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
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
