Hi everyone!
Recently I came out with a brand new Dell laptop. Just beautiful and powerful I must say. A Dell XPS 15 (formerly L501X).
The first thing to do when you receive a ready-to-go computer is just format it all, while downloading the latest slack on the old one thinking about all the new possibilities that new box will give you (just the old ones but a little bit faster
).
Well... installed my slackware64 13.1, upgraded to -current. Just ~20 recompiles of latest 2.6.37 kernel just to see your desktop working as it should. But there is always something that goes wrong; in this is case is brightness controls with Fn + F4/F5.
It just doesn't work!
I compiled the kernel with dell_wmi and dell_laptop extras. Neither just seem to do anything meaningful.
With a fresh boot, pressing Fn + F4 cause the brightness to be slightly reduced, subsequents tries just spit out tons of:
Code:
Jan 10 10:58:02 xpsbox logger: ACPI group video / action brightnessdown is not defined
Jan 10 10:58:02 xpsbox logger: ACPI group PNP0C14:00 / action 000000d0 is not defined
...and the brightness is locked to the top value.
Googling around I've found that Mr. Kamal Mostafa (
http://ubuntuforums.org/showthread.php?t=1636959) developed a fix for ubuntu kernel. I tried to apply that (outdated) patch manually to a 2.6.37 kernel but the API probably changed, probably I did it wrong... it didn't fix the issue.
My accelerated desktop is working with i915 driver with modesetting enabled by default, without any nvidia driver (is a double GPU system: i3 integrated one and nvidia [HybridPower]).
This is really driving me mad!!
Any hint for applying that patch or anything else would be really appreciated.
Any information you eventually need, just ask.
Thank you in advance.
Greetings,
Karimo