[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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Backlight buttons are working fine here (XPS 15 9530, Ubuntu 14.04,
kernel 3.13.2-031302-generic).
No acpi keywords added to the grub parameters, and no modification
performed in any xorg.conf files.
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Ellis Michael, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report by executing the following in a
terminal:
ubuntu-bug xorg
Please ensure you have xdiagnose installed, and that you click the Yes
button for attaching additional debugging in
I'm experiencing the same behavior as above. I'm using Ubuntu 13.10 and
the 3.13 mainline kernel.
I was able to find a workaround that let me control the backlight
brightness through the applet.
Create /etc/X11/xorg.conf.d/20-intel.conf with the following:
Section "Device"
Identifier
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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I am having the similar issue on Ubuntu 13.10. Under
/sys/class/backlight, I have 2 interfaces: intel_backlight and
dell_backlight. By echo brightness values into 2 different interfaces,
the intel one is the actual brightness control interface. Tried to
remove dell-laptop kernel module, and addi
Maybe this is the fix:
http://comments.gmane.org/gmane.linux.kernel/1604523
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Title:
8086:0046 [Dell XPS 15 L501x] Unable to change b
Benjamin Hilton, could you please test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-trusty/ and advise
to the results?
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** Tags removed: bios-outdated-a08
** Tags added: latest-bios-a08
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Title:
8086:0046 [Dell XPS 15 L501x] Unable to change backlight b
Updating my BIOS did not change anything.
I have upgraded to 13.10, and now I no longer get the error message.
Instead, dell_laptop.backlight=0 does not change anything, and I am left
having to repeatedly fiddle with the keys or use "echo [brightness
value] | sudo tee /sys/class/backlight/intel_ba
** Changed in: linux (Ubuntu)
Importance: Medium => Low
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Title:
8086:0046 [Dell XPS 15 L501x] Unable to change backlight by defau
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