From: Volker Armin Hemmann <volkerarmin@googlemail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] IOMMU and other oddities...
Date: Wed, 10 Aug 2011 17:56:45 +0200 [thread overview]
Message-ID: <69108206.71srOKDlQR@localhost> (raw)
In-Reply-To: <20110809053234.GA3081@solfire>
Am Dienstag 09 August 2011, 07:32:34 schrieb meino.cramer@gmx.de:
> Hi,
>
> my PC consists -- beside other things -- of a AMD Phenom II X6 1090T,
> a ASUS Crossfire Formula IV and a NVidia GeForce GT 430 by MSI (PCIe).
> Furthermore I am using the vanilla Linux kernel 3.0.1. .
>
> I browsed through the output of dmesg and found these lines:
>
> Checking aperture...
> No AGP bridge found
> Node 0: aperture @ c4000000 size 32 MB
> Aperture pointing to e820 RAM. Ignoring.
> Your BIOS doesn't leave a aperture memory hole
> Please enable the IOMMU option in the BIOS setup
> This costs you 64 MB of RAM
> Mapping aperture over 65536 KB of RAM @ c4000000
>
> The kernel is not configured with any AGP-related (as far as I now)
> feature/config.
>
> Why does it look for an AGP-bridge???
>
> The dmesg says I should switch on IOMMU, which I did. But that does
> not impress the kernel that much since it still recommends to switch
> on IOMMU.
>
> What did I wrong here ?
>
> I want to fix issues, which may be reported by dmesg, so:
> Where can I find explanations to the dmesg output?
>
> For your information I attached the compressed dmesg output
> to this mail.
>
> Thank you very much for your help in advance!
> Best regards
> mcc
see also this:
http://marc.info/?l=linux-kernel&m=107764033904042&w=2
--
#163933
prev parent reply other threads:[~2011-08-10 15:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-09 5:32 [gentoo-user] IOMMU and other oddities meino.cramer
2011-08-09 5:58 ` Adam Carter
2011-08-09 6:31 ` meino.cramer
2011-08-09 8:58 ` pk
2011-08-09 11:22 ` meino.cramer
2011-08-10 15:56 ` Volker Armin Hemmann [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=69108206.71srOKDlQR@localhost \
--to=volkerarmin@googlemail.com \
--cc=gentoo-user@lists.gentoo.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox