.
> I switched from graphical startup progress graphics into text mode during boot: I could see textual progress messages during bootup.
> When X tried to start, Radeon kernel driver caused a page fault, that it couldn't handle.
> Full kernel stack trace was visible on the screen, and it could be looked up with Shift + page up / page down.
> Unfortunately I don't have time to take a log via serial port this weekend.
>
> With nomodeset, booting up progressed (disk IO heard), but the screen was blank all the time. I initiated a reboot from the keyboard.
> With modesetting with the bug, keyboard didn't work. I initiated a reboot via reset button.
>
> Here is the xorg.conf's part as a workaround for Radeon driver problem, /etc/xorg.conf.d/00-radeon.conf for Fedora 14:
>
> Section "Device"
>
> Identifier "UseRadeon"
>
> Driver "radeon"
>    Option "NoAccel" "true"
>    Option "DRI" "false"
> EndSection
>
> Section "Monitor"
>
> Identifier "MyMonitor"
>
> Option "DPMS" "true"
>
> EndSection
>
> Section "Screen"
>
> Identifier "MyScreen"
>
> Device "UseRadeon"
>    Monitor "MyMonitor"
>
> EndSection
>
> Regards,
> Marko Ristola
>
> --
> xen mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/xen

[M A Young]

On Fri, 7 Jan 2011, Marko Ristola wrote:
> I tried M A Young's precompiled 2.6.37 XEN kernel (under 
> xen-4.0.1-6.fc14.x86_64, grub.conf modified.

Try kernel-2.6.37-2.xendom0.fc15 available at 
http://koji.fedoraproject.org/koji/taskinfo?taskID=2711111 which has some 
extra DRM patches from Konrad's git repository.

Michael Young

[Marko Ristola]

I tested kernel-2.6.37-2.xendom0.fc15 with Fedora 14.

I figured out that i can create a crash with following grub.conf line:
    kernel /xen-4.0.1.gz dom0_mem=1024M
With the following line a crash won't occur:
    kernel /xen-4.0.1.gz

Without crash, most fonts are unreadable, cursor is just a box with random content.
Some fonts, åäöag worked allright, some fonts were unreadable. Some drop down menu thumbnails were ok,
others were garbage.

Both kernels appear equal with this grub.conf modification:
kernel-2.6.37-1.xendom0.fc15 and kernel-2.6.37-2.xendom0.fc15

Maybe Radeon won't get enough memory: allowing Dom0 kernel to use all almost 2GB memory works better.
Low memory causes the Radeon's generated page fault and the hang.

Marko Ristola

10.01.2011 02:34, M A Young wrote:
> On Fri, 7 Jan 2011, Marko Ristola wrote:
> > I tried M A Young's precompiled 2.6.37 XEN kernel (under xen-4.0.1-6.fc14.x86_64, grub.conf modified.
>
> Try kernel-2.6.37-2.xendom0.fc15 available at http://koji.fedoraproject.org/koji/taskinfo?taskID=2711111 which has some extra DRM patches from Konrad's git repository.
>
> Michael Young