https://bugzilla.kernel.org/show_bug.cgi?id=75091
--- Comment #2 from Nicklas W Bjurman <[email protected]> --- (In reply to Aaron Lu from comment #1) > (In reply to Nicklas W Bjurman from comment #0) > > When then screen goes blank on my laptop after 10 minutes of inactivity the > > backlight is turned off and brightness function keys do not respond. > > Does the function key work OK before the dim happened? Yes, the function keys works as normal both before it happens once and after I fixed it when it does happen. > > > > To turn the backlight on again, I have to write a 1 to > > /sys/class/backlight/intel_backlight/bl_power or if the screen blanks again > > I have to write a 0 to turn the backlight on. > > This is interesting. I don't know that bl_power has such effects, from the > GPU driver code, it doesn't seem to do anything for bl_power change. Does > the interface work well normally? i.e. if you echo a value in the range of > 0-max_brightness to brightness file, does it work well? max_brightness is 255000 which is also the value of bl_power before it happens. I can not write to /sys/class/backlight/intel_backlight/bl_power If I want to change the brightness I manually I need to write a value to /sys/class/backlight/acpi0_video/brightness in the range of 0 and /sys/class/backlight/acpi0_video/max_brightness(which happens to be 7). -- You are receiving this mail because: You are watching the assignee of the bug. ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
