Re: [PATCH 2.6.18-mm2] acpi: add backlight support to the sony_acpi driver

Yu Luming
2006-10-11T16:31:13Z

On Wednesday 11 October 2006 16:04, Ismail Donmez wrote:
> 11 Eki 2006 Çar 10:04 tarihinde, Matthew Garrett şunları yazmıştı:
> > On Wed, Oct 11, 2006 at 08:59:04AM +0200, Arjan van de Ven wrote:
> > > it'd also be nice if the linux-ready firmware developer kit had a test
> > > for this, so that we can offer 1) a way to test this to the bios guys
> > > and 2) encourage adding/note the lack easily
> >
> > Sure. Reading /proc/acpi/video/*/*/info should tell you whether a device
> > is an LCD or not.
>
> On my Sony Vaio with latest linux-2.6 git kernel it says its a CRT :
>
> [~]> cat /proc/acpi/video/*/*/info
> device_id: 0x0100
> type: CRT
> known by bios: no
> device_id: 0x0320
> type: UNKNOWN
> known by bios: no
> device_id: 0x0410
> type: UNKNOWN
> known by bios: no
> device_id: 0x0240
> type: UNKNOWN
> known by bios: no
> device_id: 0x0100
> type: CRT
> known by bios: no
> device_id: 0x0111
> type: UNKNOWN
> known by bios: no
> device_id: 0x0118
> type: UNKNOWN
> known by bios: no
> device_id: 0x0200
> type: TVOUT
> known by bios: no
>
> So I don't think its reliable.
Please open a bug on bugzilla.kernel.org,
and post acpidump output.

Thanks,
Luming