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[Bug 71368] Re: Laptop backlight stays always on

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: phix <71368@xxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Apr 2011 23:13:50 -0000
Reply-to: Bug 71368 <71368@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This bug seems to affect me in 10.10 (I have not tried to reproduce it
yet in natty but I can in a few minutes). "xset dpms force off" will
stay off for 30-60s before coming on again. "sudo radeontool light off"
fails without an error. If I let the backlight turn off on it's own, it
seems to stay off (will test this shortly).

Are any workarounds confirmed? Is this the right place to post comments?

hardware: HP Pavilion dm3

xset -q (don't know why to post this, doing so for sake of completeness)
Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000000
  XKB indicators:
    00: Caps Lock:   off    01: Num Lock:    off    02: Scroll Lock: off
    03: Compose:     off    04: Kana:        off    05: Sleep:       off
    06: Suspend:     off    07: Mute:        off    08: Misc:        off
    09: Mail:        off    10: Charging:    off    11: Shift Lock:  off
    12: Group 2:     off    13: Mouse Keys:  off
  auto repeat delay:  500    repeat rate:  30
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        9fffffffffffffff
                        fff7ffffffffffff
  bell percent:  0    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  0    cycle:  0
Colors:
  default colormap:  0x20    BlackPixel:  0    WhitePixel:  16777215
Font Path:
  /usr/share/fonts/X11/misc,/usr/share/fonts/X11/100dpi/:unscaled,/usr/share/fonts/X11/75dpi/:unscaled,/usr/share/fonts/X11/Type1,/usr/share/fonts/X11/100dpi,/usr/share/fonts/X11/75dpi,/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType,built-ins
DPMS (Energy Star):
  Standby: 0    Suspend: 0    Off: 0
  DPMS is Enabled
  Monitor is On

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https://bugs.launchpad.net/bugs/71368

Title:
  Laptop backlight stays always on