I have a Lenovo U350 and the problem is *not* fixed as of kernel 2.6.32
$ uname -a Linux lenovo-u350 2.6.32-020632rc5-generic #020632rc5 SMP Fri Oct 16 09:06:17 UTC 2009 x86_64 GNU/Linux
$ dmesg |tail [ 240.118833] ACPI: Failed to switch the brightness [ 240.614684] ACPI: Failed to switch the brightness
I have a Lenovo U350 and the problem is *not* fixed as of kernel 2.6.32
$ uname -a 020632rc5- generic #020632rc5 SMP Fri Oct 16 09:06:17 UTC 2009 x86_64 GNU/Linux
Linux lenovo-u350 2.6.32-
$ dmesg |tail
[ 240.118833] ACPI: Failed to switch the brightness
[ 240.614684] ACPI: Failed to switch the brightness