From: Grant <emailgrant@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: Backlight problems
Date: Fri, 16 Mar 2012 10:58:44 -0700 [thread overview]
Message-ID: <CAN0CFw26pxVvL=3CiHv6N+557fHM5-+uCLCUxQkA=sA3SDuZUQ@mail.gmail.com> (raw)
In-Reply-To: <jj11ua$its$1@dough.gmane.org>
>> 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.
I tried the latest Kubuntu and Ubuntu LiveCDs via unetbootin but the
backlight behavior is the same as with Gentoo. Please let me know if
anyone has any ideas on this.
- Grant
next prev parent reply other threads:[~2012-03-16 17:59 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 ` [gentoo-user] " walt
2012-03-05 1:14 ` Grant
2012-03-16 17:58 ` Grant [this message]
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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