Samsung Q210 - No "released" events on brightness change

[Stephen Brandwood]

Binary package hint: hal-info

In reply to the original bug report:

https://bugs.launchpad.net/ubuntu/+source/hal-info/+bug/333352

The brightness keys make the brightness go up and down, but when using input-events, there is no "released" event for either key:

21:36:42.979320: EV_KEY KEY_BRIGHTNESSUP (0xe1) pressed
21:36:42.979325: EV_SYN code=0 value=0
21:36:43.266034: EV_MSC code=4 value=137
21:36:43.266064: EV_KEY KEY_BRIGHTNESSDOWN (0xe0) pressed
21:36:43.266068: EV_SYN code=0 value=0
21:36:43.619331: EV_MSC code=4 value=176

The result, is that when the brightness is turned down, it goes right down to zero or vise versa. The keyboard then becomes locked and I need to switch to the console and back to the desktop to fix it.

Thanks

[Stephen Brandwood (sbrandwoo)]

I now notice that a single press of FN + Brightness Up/Down is changing the brightness 1 notch, but only on the On Screen Display that appears in the top right of the screen, the brightness itself does not change! input-events is not showing any new release events now, making this problem slighty intermitent.

I tried acpi_listen and nothing interesting appeared to happen.

So:
 - No released events with input-events
 - Intermittent problem where brightness key appears to be un-released, locking keyboard and forcing brightness OSD to extreme low/high.
 - Brightness of screen never changes.

Any ideas?

(Samsung Q210 with Ubuntu 9.04)