Re: [PATCH] ACPI / video: Add HP EliteBook Revolve 810 to theblacklist

From: Mika Westerberg
Date: Fri Feb 07 2014 - 05:18:31 EST

On Fri, Feb 07, 2014 at 09:29:58AM +0800, Aaron Lu wrote:
> On 02/03/2014 06:59 PM, Mika Westerberg wrote:
> > On HP EliteBook Revolve 810 the ACPI backlight device doesn't work as
> > expected. For example when resuming from system sleep, it seems to lose
> > backlight settings.
> >
> > Forcing Intel driver fixes the problem so add this machine the ACPI
> > video detect blacklist.
> For reference's purpose, can you please file a bug to kernel bugzilla
> under the ACPI/Power-Video category and attach the acpidump and dmesg
> there? Thanks.

Done, the bug is here:

I noticed that using only the acpi_video0 for tuning backlight works but if
I use intel_backlight directly, on resume I get values from acpi_video0
instead. I'm not really familiar how this is supposed to work, though so
please let me know if I'm missing something.

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