LKML Archive on
help / color / mirror / Atom feed
From: Matthew Garrett <>
To: Henrique de Moraes Holschuh <>
Cc: Pavel Machek <>, Len Brown <>,,
Subject: Re: Lenovo ThinkPads need acpi_osi="Linux"
Date: Mon, 14 Jan 2008 02:03:52 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Sun, Jan 13, 2008 at 11:57:18PM -0200, Henrique de Moraes Holschuh wrote:
> On Mon, 14 Jan 2008, Matthew Garrett wrote:
> > not going to want the low-level ACPI code to do anything video-related 
> > on a lot of hardware. The in-kernel modesetting code for Intel machines 
> > will be able to handle this significantly more effectively.
> Yeah, but we have a ton of machines (thinkpads among them) with ATI, and
> other GPUs.

The ATI case is certainly more of an issue, but I'm becoming more 
optimistic about that being workable in the near future - certainly on 
machines with ATOM-based BIOSes.
> Whitelists would need to be reasonably specific, anyway (not "all
> thinkpads"), so it just means "don't do it on certain R50e", or whatever.

I'd prefer not to push this policy into the kernel, since the right 
thing to do depends on which graphics drivers you're using and so on. 
Userspace is in a better position to make this determination. Of course, 
this also means not passing the Linux OSI to the firmware. Our hardware 
interaction is sufficiently in flux that any attempt to work around it 
in the firmware is just going to lead to bizarre breakage down the road.

Matthew Garrett |

  reply	other threads:[~2008-01-14  2:04 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-12  2:23 Lenovo ThinkPads need acpi_osi="Linux" Henrique de Moraes Holschuh
2008-01-12  9:16 ` Len Brown
2008-01-12 20:23   ` Henrique de Moraes Holschuh
2008-01-13 16:58   ` Pavel Machek
2008-01-13 23:41     ` Henrique de Moraes Holschuh
2008-01-14  0:35       ` Matthew Garrett
2008-01-14  1:50         ` Matthew Garrett
2008-01-14  1:57           ` Henrique de Moraes Holschuh
2008-01-14  2:03             ` Matthew Garrett [this message]
2008-01-14 13:06               ` Henrique de Moraes Holschuh
2008-01-12 15:49 ` Alan Cox
2008-01-14  0:10 ` Henrique de Moraes Holschuh

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \

* 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;
as well as URLs for NNTP newsgroup(s).