5

Everytime I reboot my HP dm4 Pavillion the brightness is zero on my screen. BTW I use a Ubuntu 12.04..

Jorge Castro
  • 71,754
jaikvk
  • 51
  • 1
  • Is that the darkest, lowest setting? – belacqua Nov 13 '12 at 17:16
  • See http://askubuntu.com/questions/93038/lenovo-laptop-dims-always-on-reboot?rq=1 and http://askubuntu.com/questions/97561/brightness-setting-is-reset-to-maximum-at-login?rq=1 – belacqua Nov 13 '12 at 17:18

1 Answers1

0

You can try this:-

edit the file /etc/rc.local

before the last line 'exit 0' add the following line:

echo 4 > /sys/class/backlight/acpi_video0/brightness

save and reboot.

This should then set your brightness. I will add the caveat that this doesn't always work with HP machines but hopefully you'll be OK.

Adeyfk
  • 89