Re: backlight gone?

[Zhang Rui <rui.zhang@intel.com>]

does this patch help?
https://patchwork.kernel.org/patch/499221/

thanks,
rui

On Mon, 2011-01-24 at 10:57 +0800, Norbert Preining wrote:
> Hi everyone,
> 
> I have seen that on lkml, too, and experience it myself: Suddenly the
> backlight is gone:
> [    2.018622] No ACPI video bus found
> up to 2.6.37 there was one ...
> 
> There are some other things regarding i915/drm in my dmesg:
> [    1.520109] [drm] Initialized drm 1.1.0 20060810
> [    1.520190] i915 0000:00:02.0: power state changed by ACPI to D0
> [    1.520246] i915 0000:00:02.0: power state changed by ACPI to D0
> [    1.520305] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> [    1.520363] i915 0000:00:02.0: setting latency timer to 64
> [    1.572889] i915 0000:00:02.0: irq 43 for MSI/MSI-X
> [    1.572895] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
> [    1.572952] [drm] Driver supports precise vblank timestamp query.
> [    1.573312] [drm:intel_dsm_pci_probe] *ERROR* failed to get supported _DSM functions
> [    1.620092] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
> [    2.015219] Console: switching to colour frame buffer device 200x56
> [    2.018568] fb0: inteldrmfb frame buffer device
> [    2.018590] drm: registered panic notifier
> [    2.018622] No ACPI video bus found
> [    2.018842] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
> 
> That is with latest git kernel.
> 
> Anything else needed here?
> 
> Best wishes
> 
> Norbert
> ------------------------------------------------------------------------
> Norbert Preining            preining@{jaist.ac.jp, logic.at, debian.org}
> JAIST, Japan                                 TeX Live & Debian Developer
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