https://bugs.kde.org/show_bug.cgi?id=513809
--- Comment #2 from [email protected] --- (In reply to TraceyC from comment #1) > The symptoms seem related to bug 510483 - where the brightness is dimmed to > 30% incorrectly > > It's possible that the brightness is changing by itself because of a crash > in powerdevil. I also see traces in the logs you provided. e.g. > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: Traced function stack > on entry to i2c_check_open_bus_alive() > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: Traced function stack > 0x7fbf54008e40 for current thread [187478] > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > i2c_check_open_bus_alive > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > ddc_write_read_with_retry > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > ddc_get_nontable_vcp_value > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > read_unsupported_feature > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > check_how_unsupported_reported > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > ddc_initial_checks_by_dh > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > ddc_initial_checks_by_dref > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > dw_add_display_by_businfo > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > dw_hotplug_change_handler > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > process_screen_change_event > Dec 25 10:46:39 aj-desktop org_kde_powerdevil[1213]: > dw_watch_display_connections > > Can you please run this and see if there are coredumps for powerdevil? > > sudo coredumpctl --reverse > > Thanks. coredumpctl doesn't show any crashes related to powerdevil or anything else around times where the monitor brightness has failed to properly reset. I was able to find that running kscreen-doctor output.DP-4.dimming.100; kscreen-doctor output.DP-5.dimming.100 will restore the brightness without having to wait for the idle timer to dim the screens -- You are receiving this mail because: You are watching all bug changes.
