Kernel Bug Tracker – Bug 13076
Fn + brightness up/down keys doesn't work if ACPI enabled - Samsung NC20
Last modified: 2009-09-05 05:22:52 UTC
Created attachment 20950 [details]
This bug is similar to most new samsung laptops including the NC10 which is addressed in bug 12021
I have created a bug report downstream in the Ubuntu bug tracker:
Distribution: Ubuntu Jaunty Beta
Steps to reproduce:
Press fn key plus up arrow to increase brightness, press fn key plus down arrow to decrease brightness
Screen brightness is increased or decreased
fn plus down arrow reduces brightness to minimum.
fn plus up arrow increases brightness to maximum.
Gnome interface becomes unusable: menus cannot be clicked, keyboard becomes unresponsive
The behaviour observed is because the key release events after brightness up and brightness down are not generated. This has the effect of repeating the brightness up or brightness down keys indefinitely. This causes the "all or nothing" effect on brightness and the unresponsive Gnome GUI.
Created attachment 20951 [details]
Created attachment 20952 [details]
patch for atkbd.c to add nc20 forced release keys
Added patch which I have tested to fix the problem on my machine.
Thank you very much for the patch. Can I please have your "Signed-off-by: ..." so I can apply it and make sure it gets into 2.6.30? Thanks!
That sounds great, thanks. This is my first patch so I'm unsure about "Signed-off-by". Hopefully it's just the following, but let me know if you need me to do anything else!
Signed-off-by: Barry Carroll <email@example.com>
Yep, that is it. It just certifies that your patch conforms to the following:
Thanks for the link, I read through it and everything is in order.
Patch is in mainline, closing.