NetBSD Problem Report #46634

From khorben@defora.org  Wed Jun 27 18:57:03 2012
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Date: Wed, 27 Jun 2012 19:40:41 +0200 (CEST)
From: Pierre Pronchery <pierre.pronchery@duekin.com>
Reply-To:
To: gnats-bugs@gnats.NetBSD.org
Subject: X does not work anymore with Xen (DOM0, amd64)
X-Send-Pr-Version: 3.95

>Number:         46634
>Category:       port-xen
>Synopsis:       X does not work anymore with Xen (DOM0, amd64)
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-xen-maintainer
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 27 19:00:00 +0000 2012
>Closed-Date:    Wed Sep 05 02:35:30 +0000 2012
>Last-Modified:  Wed Sep 05 02:35:30 +0000 2012
>Originator:     Pierre Pronchery <pierre.pronchery@duekin.com>
>Release:        NetBSD 6.0_BETA2
>Organization:
DUEKIN Consulting
>Environment:
System: NetBSD syn.defora.rom 6.0_BETA2 NetBSD 6.0_BETA2 (XEN3_DOM0) #6: Wed Jun 27 15:59:01 CEST 2012 khorben@kwarx.defora.lan:/home/amd64/obj/sys/arch/amd64/compile/XEN3_DOM0 amd64
Architecture: x86_64
Machine: amd64
>Description:
As observed by a few other users already (on port-xen@), Xorg no longer
works when running a NetBSD DOM0 kernel for Xen. The log shows this:

=== BEGIN PASTE ===
(II) RADEONHD(0): Getting BIOS copy from legacy VBIOS location
(EE) RADEONHD(0): Cannot allocate 0 bytes of memory for BIOS image
(EE) RADEONHD(0): Cannot allocate 0 bytes of memory for BIOS image
(II) RADEONHD(0): Query for AtomBIOS Init: failed
[...]
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found
=== END PASTE ===

The same happens with both the vesa and radeonhd drivers on this machine
(Lenovo ThinkPad T60 2007).

After reading the source code for xf86-video-vesa, xf86-video-radeonhd
and xorg-server, it seems that the Video BIOS is no longer available at
the expected address.

Dumping 64KB of memory at 0xc0000 results in all zeros, whereas I would
be expecting a copy of the Video BIOS to be found there (as confirmed
with a GENERIC kernel).

>How-To-Repeat:
Install, configure and attempt to run Xorg on NetBSD/amd64 with a
XEN3_DOM0 kernel.

>Fix:
Unknown.

>Release-Note:

>Audit-Trail:
From: "Cherry G. Mathew" <cherry@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/46634 CVS commit: src/sys/arch/amd64/amd64
Date: Mon, 3 Sep 2012 05:01:45 +0000

 Module Name:	src
 Committed By:	cherry
 Date:		Mon Sep  3 05:01:45 UTC 2012

 Modified Files:
 	src/sys/arch/amd64/amd64: machdep.c

 Log Message:
 Revert to unmanaged x86 memory mapped isa and pci space.
 This is a revert of commit r1.169:
 http://mail-index.netbsd.org/source-changes/2011/11/06/msg028702.html

 This should allow X to run on NetBSD/xen amd64 dom0, and fixes PR #46634


 To generate a diff of this commit:
 cvs rdiff -u -r1.189 -r1.190 src/sys/arch/amd64/amd64/machdep.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

From: "Jeff Rizzo" <riz@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/46634 CVS commit: [netbsd-6] src/sys/arch/amd64/amd64
Date: Mon, 3 Sep 2012 19:22:48 +0000

 Module Name:	src
 Committed By:	riz
 Date:		Mon Sep  3 19:22:47 UTC 2012

 Modified Files:
 	src/sys/arch/amd64/amd64 [netbsd-6]: machdep.c

 Log Message:
 Pull up following revision(s) (requested by cherry in ticket #539):
 	sys/arch/amd64/amd64/machdep.c: revision 1.190
 Revert to unmanaged x86 memory mapped isa and pci space.
 This is a revert of commit r1.169:
 http://mail-index.netbsd.org/source-changes/2011/11/06/msg028702.html
 This should allow X to run on NetBSD/xen amd64 dom0, and fixes PR #46634


 To generate a diff of this commit:
 cvs rdiff -u -r1.175.2.6 -r1.175.2.7 src/sys/arch/amd64/amd64/machdep.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

State-Changed-From-To: open->feedback
State-Changed-By: bouyer@NetBSD.org
State-Changed-When: Mon, 03 Sep 2012 20:17:33 +0000
State-Changed-Why:
Should be fixed in netbsd-6 now, can you confirm ?


State-Changed-From-To: feedback->closed
State-Changed-By: riz@NetBSD.org
State-Changed-When: Wed, 05 Sep 2012 02:35:30 +0000
State-Changed-Why:
submitter confirms it's fixed.


>Unformatted:

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