Re: Need help debugging Sony Vaio VPCY2 backlight control problem

Michel Alexandre Salim
2011-07-13T12:51:55Z

The patches don't apply, but looks like the native backlight control
patch is now in Linus' 3.0 tree, and I could cherry-pick Matthew's last
iteration of the i915 patch (from July 7th) from linux-next onto 3.0-rc7.

Going to update my bug report to reflect this. Now the only problem is I
have both acpi_video0 and intel_backlight, and GNOME Power Manager uses
the former rather than the latter. Manually setting the brightness
through the intel_backlight interface works.

Thanks, everyone.

--
Michel

On 07/04/2011 10:57 AM, Zhang Rui wrote:
> Hi, Michael,
>
> please check if the two patches attached help.
>
> thanks,
> rui
>
> On Mon, 2011-07-04 at 16:48 +0800, Michel Alexandre Salim wrote:
>> On 07/04/2011 10:46 AM, Michel Alexandre Salim wrote:
>>> Here are the ectool dumps, before setting any brightness (backlight=0),
>>> after setting it to 5, and after setting it to 3, plus the typescript
>>> log of the commands issued and the sysfs readings.
>>>
>>> I then set brightness back to 0 (ec-after3.txt) -- didn't log the
>>> keyboard interactions because it's the same (value for brightness
>>> concurs with what is set, but actual_brightness is still -1)
>>>
>>> Let me know if you need anything else. Once we can at least pinpoint the
>>> problem to the right subsystem, I'll add these attachments to the
>>> correct bug report.
>>>
>>> Thanks,
>>>
>> And here's the last dump file, forgot to attach it earlier.
>>
>> Thanks,
>>

--
Michel Alexandre Salim
µblog: http://identi.ca/hircus
http://twitter.com/hircus
GPG key ID: 78884778