Bug#651741: gnome-power-manager: display backlight brightness has no effect on Sony Vaio VPCYA1V9E

It seems adding only one kernel parameter "acpi_backlight=vendor" also
works on my G360 now. But, both methods of adding kernel parameters will
stop work occasionly.

The detail of my case see:
Bug 44809 - [Arrandale backlight] Brightness via RANDR has no effect on
Sony VAIO VPCYA1V9E: https://bugs.freedesktop.org/show_bug.cgi?idD809

2012/6/12 littlebat

Added "acpi_backlight=vendor acpi_osi=linux video.brightness_switch_enabled=1"
into grub boot kernel parameters, "Fn + Up/Down" to change brigtness works on
my G360. It's no need to write a Udev rules like my previous method.

<div>It seems adding only one kernel parameter &quot;acpi_backlight=vendor&quot; also works on my G360 now. But, both methods of adding kernel parameters will stop work occasionly.</div><div><br></div><div>The detail of my case see:</div>
<div>Bug 44809 - [Arrandale backlight] Brightness via RANDR has no effect on Sony VAIO VPCYA1V9E: <a href="https://bugs.freedesktop.org/show_b...;>https://bugs.freedesktop.org/show_bug.cgi?id=44809</a></div><br>
<div class="gmail_quote">2012/6/12 littlebat <span dir="ltr">&lt;<a href="mailto:" target="_blank"></a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<pre style="width:50em;white-space:pre-wrap">Added &quot;acpi_backlight=vendor acpi_osi=linux video.brightness_switch_enabled=1&quot;
into grub boot kernel parameters, &quot;Fn + Up/Down&quot; to change brigtness works on
my G360. It&#39;s no need to write a Udev rules like my previous method.</pre>
</blockquote></div><br>




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