@Kamal Mostafa: any mainline-related updates?
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https://bugs.launchpad.net/bugs/568611
Title:
Screen brightness control fails on Dell Studio 1558
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i915.alse_backlight=1 doesn't have any significant effect for me.
Brightness can be lightened on again only with hotkeys
(brightness_workaraound.pl script associated to Fn Keys).
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I've discovered a slight difference with i915.alse_backlight=1:
the actions over the intel_backlight interface (script associated with key
combination [ echo NUM intel_backlight ]) can reestablish a correct screen
brightness while without that kernel parameters, those same actions, seem to be
I've noticed a bug with the 2.6.38 patched kernel:
when the backlight is powered off by a power managemente agent, it can't be
lightened on again!
Also with:
$ xset dpms force off
turns the screen off but it cannot be lightened back! The computer still
perfectly working, but no screen!
With
Just patched a vanilla 2.6.38 kernel on dell laptop XPS 15 running Slackware
13.37.
The intel_brightness interface works great!
Just to let it be used within kde I've written two trivial utilities:
brightness_workaround.pl
#!/usr/bin/perl
open(ACTUAL,
Thanks KAMAL!
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/568611
Title:
Screen brightness control fails on Dell Studio 1558
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