From: walt <w41ter@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: [gentoo-user] Re: Backlight problems
Date: Sun, 04 Mar 2012 16:38:34 -0800 [thread overview]
Message-ID: <jj11ua$its$1@dough.gmane.org> (raw)
In-Reply-To: <CAN0CFw3QwXwMA9-PGXVg+0w2u+WKw9U4zeah3O_FWjgJUkZ8SA@mail.gmail.com>
On 03/04/2012 01:16 PM, Grant wrote:
> On my just-released Dell XPS 13 Ultrabook, I can control the backlight
> with 'xbacklight -set 0' and 'xbacklight -set 100'. Any other values
> cause the screen to blink and flash. The keyboard backlight shortcuts
> don't work unless I map them to xbacklight 0 and 100. Also xbacklight
> doesn't work at all if I'm unplugged from AC. I've tried
> acpi_osi=Linux and acpi_backlight=vendor in grub.conf. acpi_osi
> doesn't seem to make any difference and xbacklight doesn't work at all
> without acpi_backlight. Do I just need to wait for a newer kernel?
Does the gentoo install CD or a rescue CD give you any way to test the
same backlight functions? If the backlight works correctly when running
such a CD then listing the loaded kernel modules might give you a clue.
next prev parent reply other threads:[~2012-03-05 0:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-04 21:16 [gentoo-user] Backlight problems Grant
2012-03-05 0:38 ` walt [this message]
2012-03-05 1:14 ` [gentoo-user] " Grant
2012-03-16 17:58 ` Grant
2012-03-16 18:15 ` Mark Knecht
2012-03-16 18:55 ` Grant
2012-03-16 19:25 ` Mark Knecht
2012-03-16 19:33 ` Mark Knecht
2012-03-16 20:06 ` Grant
2012-03-16 22:36 ` Neil Bothwick
2012-03-17 0:11 ` Grant
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