* Re: [gentoo-user] Re: Backlight problems
@ 2012-03-16 18:15 99% ` Mark Knecht
0 siblings, 0 replies; 1+ results
From: Mark Knecht @ 2012-03-16 18:15 UTC (permalink / raw
To: gentoo-user
On Fri, Mar 16, 2012 at 10:58 AM, Grant <emailgrant@gmail.com> 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.
>
> 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
>
Grant,
Sorry I missed this thread earlier. I've got an Asus 17" laptop
that I've been trying unsuccessfully to get the keyboard backlighting
to work correctly for weeks (maybe months - I no longer remember how
long) On my machine I get keyboard backlighting when I boot the
machine, but if I turn off the lights with the switch on the machine I
cannot so far turn them back on by any means.
On this machine xbacklight -get responds that nothing has backlight
properties so I've clearly got some configuration issues.
As for the kernel I'm using vanilla-sources-3.2.10 so I don't think
there's a lot that is newer than that.
I don't care much about screen backlighting but keyboard
backlighting is important to me.
- Mark
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2012-03-04 21:16 [gentoo-user] Backlight problems Grant
2012-03-05 0:38 ` [gentoo-user] " walt
2012-03-16 17:58 ` Grant
2012-03-16 18:15 99% ` Mark Knecht
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