Created attachment 6522 screenshot showing brightness indicator When adjusting screen brightness using the keyboard, the brightness indicator shows up empy. Just to be clear - brightness **DOES** change. Only the indicator shows no scale/information. The screenshot attached showing this behavior was taken under greybird theme. The same behavior seems to exist in other themes as well (so not a theme issue, I believe).
Created attachment 6556 bug fix The bug was introduced on 2015-03-22 in commit 9efe26ead5bb1e0f100c0d126b105d1ed2d5b131: the xfpm-* icons were removed in favor of the UPower icons, but xfpm_show_notification() still calls xfpm_notify_new_notification() with the old icon name "xfpm-display-brightness-lcd". The notification box seems empty because xfce4-notifyd sets the width of the progress bar to 4 times the width of the icon (which cannot be found, probably 0 - see xfce4-notifyd/xfce-notify-window.c, in function xfce_notify_window_set_gauge_value). The attached patch which should fix the issue.
Created attachment 6557 patch fixing both icon names I just went through the results of 'grep -rn xfpm- src/' in my local xfce4-power-manager repository. There's another instance of trying to load a removed icon, in src/xfpm-kbd-backlight.c:117 ("xfpm-brightness-keyboard" should probably be changed to "keyboard-brightness"). I never saw that notification - is it only for backlit keyboards? I now attached a patch containing both changes.
patch in comment 2 fixes the issue for me! Thanks Laurentiu!
This bug affects Fedora 23. See: https://bugzilla.redhat.com/show_bug.cgi?id=1278772
Thanks for the patch and sorry for taking so long to review and merge it. Pushed to master in http://git.xfce.org/xfce/xfce4-power-manager/commit/?id=2ff69c8475cfb4b121ba107c41249a63aa8dffb2
*** Bug 12302 has been marked as a duplicate of this bug. ***
Any plans for a release to push this bugfix downstream?
Sorry, I missed to add this link: https://bugzilla.redhat.com/show_bug.cgi?id=1278772#c8