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>>>> On my just-released Dell XPS 13 Ultrabook, I can control the backlight |
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>>>> with 'xbacklight -set 0' and 'xbacklight -set 100'. Any other values |
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>>>> cause the screen to blink and flash. The keyboard backlight shortcuts |
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>>>> don't work unless I map them to xbacklight 0 and 100. Also xbacklight |
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>>>> doesn't work at all if I'm unplugged from AC. I've tried |
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>>>> acpi_osi=Linux and acpi_backlight=vendor in grub.conf. acpi_osi |
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>>>> doesn't seem to make any difference and xbacklight doesn't work at all |
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>>>> without acpi_backlight. Do I just need to wait for a newer kernel? |
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>>> |
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>>> Does the gentoo install CD or a rescue CD give you any way to test the |
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>>> same backlight functions? If the backlight works correctly when running |
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>>> such a CD then listing the loaded kernel modules might give you a clue. |
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>> |
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>> I tried the latest Kubuntu and Ubuntu LiveCDs via unetbootin but the |
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>> backlight behavior is the same as with Gentoo. Please let me know if |
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>> anyone has any ideas on this. |
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>> |
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>> - Grant |
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>> |
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> |
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> Grant, |
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> Sorry I missed this thread earlier. I've got an Asus 17" laptop |
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> that I've been trying unsuccessfully to get the keyboard backlighting |
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> to work correctly for weeks (maybe months - I no longer remember how |
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> long) On my machine I get keyboard backlighting when I boot the |
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> machine, but if I turn off the lights with the switch on the machine I |
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> cannot so far turn them back on by any means. |
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> |
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> On this machine xbacklight -get responds that nothing has backlight |
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> properties so I've clearly got some configuration issues. |
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> |
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> As for the kernel I'm using vanilla-sources-3.2.10 so I don't think |
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> there's a lot that is newer than that. |
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> |
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> I don't care much about screen backlighting but keyboard |
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> backlighting is important to me. |
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> |
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> - Mark |
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|
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Hey Mark, I'm happy to say I just fixed the screen backlighting on my |
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system, but I'm sorry to say I don't think it will help you with |
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keyboard backlighting. To fix it, I removed 'acpi_backlight=vendor' |
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from grub and added 'echo 0 > |
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/sys/class/backlight/intel_backlight/brightness' to |
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/etc/local.d/backlight.start and made that file executable. Now |
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backlight control works perfectly via the keyboard shortcuts with no |
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other configuration and no xbacklight. I'm on |
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hardened-sources-3.2.2-r1. |
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|
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BTW, I noticed baselayout1.start and baselayout1.stop are no longer |
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created in /etc/local.d. |
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|
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- Grant |
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