Brightness OSD doesn't stop adjusting

Thanks for the report, Which version of Ubuntu and GNOME Power Manager are you running?

Intrepid, 2.23.6-0ubuntu1.

Similar symptoms occur on (un)plugging AC power; an invisible box appears in about the right spot for the brightness indicator (one can only notice its presence by a different cursor), and g-p-m's notification icon freezes for a couple of minutes.

What hardware do you have?

There is this line in the changelog for 2.23.1-0ubuntu1, which could be related:

  * 04_brightness_events.patch: Removing. The code upstream has change
    significantly and logic is roughly the same now. May require some
    additional patching, but will wait on user feedback.

It's a Dell Inspiron 630m. i915.

It looks like it is receiving an awful lot (many thousands) of brightness key events for a single press.

As for the strangeness on plugging/unplugging:
TI:13:36:43 TH:0x8d80640 FI:gpm-brightness-xrandr.c FN:gpm_brightness_xrandr_foreach_screen,414
 - using resource 0x8e0e718
TI:13:36:43 TH:0x8d80640 FI:gpm-brightness-xrandr.c FN:gpm_brightness_xrandr_foreach_resource,375
 - resource 1 of 3
TI:13:36:43 TH:0x8d80640 FI:gpm-brightness-xrandr.c FN:gpm_brightness_xrandr_foreach_resource,375
 - resource 2 of 3
TI:13:36:43 TH:0x8d80640 FI:gpm-brightness-xrandr.c FN:gpm_brightness_xrandr_output_set,322
 - percent=50, absolute=7563
TI:13:36:43 TH:0x8d80640 FI:gpm-brightness-xrandr.c FN:gpm_brightness_xrandr_output_set,324
 - hard value=15125, min=0, max=15125

[predictable ~42.5 second hang]

TI:13:37:26 TH:0x8d80640 FI:gpm-brightness-xrandr.c FN:gpm_brightness_xrandr_foreach_resource,375
 - resource 3 of 3
TI:13:37:26 TH:0x8d80640 FI:gpm-backlight.c FN:gpm_backlight_brightness_evaluate_and_set,456
 - emitting brightness-changed : 50
TI:13:37:26 TH:0x8d80640 FI:gpm-profile.c FN:ac_adaptor_changed_cb,635
 - on battery
TI:13:37:26 TH:0x8d80640 FI:gpm-info.c FN:gpm_info_event_log,579
 - Adding 1 to the event log

I suspect it was the removal of 04_brightness_events.patch; the logs indicate something brightness-related and the timeframe is perfect.

The AC state change hang is due to more than 7000 5ms sleeps caused by g-p-m trusting backlight values from XRandR (https://bugs.freedesktop.org/show_bug.cgi?id=15421).

I believe that this might be a duplicate of LP: #261084 I've introducted some code to hopefully fix the repeated keypresses in both situations. Please look at gnome-power-manager_2.24.0-0ubuntu4~ppa2 in my PPA:

http://launchpad.net/~ted-gould/+archive

William, are you still having this issue? Has this been addressed by the updated g-p-m package referred to in bug 261084?

Yes, this is fixed in both intrepid and jaunty now, it seems.