https://bugzilla.kernel.org/show_bug.cgi?id=42272
Summary: Brightness control keys not working on Dell L502X Product: ACPI Version: 2.5 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Power-Other AssignedTo: acpi_power-ot...@kernel-bugs.osdl.org ReportedBy: chiffl...@gmail.com Regression: No The brightness control keys (Fn+F4 and Fn+F5) does not work on the Dell XPS17 L502X (brightness does not change). Other function keys are working properly. Strange thing is that the value stored in /sys/class/backlight/acpi_video0/brightness changes as the function keys are pressed (from 0 to 15), there is just no visible changes. I tried a few things: - booting with acpi_backlight=vendor does not solve the problem (the brightness path changes to /sys/class/backlight/dell_backlight/brightness, and the function keys does not seem to have any effect - the graphics card is an nvidia 555M, I tried with nvidia module, nouveau and in console mode, no changes - bug has also been reported to ubuntu, at https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/762670 I'm using Debian sid/unstable, with kernel 3.0.1 (vanilla, no additional patch). Will attach dsdt, lspci and dmesg to the bugreport. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla