On Sun, 22 Feb 2015, Georges Giralt wrote: > I own a brand new Lenovo E540 (20C600JHFR) fitted with a full HD LCD > screen. > > I've installed Ubuntu 14.04 LTS and exploring the syslog file for > unsupported hardware I've found the following message : > ======== > thinkpad_acpi: Unsupported brightness interface, please contact > ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx > [ 11.725474] thinkpad_acpi: This ThinkPad has standard ACPI backlight > brightness control, supported by the ACPI video driver > [ 11.725476] thinkpad_acpi: Disabling thinkpad-acpi brightness events > by default... > ======== > > I noticed that the brightness control is very coarse instead of the > smooth control experienced in Windows > How could I help ? The brightness control is done by the gpu on just about every laptop nowadays, so you should talk to the people behind the gpu drivers and x.org. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
