GNOME Bugzilla – Bug 730310
backlight changing to maximum when plug or unplug AC
Last modified: 2014-05-19 09:46:14 UTC
Created attachment 276707 [details] video with bug Steps to reproduce: 1. Set backlight to <100% with keyboard 2. Plug or unplug AC Actual results: Backlight changed to maximum Expected results: Backlight unchanged Additional info: # grep -r . /sys/class/backlight/* /sys/class/backlight/intel_backlight/type:raw /sys/class/backlight/intel_backlight/brightness:444 /sys/class/backlight/intel_backlight/power/control:auto /sys/class/backlight/intel_backlight/power/async:disabled /sys/class/backlight/intel_backlight/power/runtime_enabled:disabled /sys/class/backlight/intel_backlight/power/runtime_active_kids:0 /sys/class/backlight/intel_backlight/power/runtime_active_time:0 grep: /sys/class/backlight/intel_backlight/power/autosuspend_delay_ms: Input/output error /sys/class/backlight/intel_backlight/power/runtime_status:unsupported /sys/class/backlight/intel_backlight/power/runtime_usage:0 /sys/class/backlight/intel_backlight/power/runtime_suspended_time:0 /sys/class/backlight/intel_backlight/bl_power:0 /sys/class/backlight/intel_backlight/max_brightness:4438 /sys/class/backlight/intel_backlight/actual_brightness:444 I think this is caused, because in my system doesn't present acpi_video0. Only intel_backlight. But it's normal for the my system: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5915a3db0c3983f1cd5e046bf70086c7d0c686d2 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=67b662e189f469c6d373f81d76b0ef0495940e99 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fbc9fe1b4f222a7c575e3bd8e9defe59c6190a04 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0e9f81d3b7cd0649a3bc437391b6a0650f98f844
On panel I don't see backlight changes after plug or unplug AC.
$ gdbus call --session --dest org.gnome.SettingsDaemon.Power --object-path /org/gnome/SettingsDaemon/Power --method org.gnome.SettingsDaemon.Power.Screen.StepUp returning to me: (25,) and something like this. maximum - 100. I think here main problem
This is one of those dreadful Lenovo laptops?
(In reply to comment #3) > This is one of those dreadful Lenovo laptops? Not dreadful, but yes. X1 Carbon. I can reproduce this on X230.
(In reply to comment #4) > (In reply to comment #3) > > This is one of those dreadful Lenovo laptops? > > Not dreadful, but yes. X1 Carbon. I can reproduce this on X230. Dreadful in terms of firmware. It's a firmware bug. We don't change the brightness in gnome-settings-daemon at all. (and I have an X1 carbon as well) *** This bug has been marked as a duplicate of bug 722131 ***