| 1 |
>> On my just-released Dell XPS 13 Ultrabook, I can control the backlight |
| 2 |
>> with 'xbacklight -set 0' and 'xbacklight -set 100'. Any other values |
| 3 |
>> cause the screen to blink and flash. The keyboard backlight shortcuts |
| 4 |
>> don't work unless I map them to xbacklight 0 and 100. Also xbacklight |
| 5 |
>> doesn't work at all if I'm unplugged from AC. I've tried |
| 6 |
>> 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 |
| 11 |
> same backlight functions? If the backlight works correctly when running |
| 12 |
> such a CD then listing the loaded kernel modules might give you a clue. |
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| 14 |
I tried the latest Kubuntu and Ubuntu LiveCDs via unetbootin but the |
| 15 |
backlight behavior is the same as with Gentoo. Please let me know if |
| 16 |
anyone has any ideas on this. |
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| 18 |
- Grant |
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