From: Aaron Lu <aaron.lu@intel.com>
To: Seth Forshee <seth.forshee@canonical.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>, Ben Jencks <ben@bjencks.net>,
Len Brown <lenb@kernel.org>,
linux-acpi@vger.kernel.org, joeyli <jlee@suse.com>,
Matthew Garrett <mjg59@srcf.ucam.org>
Subject: Re: [PATCH] ACPI: Disable Windows 8 compatibility for some Lenovo ThinkPads
Date: Mon, 22 Apr 2013 22:07:32 +0800 [thread overview]
Message-ID: <51754424.6040203@intel.com> (raw)
In-Reply-To: <20130422135651.GB31365@thinkpad-t410>
On 04/22/2013 09:56 PM, Seth Forshee wrote:
> On Mon, Apr 22, 2013 at 09:40:00PM +0800, Aaron Lu wrote:
>> On 04/22/2013 09:06 PM, Seth Forshee wrote:
>>> On Mon, Apr 22, 2013 at 08:11:17PM +0800, Aaron Lu wrote:
>>>> On 04/22/2013 07:51 PM, Rafael J. Wysocki wrote:
>>>>> I suppose we need to blacklist them to start with. I wouldn't like to apply
>>>>> any general changes before we know how many different systems are affected by
>>>>> this particular issue.
>>>>
>>>> I totally agree.
>>>
>>> Are you sure that all of these machines have an alternate interface for
>>> userspace to change the brightness? I know that I've got a non-Lenovo
>>> machine with nVidia graphics for which nouveau exposes no backlight
>>
>> What's the problem with this system then? The same as the thinkpads in
>> bug 51231?
>
> There's no problem with that system; it has another working backlight
> interface. I'm only mentioning it to demonstrate that taking away the
> ACPI interface could leave some machines without any backlight control
> mechanism that Linux currently supports.
I think we just need take away the ACPI interface for these known broken
systems for now, that would require: check if we are in win8 mode, if
so, disable acpi video interface for these known broken systems.
I think video_detect_dmi_table is the proper place to do this.
-Aaron
next prev parent reply other threads:[~2013-04-22 14:07 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-11 16:21 [PATCH] ACPI: Disable Windows 8 compatibility for some Lenovo ThinkPads Seth Forshee
2013-02-11 17:52 ` Matthew Garrett
2013-02-11 19:06 ` Seth Forshee
2013-02-11 19:09 ` Matthew Garrett
2013-02-11 19:31 ` Rafael J. Wysocki
2013-02-12 3:05 ` Seth Forshee
2013-02-13 20:32 ` Seth Forshee
2013-02-13 20:55 ` Matthew Garrett
2013-02-13 21:04 ` Ben Jencks
2013-02-13 21:49 ` Seth Forshee
2013-02-13 21:46 ` Seth Forshee
2013-02-13 21:54 ` Matthew Garrett
2013-02-13 22:04 ` Seth Forshee
2013-03-07 19:38 ` Seth Forshee
2013-03-07 19:39 ` [PATCH 1/5] ACPICA: Add interface for getting latest Windows version requested via _OSI Seth Forshee
2013-03-07 19:39 ` [PATCH 2/5] acpi_video: Avoid unnecessary conversions between backlight levels and indexes Seth Forshee
2013-03-07 19:39 ` [PATCH 3/5] acpi_video: Add workaround for broken Windows 8 backlight implementations Seth Forshee
2013-04-04 11:44 ` Aaron Lu
2013-04-04 12:35 ` Seth Forshee
2013-04-04 13:46 ` Aaron Lu
2013-04-04 14:02 ` Seth Forshee
2013-04-04 14:27 ` Aaron Lu
2013-03-07 19:39 ` [PATCH 4/5] acpi_video: Disable use of _BQC when value doesn't match those set through _BCM Seth Forshee
2013-03-07 19:39 ` [PATCH 5/5] acpi_video: Don't handle ACPI brightness notifications by default Seth Forshee
2013-08-02 5:55 ` Aaron Lu
2013-08-02 14:41 ` Rafael J. Wysocki
2013-08-02 14:52 ` Aaron Lu
2013-08-03 0:26 ` Rafael J. Wysocki
2013-08-03 9:46 ` Aaron Lu
2013-08-03 11:23 ` Rafael J. Wysocki
2013-08-03 12:10 ` Aaron Lu
2013-08-03 22:07 ` Rafael J. Wysocki
2013-08-04 1:08 ` Aaron Lu
2013-03-18 21:25 ` [PATCH] ACPI: Disable Windows 8 compatibility for some Lenovo ThinkPads Seth Forshee
2013-04-02 5:18 ` Ben Jencks
2013-04-02 9:15 ` Aaron Lu
2013-04-02 11:23 ` Matthew Garrett
2013-04-02 13:44 ` Aaron Lu
2013-04-02 19:08 ` Matthew Garrett
2013-04-19 12:24 ` Seth Forshee
2013-04-20 22:06 ` Rafael J. Wysocki
2013-04-21 2:29 ` Seth Forshee
2013-04-21 15:46 ` Henrique de Moraes Holschuh
2013-02-13 21:09 ` Ben Jencks
2013-04-01 1:53 ` Aaron Lu
2013-04-01 13:03 ` Seth Forshee
2013-04-02 9:08 ` Aaron Lu
2013-04-02 13:00 ` Seth Forshee
2013-04-02 13:43 ` Aaron Lu
2013-04-03 7:04 ` Ben Jencks
2013-04-03 7:27 ` Aaron Lu
2013-04-03 13:45 ` Seth Forshee
2013-04-04 11:39 ` Aaron Lu
2013-04-19 3:15 ` Aaron Lu
2013-04-20 22:06 ` Rafael J. Wysocki
2013-04-21 11:07 ` Aaron Lu
2013-04-21 12:11 ` Aaron Lu
2013-04-21 21:42 ` Rafael J. Wysocki
2013-04-22 9:39 ` Aaron Lu
2013-04-22 11:51 ` Rafael J. Wysocki
2013-04-22 12:11 ` Aaron Lu
2013-04-22 13:06 ` Seth Forshee
2013-04-22 13:40 ` Aaron Lu
2013-04-22 13:56 ` Seth Forshee
2013-04-22 14:07 ` Aaron Lu [this message]
2013-04-22 15:11 ` Seth Forshee
2013-04-22 2:18 ` joeyli
2013-04-22 10:08 ` Aaron Lu
2013-04-22 12:00 ` joeyli
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=51754424.6040203@intel.com \
--to=aaron.lu@intel.com \
--cc=ben@bjencks.net \
--cc=jlee@suse.com \
--cc=lenb@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=mjg59@srcf.ucam.org \
--cc=rjw@sisk.pl \
--cc=seth.forshee@canonical.com \
/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;
as well as URLs for NNTP newsgroup(s).