Kernel Bug Tracker – Bug 11003
brightness control - ASUS A7K
Last modified: 2008-07-11 01:20:03 UTC
Latest working kernel version:2.6.24
Earliest failing kernel version:
Hardware Environment:ASUS A7K Laptop
After the screen brightness has been reduced using keyboard fn+F5 key combinaison, the brightness goes up alone automatically to the maximum level (ouch !)
Steps to reproduce:Lower the brightness using the keyboard.
Will you please attach the output of acpidump?
There are two platform drivers for asus laptop : drivers/acpi/asus-acpi and drivers/misc/asus-laptop. Will you please use the drivers/misc/asus-laptop instead of drivers/acpi/asus-acpi and see whether the problem still exists?
1. kill acpid
2. cat /proc/acpi/events
3, attach the output of you press the hotkey for several times.
I'm afraid I won't be able to send you any additional information.
My laptop is dead :(
It worked only 10 days !!!!
I hope someone with similiar hardware configuration will be able to continue diagnose and report these issues.
From the dmesg in http://bugzilla.kernel.org/show_bug.cgi?id=11004#c8 it seems that the drivers/acpi/asus-acpi is used.
Please use the platform driver of drivers/misc/asus-laptop.c and see whether the problem still exists?
sorry to hear that.
I'll reject this bug as it's UNREPRODUCIBLE.
Please reopen it and it works again someday. :)
I got my laptop up and running again.
It was a hardware issue with the battery that is now resolved.
I reinstalled linux with a complete 64bits environnement : kernel and userspace.
Then I moved to a 2.6.26-rc8 kernel and blacklisted the asus-acpi driver so that asus_laptop module get loaded at init time.
Setting the backlight now perfectly works and the settings are kept after a reboot.
The kernel version is the same. I suppose it was a asus-acpi or a software issue.
Thanks for your help