NetBSD Problem Report #47669
From khorben@defora.org Tue Mar 19 16:25:36 2013
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Date: Tue, 19 Mar 2013 17:22:43 +0100 (CET)
From: Pierre Pronchery <khorben@defora.org>
To: gnats-bugs@gnats.NetBSD.org
Subject: X fails to start on Xen DOM0 (amd64)
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>Number: 47669
>Category: port-xen
>Synopsis: X fails to find the video RAM when running on an amd64 DOM0
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: port-xen-maintainer
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Mar 19 16:30:00 +0000 2013
>Last-Modified: Tue Mar 19 20:50:04 +0000 2013
>Originator: Pierre Pronchery
>Release: NetBSD 6.1_RC2
>Organization:
>Environment:
NetBSD 6.1_RC2 (XEN3_DOM0) #6: Sun Mar 17 23:54:06 CET 2013 khorben@kwarx.defora.lan:/home/amd64/obj.6/sys/arch/amd64/compile/XEN3_DOM0 amd64
Architecture: x86_64
Machine: amd64
>Description:
When starting modular Xorg on a 6.1_RC2 amd64 DOM0, it fails with the
following message:
(EE) RADEONHD(0): No Video RAM detected.
I haven't experienced this on earlier versions of the netbsd-6 branch;
however, I have recently raised the amount of RAM allocated to the DOM0
from 2048 to 4096MB, and I suspect this might well be related.
I can test with a lower amount when I get physical access to this
computer again, probably this evening.
This might be helpful:
modular-xorg-server-1.6.5nb14 Modular X11 server from modular X.org
modular-xorg-drivers-1.4 Modular Xorg driver meta-package
xf86-video-radeonhd-1.3.0nb2 Modular X.org driver for Radeon HD series
The machine has a total of 6 GB of RAM. The video card is a Sapphire
ATI/AMD RadeonHD 4870, with 512 MB of video RAM IIRC. It works otherwise
fine with a GENERIC kernel.
>How-To-Repeat:
Run modular Xorg from pkgsrc 2012Q4 on a 6.1_RC2 amd64 XEN3_DOM0 kernel,
with 4096 MB of memory allocated to the DOM0.
>Fix:
Unknown at the moment.
>Audit-Trail:
From: Pierre Pronchery <khorben@defora.org>
To: gnats-bugs@NetBSD.org
Cc:
Subject: Re: port-xen/47669: X fails to start on Xen DOM0 (amd64)
Date: Tue, 19 Mar 2013 21:46:59 +0100
> I haven't experienced this on earlier versions of the netbsd-6 branch;
> however, I have recently raised the amount of RAM allocated to the DOM0
> from 2048 to 4096MB, and I suspect this might well be related.
This appears to be exactly the issue; I have just restarted the machine
with dom0_mem=3072 with the same kernel that failed earlier, and X
starts correctly. So I guess this is not a regression, and therefore not
a showstopper for NetBSD 6.1.
There is however still the issue that X does not work properly if the
DOM0 is allocated 4 GB of RAM.
HTH,
--
khorben
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
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