On Fri, Aug 02, 2013 at 02:00:42PM +0800, Aaron Lu wrote: > Assume you have specified to use intel_backlight in xorg.conf Right, I have: Section "Device" Option "Backlight" "intel_backlight" Identifier "Card0" Driver "intel" BusID "PCI:0:2:0" EndSection in there currently. > does booting with video.brightness_switch_enabled=0 help? Nope. Kernel command line is like this: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0-rc3+ root=/dev/sdb2 ro root=/dev/sdb2 ignore_loglevel log_buf_len=10M resume=/dev/sdb1 acpi_backlight=vendor video.brightness_switch_enabled=0 i915.i915_enable_rc6=4 i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.powersave=1 and acpi_backlight=vendor doesn't make any difference. It still works over sysfs though. Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel